Littelfuse POWR-SPEED FUSES High-Speed Round-Body Fuses Selection Guide

of 30
HIGH-SPEED SEMICONDUCTOR PRODUCTS CATALOG
选型目录：
POWR-SPEED High-Speed Semiconductor Fuses INTRODUCTION
POWR-SPEED FUSES
POWR-SPEED FUSES High-Speed Square-Body Fuses
POWR-SPEED FUSES High-Speed Round-Body Fuses
POWR-SPEED FUSE ACCESSORIES
SPECIAL PURPOSE FUSES
POWR-SPEED Fuse CROSS REFERENCE GUIDE
Littelfuse.com/L75QS
© 2019 Littelfuse, Inc.
Rev: 1-B-073119
1 of 13
POWR-
SPEED
®
Fuse
L75QS SERIES HIGH-SPEED ROUND BODY
Specifi cations
Voltage Rating
Dc: 750 V
Amperage Rating
35–800 A
Interrupting Rating
Dc: 50 kA
Time Constant
10 ms
Material
Body: melamine
Caps: copper alloy
Approvals
UL Recognized (E71611)
cURus (E71611)
Environmental
RoHS Compliant, REACH
Country of Origin
Mexico
Operating Temperature
-55 °C to +125 °C
Storage Temperature
Up to 35 °C with relative humidity <65 %
L75 QS 700 . X
Part Numbering System
Body Type
Ampere Code
Series
Package Quantity
X = 1 (225–800 A)
V = 5 (35–200 A)
SERIES
BODY
TYPE
AMPERE
CODE
PACKAGE
QUANTITY
CATALOG
NUMBER
ORDERING
NUMBER
L75
QS
700
1
L75QS700
L75QS700.X
Recommended Fuse Blocks
LSCR101 (35 –100 A)
LSCR102 (125–800 A)
LSCR103 (450–800 A)
Web Resources
Download technical documents:
Littelfuse.com/L75QS
Note: high-speed fuses are designed for fi xed installations. They are not
intended for use in moving vehicle applications.
Description
The L75QS series is a next generation high-speed fuse
for the protection of power semiconductor devices and is
designed in the traditional round body bolted style package.
L75QS series high-speed fuses rated at 750 V dc are
extremely current limiting and are used to protect power
converters, drives and control circuit applications. Designed
with lower I
2
t performance characteristics, these fuses
provide balanced performance to extend longevity while
lowering potentially damaging heat energy to the devices
being protected.
In addition L75QS series fuses have been designed with a
universal mounting option to meet customer requirements
for installation into a variety of application configurations.
Littelfuse POWR-
SPEED
products offer optimized circuit
protection at the extremely fast speed required to protect
modern day, sensitive, high-power semiconductor devices.
Features
Compliance with US and Canadian requirements
Traditional North American bolted style dimensions
750 V dc performance
Direct bus-bar mount or stud mount design
Halogen free, RoHS and REACH Compliant
Applications
Power converters (inverters, rectifi ers)
Power supplies, UPS
EV charging stations
Variable speed drives
Dc common bus
750 V dc
• Very Fast Acting
• 35–800 A
HF
Littelfuse.com/L75QS
© 2019 Littelfuse, Inc.
Rev: 1-B-073119
2 of 13
POWR-
SPEED
®
Fuse
L75QS SERIES HIGH-SPEED ROUND BODY
SERIES
AMPERAGE
RATING
AMPERE
CODE
CATALOG
NUMBER
ORDERING
NUMBER
PACK
QUANTITY
UPC
L75QS
35
035
L75QS035
L75QS035.V
5 Pcs/ Box
07945823571
L75QS
40
040
L75QS040
L75QS040.V
5 Pcs/ Box
07945823572
L75QS
50
050
L75QS050
L75QS050.V
5 Pcs/ Box
07945823573
L75QS
60
060
L75QS060
L75QS060.V
5 Pcs/ Box
07945823574
L75QS
70
070
L75QS070
L75QS070.V
5 Pcs/ Box
07945823575
L75QS
80
080
L75QS080
L75QS080.V
5 Pcs/ Box
07945823576
L75QS
90
090
L75QS090
L75QS090.V
5 Pcs/ Box
07945823577
L75QS
100
100
L75QS100
L75QS100.V
5 Pcs/ Box
07945823578
L75QS
125
125
L75QS125
L75QS125.V
5 Pcs/ Box
07945823579
L75QS
150
150
L75QS150
L75QS150.V
5 Pcs/ Box
07945823580
L75QS
175
175
L75QS175
L75QS175.V
5 Pcs/ Box
07945823581
L75QS
200
200
L75QS200
L75QS200.V
5 Pcs/ Box
07945823582
L75QS
225
225
L75QS225
L75QS225.X
1 Pc/ Box
07945823583
L75QS
250
250
L75QS250
L75QS250.X
1 Pc/ Box
07945823584
L75QS
300
300
L75QS300
L75QS300.X
1 Pc/ Box
07945823585
L75QS
350
350
L75QS350
L75QS350.X
1 Pc/ Box
07945823586
L75QS
400
400
L75QS400
L75QS400.X
1 Pc/ Box
07945823587
L75QS
450
450
L75QS450
L75QS450.X
1 Pc/ Box
07945823588
L75QS
500
500
L75QS500
L75QS500.X
1 Pc/ Box
07945823589
L75QS
600
600
L75QS600
L75QS600.X
1 Pc/ Box
07945823590
L75QS
700
700
L75QS700
L75QS700.X
1 Pc/ Box
07945823591
L75QS
800
800
L75QS800
L75QS800.X
1 Pc/ Box
07945823592
Ordering Information
Electrical Specifi cations
CATALOG
NUMBER
AMPERAGE
RATING
VOLTAGE
RATING
INTERRUPT
RATING
MELTING
(PRE-ARC)
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
WATTS LOSS
AT 80 % RATED
CURRENT
WATTS LOSS
AT 100 % RATED
CURRENT
DC
DC
50 KA @ 750 V DC
(W)
(W)
L75QS035
35
750
50 kA
129
406
5
8
L75QS040
40
750
50 kA
153
549
6
9
L75QS050
50
750
50 kA
196
776
6
12
L75QS060
60
750
50 kA
269
895
9
15
L75QS070
70
750
50 kA
359
1,399
10
20
L75QS080
80
750
50 kA
452
1,841
12
22
L75QS090
90
750
50 kA
625
2,498
13
25
L75QS100
100
750
50 kA
966
3,053
15
30
L75QS125
125
750
50 kA
2,208
7,069
13
24
L75QS150
150
750
50 kA
3,026
10,401
17
32
L75QS175
175
750
50 kA
4,216
14,786
20
38
L75QS200
200
750
50 kA
5,529
20,433
22
42
L75QS225
225
750
50 kA
9,226
27,520
22
40
L75QS250
250
750
50 kA
10,999
34,291
27
46
L75QS300
300
750
50 kA
16,296
49,297
31
57
L75QS350
350
750
50 kA
24,778
70,696
35
67
L75QS400
400
750
50 kA
34,225
102,567
41
79
L75QS450
450
750
50 kA
38,946
119,606
45
81
L75QS500
500
750
50 kA
42,747
132,252
56
112
L75QS600
600
750
50 kA
67,363
189,333
67
138
L75QS700
700
750
50 kA
99,387
302,425
72
138
L75QS800
800
750
50 kA
156,137
421,500
76
142
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
30 of 68
L75QS SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L75QS
© 2019 Littelfuse, Inc.
Rev: 1-B-073119
2 of 13
POWR-
SPEED
®
Fuse
L75QS SERIES HIGH-SPEED ROUND BODY
SERIES
AMPERAGE
RATING
AMPERE
CODE
CATALOG
NUMBER
ORDERING
NUMBER
PACK
QUANTITY
UPC
L75QS
35
035
L75QS035
L75QS035.V
5 Pcs/ Box
07945823571
L75QS
40
040
L75QS040
L75QS040.V
5 Pcs/ Box
07945823572
L75QS
50
050
L75QS050
L75QS050.V
5 Pcs/ Box
07945823573
L75QS
60
060
L75QS060
L75QS060.V
5 Pcs/ Box
07945823574
L75QS
70
070
L75QS070
L75QS070.V
5 Pcs/ Box
07945823575
L75QS
80
080
L75QS080
L75QS080.V
5 Pcs/ Box
07945823576
L75QS
90
090
L75QS090
L75QS090.V
5 Pcs/ Box
07945823577
L75QS
100
100
L75QS100
L75QS100.V
5 Pcs/ Box
07945823578
L75QS
125
125
L75QS125
L75QS125.V
5 Pcs/ Box
07945823579
L75QS
150
150
L75QS150
L75QS150.V
5 Pcs/ Box
07945823580
L75QS
175
175
L75QS175
L75QS175.V
5 Pcs/ Box
07945823581
L75QS
200
200
L75QS200
L75QS200.V
5 Pcs/ Box
07945823582
L75QS
225
225
L75QS225
L75QS225.X
1 Pc/ Box
07945823583
L75QS
250
250
L75QS250
L75QS250.X
1 Pc/ Box
07945823584
L75QS
300
300
L75QS300
L75QS300.X
1 Pc/ Box
07945823585
L75QS
350
350
L75QS350
L75QS350.X
1 Pc/ Box
07945823586
L75QS
400
400
L75QS400
L75QS400.X
1 Pc/ Box
07945823587
L75QS
450
450
L75QS450
L75QS450.X
1 Pc/ Box
07945823588
L75QS
500
500
L75QS500
L75QS500.X
1 Pc/ Box
07945823589
L75QS
600
600
L75QS600
L75QS600.X
1 Pc/ Box
07945823590
L75QS
700
700
L75QS700
L75QS700.X
1 Pc/ Box
07945823591
L75QS
800
800
L75QS800
L75QS800.X
1 Pc/ Box
07945823592
Ordering Information
Electrical Specifi cations
CATALOG
NUMBER
AMPERAGE
RATING
VOLTAGE
RATING
INTERRUPT
RATING
MELTING
(PRE-ARC)
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
WATTS LOSS
AT 80 % RATED
CURRENT
WATTS LOSS
AT 100 % RATED
CURRENT
DC
DC
50 KA @ 750 V DC
(W)
(W)
L75QS035
35
750
50 kA
129
406
5
8
L75QS040
40
750
50 kA
153
549
6
9
L75QS050
50
750
50 kA
196
776
6
12
L75QS060
60
750
50 kA
269
895
9
15
L75QS070
70
750
50 kA
359
1,399
10
20
L75QS080
80
750
50 kA
452
1,841
12
22
L75QS090
90
750
50 kA
625
2,498
13
25
L75QS100
100
750
50 kA
966
3,053
15
30
L75QS125
125
750
50 kA
2,208
7,069
13
24
L75QS150
150
750
50 kA
3,026
10,401
17
32
L75QS175
175
750
50 kA
4,216
14,786
20
38
L75QS200
200
750
50 kA
5,529
20,433
22
42
L75QS225
225
750
50 kA
9,226
27,520
22
40
L75QS250
250
750
50 kA
10,999
34,291
27
46
L75QS300
300
750
50 kA
16,296
49,297
31
57
L75QS350
350
750
50 kA
24,778
70,696
35
67
L75QS400
400
750
50 kA
34,225
102,567
41
79
L75QS450
450
750
50 kA
38,946
119,606
45
81
L75QS500
500
750
50 kA
42,747
132,252
56
112
L75QS600
600
750
50 kA
67,363
189,333
67
138
L75QS700
700
750
50 kA
99,387
302,425
72
138
L75QS800
800
750
50 kA
156,137
421,500
76
142
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
31 of 68
L75QS SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L75QS
© 2019 Littelfuse, Inc.
Rev: 1-B-073119
3 of 13
POWR-
SPEED
®
Fuse
L75QS SERIES HIGH-SPEED ROUND BODY
Dimensions
Millimeters [inches]
Document Number:
OL-L75QS000
Stud Size:
M8 (5/16”)
Recommended Torque:
15 Nm (132.76 in-lb)
Stud Size:
M8 (5/16”)
Recommended Torque:
15 Nm (132.76 in-lb)
Stud Size:
M8 (5/16”)
Recommended Torque:
15 Nm (132.76 in-lb)
Stud Size:
M 1 2 ( ½ ” )
Recommended Torque:
54 Nm (477.94 in-lb)
Stud Size:
M12 (1/2”)
Recommended Torque:
54 Nm (477.94 in-lb)
CH
ICAG
O, ILLINOIS
60
63
1
3RD AN
GLE
PROJEC
TION
B
OL-L75QS00
0
Littelfuse
®
RE
VI
SION
DR
WG
NO.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
4/5/
2018
H
S
I
N
I
F
C
E
P
S
L
T
A
M
UN
LESS
OT
HERWI
SE SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRAC
KETS
[ ] ARE INCH
ES DIMENS
IONING
AND DO
NOT INCL
UD
E PLATIN G. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-1994
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIO
NS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACT
ERISTI
C TH
AT
PROVID
ES AN INDICAT
ION
OF
PROC
ESS
PERFOR
MANCE.
PROC
ED
UR
E FOR ME
ASUREM
ENT
AND
TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIMENS
IONS, -MINIM
UM
CP VA
LUE
MU
ST BE WI
THIN
THE
DIMENS
IONAL
LIMITATION
S
SH
OW
N ON
DRAWING AN
D INITIA
LLY LOCATE
D TO
ALLOW FOR MAXIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L75Q
S SERIES
OUTL
INE
NTS
REVISION
REV
DATE
DE
SCRIPT
ION
A
4/25/18
519200
GC
P - RE
LEAS
E MR
Y
B
Y
R
M
S
E
C
N
A
R
E
L
O
T
E
D
A
L
B
D
D
A
-
D
/
P
C
E
6
5
5
0
2
5
9
1
/
5
2
/
3
111.13
1.59
4.375
0.063
[]
95.24
1.59
3.74
9
0.063
[]
84.12
1.59
3.31
2
0.063
[]
73.0
3
[2.875]
17.02
0.89
0.670
0.035
[]
8.73
[0.344]
25.4
0
0.38
1
1.00
0
0.01
5
[]
3.18
0.15
0.12
5
0.00
6
[]
72.2
4
[2.844]
73.03
[2.875]
30.9
4
0.38
1
1.21
8
0.01
5
[]
38.10
0.89
1.50
0
0.03
5
[]
10.4
1
[0.410]
129.39
1.59
5.09
4
0.06
3
[]
108.7
2
1.59
4.280
0.063
[]
86.76
1.59
3.41
6
0.063
[]
6.35
0.15
0.25
0
0.00
6
[]
50.8
0
0.38
1
2.00
0
0.01
5
[]
50.8
0
0.38
1
2.00
0
0.01
5
[]
6.35
0.15
0.25
0
0.0
06
[]
63.5
0
0.38
1
2.500
0.01
5
[]
9.53
0.15
0.37
5
0.00
6
[]
38.10
0.89
1.500
0.035
[]
13.46
[0.530]
180.09
1.59
7.090
0.06
3
[]
156.4
7
1.59
6.160
0.063
[]
89.67
1.59
3.53
0
0.06
3
[]
72.2
4
[2.844]
50.8
0
0.89
2.00
0
0.035
[]
13.4
6
[0.530]
173
.05
1.59
6.81
3
0.06
3
[]
142.8
3
1.59
5.62
3
0.063
[]
103.20
1.59
4.06
3
0.06
3
[]
72.2
4
[2.844]
35–100A
125–200A
225–400A
450–600A
700–800A
129.16
1.59
5.085
0.063
[]
106.3
0
1.59
4.18
5
0.063
[]
88.7
7
1.59
3.495
0.063
[]
10.4
1
[0.410]
22.7
3
0.89
0.89
5
0.03
5
[]
4.75
0.15
0.18
7
0.00
6
[]
14.29
[0.563]
33.27
[1.310]
46.86
[1.845]
21.39
[0.842]
19.1
8
[0.755]
CH
ICAG
O, ILLINOIS
60
63
1
3RD AN
GLE
PROJEC
TION
B
OL-L75QS00
0
Littelfuse
®
RE
VI
SION
DR
WG
NO.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
4/5/
2018
H
S
I
N
I
F
C
E
P
S
L
T
A
M
UN
LESS
OT
HERWI
SE SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRAC
KETS
[ ] ARE INCH
ES DIMENS
IONING
AND DO
NOT INCL
UD
E PLATIN G. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-1994
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIO
NS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACT
ERISTI
C TH
AT
PROVID
ES AN INDICAT
ION
OF
PROC
ESS
PERFOR
MANCE.
PROC
ED
UR
E FOR ME
ASUREM
ENT
AND
TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIMENS
IONS, -MINIM
UM
CP VA
LUE
MU
ST BE WI
THIN
THE
DIMENS
IONAL
LIMITATION
S
SH
OW
N ON
DRAWING AN
D INITIA
LLY LOCATE
D TO
ALLOW FOR MAXIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L75Q
S SERIES
OUTL
INE
NTS
REVISION
REV
DATE
DE
SCRIPT
ION
A
4/25/18
519200
GC
P - RE
LEAS
E MR
Y
B
Y
R
M
S
E
C
N
A
R
E
L
O
T
E
D
A
L
B
D
D
A
-
D
/
P
C
E
6
5
5
0
2
5
9
1
/
5
2
/
3
11
1.13
1.59
4.375
0.063
[]
95.24
1.59
3.74
9
0.063
[]
84.12
1.59
3.31
2
0.063
[]
73.0
3
[2.875]
17.02
0.89
0.670
0.035
[]
8.73
[0.344]
25.4
0
0.38
1
1.00
0
0.01
5
[]
3.18
0.15
0.12
5
0.00
6
[]
72.2
4
[2.844]
73.03
[2.875]
30.9
4
0.38
1
1.21
8
0.01
5
[]
38.10
0.89
1.50
0
0.03
5
[]
10.4
1
[0.410]
129.39
1.59
5.09
4
0.06
3
[]
108.7
2
1.59
4.280
0.063
[]
86.76
1.59
3.41
6
0.063
[]
6.35
0.15
0.25
0
0.00
6
[]
50.8
0
0.38
1
2.00
0
0.01
5
[]
50.8
0
0.38
1
2.00
0
0.01
5
[]
6.35
0.15
0.25
0
0.0
06
[]
63.5
0
0.38
1
2.50
0
0.01
5
[]
9.53
0.15
0.37
5
0.00
6
[]
38.10
0.89
1.500
0.035
[]
13.46
[0.530]
180.09
1.59
7.090
0.06
3
[]
156.4
7
1.59
6.160
0.063
[]
89.67
1.59
3.53
0
0.06
3
[]
72.2
4
[2.844]
50.8
0
0.89
2.00
0
0.035
[]
13.4
6
[0.530]
173
.05
1.59
6.81
3
0.06
3
[]
142.8
3
1.59
5.62
3
0.063
[]
103.20
1.59
4.06
3
0.06
3
[]
72.2
4
[2.844]
35–100A
125–200A
225–400A
450–600A
700–800A
129.16
1.59
5.085
0.063
[]
106.3
0
1.59
4.18
5
0.063
[]
88.7
7
1.59
3.495
0.063
[]
10.4
1
[0.410]
22.7
3
0.89
0.89
5
0.03
5
[]
4.75
0.15
0.18
7
0.00
6
[]
14.29
[0.563]
33.27
[1.310]
46.86
[1.845]
21.39
[0.842]
19.1
8
[0.755]
CH
ICAG
O, ILLINOIS
60
63
1
3RD AN
GLE
PROJEC
TION
B
OL-L75QS00
0
Littelfuse
®
RE
VI
SION
DR
WG
NO.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
4/5/
2018
H
S
I
N
I
F
C
E
P
S
L
T
A
M
UN
LESS
OT
HERWI
SE SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRAC
KETS
[ ] ARE INCH
ES DIMENS
IONING
AND DO
NOT INCL
UD
E PLATIN G. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-1994
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIO
NS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACT
ERISTI
C TH
AT
PROVID
ES AN INDICAT
ION
OF
PROC
ESS
PERFOR
MANCE.
PROC
ED
UR
E FOR ME
ASUREM
ENT
AND
TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIMENS
IONS, -MINIM
UM
CP VA
LUE
MU
ST BE WI
THIN
THE
DIMENS
IONAL
LIMITATION
S
SH
OW
N ON
DRAWING AN
D INITIA
LLY LOCATE
D TO
ALLOW FOR MAXIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L75Q
S SERIES
OUTL
INE
NTS
REVISION
REV
DATE
DE
SCRIPT
ION
A
4/25/18
519200
GC
P - RE
LEAS
E MR
Y
B
Y
R
M
S
E
C
N
A
R
E
L
O
T
E
D
A
L
B
D
D
A
-
D
/
P
C
E
6
5
5
0
2
5
9
1
/
5
2
/
3
111.13
1.59
4.375
0.063
[]
95.24
1.59
3.74
9
0.063
[]
84.12
1.59
3.31
2
0.063
[]
73.0
3
[2.875]
17.02
0.89
0.670
0.035
[]
8.73
[0.344]
25.4
0
0.38
1
1.00
0
0.01
5
[]
3.18
0.15
0.12
5
0.00
6
[]
72.2
4
[2.844]
73.03
[2.875]
30.9
4
0.38
1
1.21
8
0.01
5
[]
38.10
0.89
1.50
0
0.03
5
[]
10.4
1
[0.410]
129.39
1.59
5.09
4
0.06
3
[]
108.7
2
1.59
4.280
0.063
[]
86.76
1.59
3.41
6
0.063
[]
6.35
0.15
0.25
0
0.00
6
[]
50.8
0
0.38
1
2.00
0
0.01
5
[]
50.8
0
0.38
1
2.00
0
0.01
5
[]
6.35
0.15
0.25
0
0.0
06
[]
63.5
0
0.38
1
2.50
0
0.01
5
[]
9.53
0.15
0.37
5
0.00
6
[]
38.10
0.89
1.500
0.035
[]
13.46
[0.530]
180.09
1.59
7.090
0.06
3
[]
156.4
7
1.59
6.160
0.063
[]
89.67
1.59
3.53
0
0.06
3
[]
72.2
4
[2.844]
50.8
0
0.89
2.00
0
0.035
[]
13.4
6
[0.530]
173
.05
1.59
6.81
3
0.06
3
[]
142.8
3
1.59
5.62
3
0.063
[]
103.20
1.59
4.06
3
0.06
3
[]
72.2
4
[2.844]
35–100A
125–200A
225–400A
450–600A
700–800A
129.16
1.59
5.085
0.063
[]
106.3
0
1.59
4.18
5
0.063
[]
88.7
7
1.59
3.495
0.063
[]
10.4
1
[0.410]
22.7
3
0.89
0.89
5
0.03
5
[]
4.75
0.15
0.18
7
0.00
6
[]
14.29
[0.563]
33.27
[1.310]
46.86
[1.845]
21.39
[0.842]
19.1
8
[0.755]
CH
ICAG
O, ILLINOIS
60
63
1
3RD AN
GLE
PROJEC
TION
B
OL-L75QS00
0
Littelfuse
®
RE
VI
SION
DR
WG
NO.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
4/5/
2018
H
S
I
N
I
F
C
E
P
S
L
T
A
M
UN
LESS
OT
HERWI
SE SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRAC
KETS
[ ] ARE INCH
ES DIMENS
IONING
AND DO
NOT INCL
UD
E PLATIN G. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-1994
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIO
NS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACT
ERISTI
C TH
AT
PROVID
ES AN INDICAT
ION
OF
PROC
ESS
PERFOR
MANCE.
PROC
ED
UR
E FOR ME
ASUREM
ENT
AND
TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIMENS
IONS, -MINIM
UM
CP VA
LUE
MU
ST BE WI
THIN
THE
DIMENS
IONAL
LIMITATION
S
SH
OW
N ON
DRAWING AN
D INITIA
LLY LOCATE
D TO
ALLOW FOR MAXIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L75Q
S SERIES
OUTL
INE
NTS
REVISION
REV
DATE
DE
SCRIPT
ION
A
4/25/18
519200
GC
P - RE
LEAS
E MR
Y
B
Y
R
M
S
E
C
N
A
R
E
L
O
T
E
D
A
L
B
D
D
A
-
D
/
P
C
E
6
5
5
0
2
5
9
1
/
5
2
/
3
111.13
1.59
4.375
0.063
[]
95.24
1.59
3.74
9
0.063
[]
84.12
1.59
3.31
2
0.063
[]
73.0
3
[2.875]
17.02
0.89
0.670
0.035
[]
8.73
[0.344]
25.4
0
0.38
1
1.00
0
0.01
5
[]
3.18
0.15
0.12
5
0.00
6
[]
72.2
4
[2.844]
73.03
[2.875]
30.9
4
0.38
1
1.21
8
0.01
5
[]
38.10
0.89
1.50
0
0.03
5
[]
10.4
1
[0.410]
129.39
1.59
5.09
4
0.06
3
[]
108.7
2
1.59
4.280
0.063
[]
86.76
1.59
3.41
6
0.063
[]
6.35
0.15
0.25
0
0.00
6
[]
50.8
0
0.38
1
2.00
0
0.01
5
[]
50.8
0
0.38
1
2.00
0
0.01
5
[]
6.35
0.15
0.25
0
0.0
06
[]
63.5
0
0.38
1
2.50
0
0.01
5
[]
9.53
0.15
0.37
5
0.00
6
[]
38.10
0.89
1.500
0.035
[]
13.46
[0.530]
180.09
1.59
7.090
0.06
3
[]
156.4
7
1.59
6.160
0.063
[]
89.67
1.59
3.53
0
0.06
3
[]
72.2
4
[2.844]
50.8
0
0.89
2.00
0
0.035
[]
13.4
6
[0.530]
173
.05
1.59
6.81
3
0.06
3
[]
142.8
3
1.59
5.62
3
0.063
[]
103.20
1.59
4.06
3
0.06
3
[]
72.2
4
[2.844]
35–100A
125–200A
225–400A
450–600A
700–800A
129.16
1.59
5.085
0.063
[]
106.3
0
1.59
4.18
5
0.063
[]
88.7
7
1.59
3.495
0.063
[]
10.4
1
[0.410]
22.7
3
0.89
0.89
5
0.03
5
[]
4.75
0.15
0.18
7
0.00
6
[]
14.29
[0.563]
33.27
[1.310]
46.86
[1.845]
21.39
[0.842]
19.1
8
[0.755]
CH
ICAG
O, ILLINOIS
60
63
1
3RD AN
GLE
PROJEC
TION
B
OL-L75QS00
0
Littelfuse
®
RE
VI
SION
DR
WG
NO.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
4/5/
2018
H
S
I
N
I
F
C
E
P
S
L
T
A
M
UN
LESS
OT
HERWI
SE SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRAC
KETS
[ ] ARE INCH
ES DIMENS
IONING
AND DO
NOT INCL
UD
E PLATIN G. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-1994
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIO
NS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACT
ERISTI
C TH
AT
PROVID
ES AN INDICAT
ION
OF
PROC
ESS
PERFOR
MANCE.
PROC
ED
UR
E FOR ME
ASUREM
ENT
AND
TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIMENS
IONS, -MINIM
UM
CP VA
LUE
MU
ST BE WI
THIN
THE
DIMENS
IONAL
LIMITATION
S
SH
OW
N ON
DRAWING AN
D INITIA
LLY LOCATE
D TO
ALLOW FOR MAXIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L75Q
S SERIES
OUTL
INE
NTS
REVISION
REV
DATE
DE
SCRIPT
ION
A
4/25/18
519200
GC
P - RE
LEAS
E MR
Y
B
Y
R
M
S
E
C
N
A
R
E
L
O
T
E
D
A
L
B
D
D
A
-
D
/
P
C
E
6
5
5
0
2
5
9
1
/
5
2
/
3
111.13
1.59
4.375
0.063
[]
95.24
1.59
3.74
9
0.063
[]
84.12
1.59
3.31
2
0.063
[]
73.0
3
[2.875]
17.02
0.89
0.670
0.035
[]
8.73
[0.344]
25.4
0
0.38
1
1.00
0
0.01
5
[]
3.18
0.15
0.12
5
0.00
6
[]
72.2
4
[2.844]
73.03
[2.875]
30.9
4
0.38
1
1.21
8
0.01
5
[]
38.10
0.89
1.50
0
0.03
5
[]
10.4
1
[0.410]
129.39
1.59
5.09
4
0.06
3
[]
108.7
2
1.59
4.280
0.063
[]
86.76
1.59
3.41
6
0.063
[]
6.35
0.15
0.25
0
0.00
6
[]
50.8
0
0.38
1
2.00
0
0.01
5
[]
50.8
0
0.38
1
2.00
0
0.01
5
[]
6.35
0.15
0.25
0
0.0
06
[]
63.5
0
0.38
1
2.50
0
0.01
5
[]
9.53
0.15
0.37
5
0.00
6
[]
38.10
0.89
1.500
0.035
[]
13.46
[0.530]
180.09
1.59
7.090
0.06
3
[]
156.4
7
1.59
6.160
0.063
[]
89.67
1.59
3.53
0
0.06
3
[]
72.2
4
[2.844]
50.8
0
0.89
2.00
0
0.035
[]
13.4
6
[0.530]
173
.05
1.59
6.81
3
0.06
3
[]
142.8
3
1.59
5.62
3
0.063
[]
103.20
1.59
4.06
3
0.06
3
[]
72.2
4
[2.844]
35–100A
125–200A
225–400A
450–600A
700–800A
129.16
1.59
5.085
0.063
[]
106.3
0
1.59
4.18
5
0.063
[]
88.7
7
1.59
3.495
0.063
[]
10.4
1
[0.410]
22.7
3
0.89
0.89
5
0.03
5
[]
4.75
0.15
0.18
7
0.00
6
[]
14.29
[0.563]
33.27
[1.310]
46.86
[1.845]
21.39
[0.842]
19.1
8
[0.755]
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
32 of 68
L75QS SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L70QS
© 2020 Littelfuse, Inc.
Rev: 092820
1 of 11
POWR-
SPEED
®
Fuse
L70QS SERIES HIGH-SPEED ROUND BODY
Specifi cations
Voltage Rating
Ac: 700 V
Dc: 700 V
Amperage Rating
35–800 A
Interrupting Rating
Ac: 200 kA
Dc: 50 kA
Time Constant
10 ms
Material
Body: melamine
Caps: copper alloy (silver plated)
Approvals
UL Recognized (E71611)
cURus (E71611)
Environmental
RoHS Compliant, REACH
Country of Origin
Mexico
Operating Temperature
-55 °C to +125 °C
Storage Temperature
Up to 35 °C with relative humidity <65 %
Description
The L70QS series is a next generation high-speed fuse
for the protection of power semiconductor devices and
is designed in the traditional North American bolted style
package.
L70QS series high-speed fuses are extremely current
limiting and are used to protect power converters, drives
and control circuit applications. Designed with lower I
2
t
performance characteristics, these fuses provide balanced
performance to extend longevity while lowering potentially
damaging heat energy to the devices being protected.
In addition L70QS series fuses have been designed with a
universal mounting option to meet customer requirements
for installation into a variety of application configurations
Littelfuse POWR-
SPEED
products offer optimized
circuit protection at the extremely fast speed required to
protect modern day, sensitive, high-power semiconductor
devices. Such products are commonly found in various
industries including pulp and paper industries, cranes and
heavy-lifting equipment, processing industries, wastewater
treatment plants and large factories and MRO facilities.
Features
Compliance with US and Canadian requirements
Traditional North American bolted style dimensions
Class aR performance
Direct bus-bar mount or stud mount design
Halogen free, RoHS and REACH Compliant
Applications
Power converters (inverters, rectifi ers)
Power supplies
UPS
Variable speed drives
Control circuits
Soft starters
Recommended Fuse Blocks
LSCR001 (35–100 A)
LSCR002 (125–800 A)
700 V ac/dc • Very Fast Acting • 35–800 A
Part Numbering System
L70 QS 700 .X
Body Type
Ampere Code
Series
Package Quantity
X = 1 (225–800 A)
V = 5 (35–200 A)
SERIES
BODY
TYPE
AMPERE
CODE
PACKAGE
QUANTITY
CATALOG
NUMBER
ORDERING
NUMBER
L70
QS
700
1
L70QS700
L70QS700.X
Web Resources
Download technical documents:
Littelfuse.com/L70QS
Note: high-speed fuses are designed for fi xed installations. They are not
intended for use in moving vehicle applications.
HF
Refer to Ordering
Information table
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
33 of 68
L70QS SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L70QS
© 2020 Littelfuse, Inc.
Rev: 092820
2 of 11
POWR-
SPEED
®
Fuse
L70QS SERIES HIGH-SPEED ROUND BODY
SERIES
AMPERAGE
RATING
AMPERE
CODE
CATALOG
NUMBER
ORDERING
NUMBER
PACK
QUANTITY
UPC
L70QS
35
035
L70QS035
L70QS035.V
5 Pcs/ Box
07945886015
L70QS
40
040
L70QS040
L70QS040.V
5 Pcs/ Box
07945886016
L70QS
50
050
L70QS050
L70QS050.V
5 Pcs/ Box
07945886017
L70QS
60
060
L70QS060
L70QS060.V
5 Pcs/ Box
07945886018
L70QS
70
070
L70QS070
L70QS070.V
5 Pcs/ Box
07945886019
L70QS
80
080
L70QS080
L70QS080.V
5 Pcs/ Box
07945886020
L70QS
90
090
L70QS090
L70QS090.V
5 Pcs/ Box
07945886021
L70QS
100
100
L70QS100
L70QS100.V
5 Pcs/ Box
07945886022
L70QS
125
125
L70QS125
L70QS125.V
5 Pcs/ Box
07945886023
L70QS
150
150
L70QS150
L70QS150.V
5 Pcs/ Box
07945886024
L70QS
175
175
L70QS175
L70QS175.V
5 Pcs/ Box
07945886025
L70QS
200
200
L70QS200
L70QS200.V
5 Pcs/ Box
07945886026
L70QS
225
225
L70QS225
L70QS225.X
1 Pc/ Box
07945886027
L70QS
250
250
L70QS250
L70QS250.X
1 Pc/ Box
07945886028
L70QS
300
300
L70QS300
L70QS300.X
1 Pc/ Box
07945886029
L70QS
350
350
L70QS350
L70QS350.X
1 Pc/ Box
07945886030
L70QS
400
400
L70QS400
L70QS400.X
1 Pc/ Box
07945886031
L70QS
450
450
L70QS450
L70QS450.X
1 Pc/ Box
07945886032
L70QS
500
500
L70QS500
L70QS500.X
1 Pc/ Box
07945886033
L70QS
600
600
L70QS600
L70QS600.X
1 Pc/ Box
07945886034
L70QS
700
700
L70QS700
L70QS700.X
1 Pc/ Box
07945886035
L70QS
800
800
L70QS800
L70QS800.X
1 Pc/ Box
07945886036
Ordering Information
Electrical Specifi cations
CATALOG
NUMBER
AMPERAGE
RATING
VOLTAGE
RATING
INTERRUPT
RATING
MELTING
(PRE-ARC)
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
WATTS LOSS
AT 80 % RATED
CURRENT
WATTS LOSS
AT 100 % RATED
CURRENT
AC
DC
AC
DC
200
kA @ 700 V AC
50
kA @ 700 V DC
(W)
(W)
L70QS035
35
700
700
200 kA
50 kA
129
332
308
5
8
L70QS040
40
700
700
200 kA
50 kA
15 3
599
416
6
9
L70QS050
50
700
700
200 kA
50 kA
196
711
588
6
12
L70QS060
60
700
700
200 kA
50 kA
269
1, 2 3 3
678
9
15
L70QS070
70
700
700
200 kA
50 kA
359
1,5 75
1,0 75
10
20
L70QS080
80
700
700
200 kA
50 kA
452
2,755
1, 415
12
22
L70QS090
90
700
700
200 kA
50 kA
625
3,365
1,9 2 0
13
25
L70QS100
100
700
700
200 kA
50 kA
966
3,747
2,347
15
30
L70QS125
125
700
700
200 kA
50 kA
2,208
8,795
5,570
13
24
L70QS150
150
700
700
200 kA
50 kA
3,026
13,650
8,19 5
17
32
L70QS175
175
700
700
200 kA
50 kA
4,219
19,550
11, 6 5 0
20
38
L70QS200
200
700
700
200 kA
50 kA
5,529
22,067
16,100
22
42
L70QS225
225
700
700
200 kA
50 kA
9,226
34,900
25,400
22
40
L70QS250
250
700
700
200 kA
50 kA
10,999
43,750
31,6 5 0
27
46
L70QS300
300
700
700
200 kA
50 kA
16,296
64,400
45,500
31
57
L70QS350
350
700
700
200 kA
50 kA
24,778
91,500
65,250
35
67
L70QS400
400
700
700
200 kA
50 kA
34,225
110, 6 6 7
94,666
41
79
L70QS450
450
700
700
200 kA
50 kA
38,946
145,500
113,500
45
81
L70QS500
500
700
700
200 kA
50 kA
42,747
173,000
125,500
56
112
L70QS600
600
700
700
200 kA
50 kA
67,363
220,333
179,667
67
138
L70QS700
700
700
700
200 kA
50 kA
99,387
368,000
298,000
72
138
L70QS800
800
700
700
200 kA
50 kA
15 6,13 7
466,333
415,333
76
142
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
34 of 68
L70QS SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L70QS
© 2020 Littelfuse, Inc.
Rev: 092820
2 of 11
POWR-
SPEED
®
Fuse
L70QS SERIES HIGH-SPEED ROUND BODY
SERIES
AMPERAGE
RATING
AMPERE
CODE
CATALOG
NUMBER
ORDERING
NUMBER
PACK
QUANTITY
UPC
L70QS
35
035
L70QS035
L70QS035.V
5 Pcs/ Box
07945886015
L70QS
40
040
L70QS040
L70QS040.V
5 Pcs/ Box
07945886016
L70QS
50
050
L70QS050
L70QS050.V
5 Pcs/ Box
07945886017
L70QS
60
060
L70QS060
L70QS060.V
5 Pcs/ Box
07945886018
L70QS
70
070
L70QS070
L70QS070.V
5 Pcs/ Box
07945886019
L70QS
80
080
L70QS080
L70QS080.V
5 Pcs/ Box
07945886020
L70QS
90
090
L70QS090
L70QS090.V
5 Pcs/ Box
07945886021
L70QS
100
100
L70QS100
L70QS100.V
5 Pcs/ Box
07945886022
L70QS
125
125
L70QS125
L70QS125.V
5 Pcs/ Box
07945886023
L70QS
150
150
L70QS150
L70QS150.V
5 Pcs/ Box
07945886024
L70QS
175
175
L70QS175
L70QS175.V
5 Pcs/ Box
07945886025
L70QS
200
200
L70QS200
L70QS200.V
5 Pcs/ Box
07945886026
L70QS
225
225
L70QS225
L70QS225.X
1 Pc/ Box
07945886027
L70QS
250
250
L70QS250
L70QS250.X
1 Pc/ Box
07945886028
L70QS
300
300
L70QS300
L70QS300.X
1 Pc/ Box
07945886029
L70QS
350
350
L70QS350
L70QS350.X
1 Pc/ Box
07945886030
L70QS
400
400
L70QS400
L70QS400.X
1 Pc/ Box
07945886031
L70QS
450
450
L70QS450
L70QS450.X
1 Pc/ Box
07945886032
L70QS
500
500
L70QS500
L70QS500.X
1 Pc/ Box
07945886033
L70QS
600
600
L70QS600
L70QS600.X
1 Pc/ Box
07945886034
L70QS
700
700
L70QS700
L70QS700.X
1 Pc/ Box
07945886035
L70QS
800
800
L70QS800
L70QS800.X
1 Pc/ Box
07945886036
Ordering Information
Electrical Specifi cations
CATALOG
NUMBER
AMPERAGE
RATING
VOLTAGE
RATING
INTERRUPT
RATING
MELTING
(PRE-ARC)
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
WATTS LOSS
AT 80 % RATED
CURRENT
WATTS LOSS
AT 100 % RATED
CURRENT
AC
DC
AC
DC
200
kA @ 700 V AC
50
kA @ 700 V DC
(W)
(W)
L70QS035
35
700
700
200 kA
50 kA
129
332
308
5
8
L70QS040
40
700
700
200 kA
50 kA
15 3
599
416
6
9
L70QS050
50
700
700
200 kA
50 kA
196
711
588
6
12
L70QS060
60
700
700
200 kA
50 kA
269
1, 2 3 3
678
9
15
L70QS070
70
700
700
200 kA
50 kA
359
1,5 75
1,0 75
10
20
L70QS080
80
700
700
200 kA
50 kA
452
2,755
1, 415
12
22
L70QS090
90
700
700
200 kA
50 kA
625
3,365
1,9 2 0
13
25
L70QS100
100
700
700
200 kA
50 kA
966
3,747
2,347
15
30
L70QS125
125
700
700
200 kA
50 kA
2,208
8,795
5,570
13
24
L70QS150
150
700
700
200 kA
50 kA
3,026
13,650
8,19 5
17
32
L70QS175
175
700
700
200 kA
50 kA
4,219
19,550
11, 6 5 0
20
38
L70QS200
200
700
700
200 kA
50 kA
5,529
22,067
16,100
22
42
L70QS225
225
700
700
200 kA
50 kA
9,226
34,900
25,400
22
40
L70QS250
250
700
700
200 kA
50 kA
10,999
43,750
31,6 5 0
27
46
L70QS300
300
700
700
200 kA
50 kA
16,296
64,400
45,500
31
57
L70QS350
350
700
700
200 kA
50 kA
24,778
91,500
65,250
35
67
L70QS400
400
700
700
200 kA
50 kA
34,225
110, 6 6 7
94,666
41
79
L70QS450
450
700
700
200 kA
50 kA
38,946
145,500
113,500
45
81
L70QS500
500
700
700
200 kA
50 kA
42,747
173,000
125,500
56
112
L70QS600
600
700
700
200 kA
50 kA
67,363
220,333
179,667
67
138
L70QS700
700
700
700
200 kA
50 kA
99,387
368,000
298,000
72
138
L70QS800
800
700
700
200 kA
50 kA
15 6,13 7
466,333
415,333
76
142
Littelfuse.com/L70QS
© 2020 Littelfuse, Inc.
Rev: 092820
3 of 11
POWR-
SPEED
®
Fuse
L70QS SERIES HIGH-SPEED ROUND BODY
Dimensions
Millimeters [inches]
Stud Size:
M8 (5/16”)
Recommended Torque:
15 Nm (132.76 in-lb)
Stud Size:
M8 (5/16”)
Recommended Torque:
15 Nm (132.76 in-lb)
Stud Size:
M8 (5/16”)
Recommended Torque:
15 Nm (132.76 in-lb)
Stud Size:
M12 (1/2”)
Recommended Torque:
54 Nm (477.94 in-lb)
Stud Size:
M12 (1/2”)
Recommended Torque:
54 Nm (477.94 in-lb)
Document Number:
OL-L70QS000
3RD AN
GLE
PROJEC
TION
E
OL-L70Q
S000
Littelfus
e
®
RE
VI
SION
DR
WG
NO
.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
9/3/
2015
MA
TL SPEC
FINISH
UN
LESS
OT
HERWIS
E SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRACKETS
[ ] ARE INCH
ES DIME
NS
IONING
AND DO
NOT INCL
UD
E PLATING. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-199
4
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIONS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACTERIST
IC TH
AT
PROVID
ES AN INDICA
TION
OF
PROC
ESS
PERFOR
MA
NCE. PR
OC
ED
UR
E FOR ME
ASUREM
ENT
AN
D TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIME
NSIONS, -M
INIM
UM
CP
VALU
E
MU
ST BE WI
THIN
TH
E DIME
NSIONAL
LIMITATION
S
SH
OW
N ON
DR
AWING AND INITIALL
Y LOCATE
D TO
ALLOW FOR MA
XIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L70Q
S SERIES
OUTL
INE
NTS
REVISION
REV
DA
TE
DE
SCRIPTION
A
3/23/16
515693G
CP - RE
LEAS
E MR
Y
B
9/6/16
516327E
CP/D - CH
G DA
TA
SHEET REVISION
MR
Y
C
6/6/17
517
424E
CP/D
- REMO
VE DA
TA SH
EET REVISION
MR
Y
D
9/5/17
517727
ECP/D - ADD DI
ME
NSION TO
LERANC
ES MR
Y
E
3/25/19
520556E
CP/D - ADD
BLAD
E TOLE
RANC
ES MR
Y
11
1.13
±1
.59
4.375
±0
.063
[]
95.2
4±
1.59
3.749
±0
.063
[]
84.
1
2±
1.59
3.31
2±
0.063
[]
73.03
[2.875
]
17.0
2±
0.89
0.670
±0
.035
[]
8.73
[0.344]
Ø2
5.40
±0
.381
1.00
0±
0.01
5
[]
3.18
±0
.15
0.12
5±
0.006
[]
72.2
4
[2.844]
73.03
[2.875]
30.94
±
Ø0
.381
1.218
±0
.015
[]
38.10
±0
.89
1.500
±0
.035
[]
10.41
[0.410]
129.39
±1
.59
5.09
4±
0.063
[]
108.7
2±
1.59
4.280
±0
.063
[]
86.7
6±
1.59
3.416
±0
.063
[]
6.35
±0
.15
0.25
0±
0.006
[]
50.80
±
Ø0
.381
2.000
±0
.015
[]
50.80
±
Ø0
.381
2.000
±0
.015
[]
6.35
±0
.15
0.25
0±
0.006
[]
63.50
±
Ø0
.381
2.500
±0
.015
[]
9.53
±0
.15
0.375
±0
.006
[]
38.10
±0
.89
1.500
±0
.035
[]
13.4
6
[0.530]
180.09
±1
.59
7.090
±0
.063
[]
156.4
7±
1.59
6.16
0±
0.06
3
[]
89.67
±1
.59
3.53
0±
0.063
[]
72.24
[2.844]
50.80
±0
.89
2.00
0±
0.03
5
[]
13.46
[0.530]
173
.05±
1.59
6.813
±0
.063
[]
142.83
±1
.59
5.623
±0
.063
[]
103.20
±1
.59
4.06
3±
0.063
[]
72.24
[2.844
]
35–100A
125–200A
225–
400A
450–
600A
700–
800A
129.16
±1
.59
5.085
±0
.063
[]
106.30
±1
.59
4.185
±0
.063
[]
88.77
±1
.59
3.495
±0
.063
[]
10.4
1
[0.410]
22.73
±0
.89
0.895
±0
.035
[]
4.75
±0
.15
0.18
7±
0.006
[]
14.29
[0.563]
33.2
7
[1.310]
46.86
[1.845]
21.3
9
[0.842
]
19.18
[0.755
]
3RD AN
GLE
PROJEC
TION
E
OL-L70Q
S000
Littelfus
e
®
RE
VI
SION
DR
WG
NO
.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
9/3/
2015
MA
TL SPEC
FINISH
UN
LESS
OT
HERWIS
E SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRACKETS
[ ] ARE INCH
ES DIME
NS
IONING
AND DO
NOT INCL
UD
E PLATING. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-199
4
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIONS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACTERIST
IC TH
AT
PROVID
ES AN INDICA
TION
OF
PROC
ESS
PERFOR
MA
NCE. PR
OC
ED
UR
E FOR ME
ASUREM
ENT
AN
D TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIME
NSIONS, -M
INIM
UM
CP
VALU
E
MU
ST BE WI
THIN
TH
E DIME
NSIONAL
LIMITATION
S
SH
OW
N ON
DR
AWING AND INITIALL
Y LOCATE
D TO
ALLOW FOR MA
XIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L70Q
S SERIES
OUTL
INE
NTS
REVISION
REV
DA
TE
DE
SCRIPTION
A
3/23/16
515693G
CP - RE
LEAS
E MR
Y
B
9/6/16
516327E
CP/D - CH
G DA
TA
SHEET REVISION
MR
Y
C
6/6/17
517
424E
CP/D
- REMO
VE DA
TA SH
EET REVISION
MR
Y
D
9/5/17
517727
ECP/D - ADD DI
ME
NSION TO
LERANC
ES MR
Y
E
3/25/19
520556E
CP/D - ADD
BLAD
E TOLE
RANC
ES MR
Y
111.13
±1
.59
4.375
±0
.063
[]
95.2
4±
1.59
3.749
±0
.063
[]
84.
1
2±
1.59
3.31
2±
0.063
[]
73.03
[2.875
]
17.0
2±
0.89
0.670
±0
.035
[]
8.73
[0.344]
Ø2
5.40
±0
.381
1.00
0±
0.01
5
[]
3.18
±0
.15
0.12
5±
0.006
[]
72.2
4
[2.844]
73.03
[2.875]
30.94
±
Ø0
.381
1.218
±0
.015
[]
38.10
±0
.89
1.500
±0
.035
[]
10.41
[0.410]
129.39
±1
.59
5.09
4±
0.063
[]
108.7
2±
1.59
4.280
±0
.063
[]
86.7
6±
1.59
3.416
±0
.063
[]
6.35
±0
.15
0.25
0±
0.006
[]
50.80
±
Ø0
.381
2.000
±0
.015
[]
50.80
±
Ø0
.381
2.000
±0
.015
[]
6.35
±0
.15
0.25
0±
0.006
[]
63.50
±
Ø0
.381
2.500
±0
.015
[]
9.53
±0
.15
0.375
±0
.006
[]
38.10
±0
.89
1.500
±0
.035
[]
13.4
6
[0.530]
180.09
±1
.59
7.090
±0
.063
[]
156.4
7±
1.59
6.16
0±
0.06
3
[]
89.67
±1
.59
3.53
0±
0.063
[]
72.24
[2.844]
50.80
±0
.89
2.00
0±
0.03
5
[]
13.46
[0.530]
173
.05±
1.59
6.813
±0
.063
[]
142.83
±1
.59
5.623
±0
.063
[]
103.20
±1
.59
4.06
3±
0.063
[]
72.24
[2.844
]
35–100A
125–200A
225–
400A
450–
600A
700–
800A
129.16
±1
.59
5.085
±0
.063
[]
106.30
±1
.59
4.185
±0
.063
[]
88.77
±1
.59
3.495
±0
.063
[]
10.4
1
[0.410]
22.73
±0
.89
0.895
±0
.035
[]
4.75
±0
.15
0.18
7±
0.006
[]
14.29
[0.563]
33.2
7
[1.310]
46.86
[1.845]
21.3
9
[0.842
]
19.18
[0.755
]
3RD AN
GLE
PROJEC
TION
E
OL-L70Q
S000
Littelfus
e
®
RE
VI
SION
DR
WG
NO
.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
9/3/
2015
MA
TL SPEC
FINISH
UN
LESS
OT
HERWIS
E SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRACKETS
[ ] ARE INCH
ES DIME
NS
IONING
AND DO
NOT INCL
UD
E PLATING. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-199
4
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIONS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACTERIST
IC TH
AT
PROVID
ES AN INDICA
TION
OF
PROC
ESS
PERFOR
MA
NCE. PR
OC
ED
UR
E FOR ME
ASUREM
ENT
AN
D TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIME
NSIONS, -M
INIM
UM
CP
VALU
E
MU
ST BE WI
THIN
TH
E DIME
NSIONAL
LIMITATION
S
SH
OW
N ON
DR
AWING AND INITIALL
Y LOCATE
D TO
ALLOW FOR MA
XIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L70Q
S SERIES
OUTL
INE
NTS
REVISION
REV
DA
TE
DE
SCRIPTION
A
3/23/16
515693G
CP - RE
LEAS
E MR
Y
B
9/6/16
516327E
CP/D - CH
G DA
TA
SHEET REVISION
MR
Y
C
6/6/17
517
424E
CP/D
- REMO
VE DA
TA SH
EET REVISION
MR
Y
D
9/5/17
517727
ECP/D - ADD DI
ME
NSION TO
LERANC
ES MR
Y
E
3/25/19
520556E
CP/D - ADD
BLAD
E TOLE
RANC
ES MR
Y
111.13
±1
.59
4.375
±0
.063
[]
95.2
4±
1.59
3.749
±0
.063
[]
84.
1
2±
1.59
3.31
2±
0.063
[]
73.03
[2.875
]
17.0
2±
0.89
0.670
±0
.035
[]
8.73
[0.344]
Ø2
5.40
±0
.381
1.00
0±
0.01
5
[]
3.18
±0
.15
0.12
5±
0.006
[]
72.2
4
[2.844]
73.03
[2.875]
30.94
±
Ø0
.381
1.218
±0
.015
[]
38.10
±0
.89
1.500
±0
.035
[]
10.41
[0.410]
129.39
±1
.59
5.09
4±
0.063
[]
108.7
2±
1.59
4.280
±0
.063
[]
86.7
6±
1.59
3.416
±0
.063
[]
6.35
±0
.15
0.25
0±
0.006
[]
50.80
±
Ø0
.381
2.000
±0
.015
[]
50.80
±
Ø0
.381
2.000
±0
.015
[]
6.35
±0
.15
0.25
0±
0.006
[]
63.50
±
Ø0
.381
2.500
±0
.015
[]
9.53
±0
.15
0.375
±0
.006
[]
38.10
±0
.89
1.500
±0
.035
[]
13.4
6
[0.530]
180.09
±1
.59
7.090
±0
.063
[]
156.4
7±
1.59
6.16
0±
0.06
3
[]
89.67
±1
.59
3.53
0±
0.063
[]
72.24
[2.844]
50.80
±0
.89
2.00
0±
0.03
5
[]
13.46
[0.530]
173
.05±
1.59
6.813
±0
.063
[]
142.83
±1
.59
5.623
±0
.063
[]
103.20
±1
.59
4.06
3±
0.063
[]
72.24
[2.844
]
35–100A
125–200A
225–
400A
450–
600A
700–
800A
129.16
±1
.59
5.085
±0
.063
[]
106.30
±1
.59
4.185
±0
.063
[]
88.77
±1
.59
3.495
±0
.063
[]
10.4
1
[0.410]
22.73
±0
.89
0.895
±0
.035
[]
4.75
±0
.15
0.18
7±
0.006
[]
14.29
[0.563]
33.2
7
[1.310]
46.86
[1.845]
21.3
9
[0.842
]
19.18
[0.755
]
3RD AN
GLE
PROJEC
TION
E
OL-L70Q
S000
Littelfus
e
®
RE
VI
SION
DR
WG
NO
.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
9/3/
2015
MA
TL SPEC
FINISH
UN
LESS
OT
HERWIS
E SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRACKETS
[ ] ARE INCH
ES DIME
NS
IONING
AND DO
NOT INCL
UD
E PLATING. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-199
4
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIONS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACTERIST
IC TH
AT
PROVID
ES AN INDICA
TION
OF
PROC
ESS
PERFOR
MA
NCE. PR
OC
ED
UR
E FOR ME
ASUREM
ENT
AN
D TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIME
NSIONS, -M
INIM
UM
CP
VALU
E
MU
ST BE WI
THIN
TH
E DIME
NSIONAL
LIMITATION
S
SH
OW
N ON
DR
AWING AND INITIALL
Y LOCATE
D TO
ALLOW FOR MA
XIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L70Q
S SERIES
OUTL
INE
NTS
REVISION
REV
DA
TE
DE
SCRIPTION
A
3/23/16
515693G
CP - RE
LEAS
E MR
Y
B
9/6/16
516327E
CP/D - CH
G DA
TA
SHEET REVISION
MR
Y
C
6/6/17
517
424E
CP/D
- REMO
VE DA
TA SH
EET REVISION
MR
Y
D
9/5/17
517727
ECP/D - ADD DI
ME
NSION TO
LERANC
ES MR
Y
E
3/25/19
520556E
CP/D - ADD
BLAD
E TOLE
RANC
ES MR
Y
111.13
±1
.59
4.375
±0
.063
[]
95.2
4±
1.59
3.749
±0
.063
[]
84.
1
2±
1.59
3.31
2±
0.063
[]
73.03
[2.875
]
17.0
2±
0.89
0.670
±0
.035
[]
8.73
[0.344]
Ø2
5.40
±0
.381
1.00
0±
0.01
5
[]
3.18
±0
.15
0.12
5±
0.006
[]
72.2
4
[2.844]
73.03
[2.875]
30.94
±
Ø0
.381
1.218
±0
.015
[]
38.10
±0
.89
1.500
±0
.035
[]
10.41
[0.410]
129.39
±1
.59
5.09
4±
0.063
[]
108.7
2±
1.59
4.280
±0
.063
[]
86.7
6±
1.59
3.416
±0
.063
[]
6.35
±0
.15
0.25
0±
0.006
[]
50.80
±
Ø0
.381
2.000
±0
.015
[]
50.80
±
Ø0
.381
2.000
±0
.015
[]
6.35
±0
.15
0.25
0±
0.006
[]
63.50
±
Ø0
.381
2.500
±0
.015
[]
9.53
±0
.15
0.375
±0
.006
[]
38.10
±0
.89
1.500
±0
.035
[]
13.4
6
[0.530]
180.09
±1
.59
7.090
±0
.063
[]
156.4
7±
1.59
6.16
0±
0.06
3
[]
89.67
±1
.59
3.53
0±
0.063
[]
72.24
[2.844]
50.80
±0
.89
2.00
0±
0.03
5
[]
13.46
[0.530]
173
.05±
1.59
6.813
±0
.063
[]
142.83
±1
.59
5.623
±0
.063
[]
103.20
±1
.59
4.06
3±
0.063
[]
72.24
[2.844
]
35–100A
125–200A
225–
400A
450–
600A
700–
800A
129.16
±1
.59
5.085
±0
.063
[]
106.30
±1
.59
4.185
±0
.063
[]
88.77
±1
.59
3.495
±0
.063
[]
10.4
1
[0.410]
22.73
±0
.89
0.895
±0
.035
[]
4.75
±0
.15
0.18
7±
0.006
[]
14.29
[0.563]
33.2
7
[1.310]
46.86
[1.845]
21.3
9
[0.842
]
19.18
[0.755
]
3RD AN
GLE
PROJEC
TION
E
OL-L70Q
S000
Littelfus
e
®
RE
VI
SION
DR
WG
NO
.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
9/3/
2015
MA
TL SPEC
FINISH
UN
LESS
OT
HERWIS
E SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRACKETS
[ ] ARE INCH
ES DIME
NS
IONING
AND DO
NOT INCL
UD
E PLATING. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-199
4
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIONS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACTERIST
IC TH
AT
PROVID
ES AN INDICA
TION
OF
PROC
ESS
PERFOR
MA
NCE. PR
OC
ED
UR
E FOR ME
ASUREM
ENT
AN
D TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIME
NSIONS, -M
INIM
UM
CP
VALU
E
MU
ST BE WI
THIN
TH
E DIME
NSIONAL
LIMITATION
S
SH
OW
N ON
DR
AWING AND INITIALL
Y LOCATE
D TO
ALLOW FOR MA
XIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L70Q
S SERIES
OUTL
INE
NTS
REVISION
REV
DA
TE
DE
SCRIPTION
A
3/23/16
515693G
CP - RE
LEAS
E MR
Y
B
9/6/16
516327E
CP/D - CH
G DA
TA
SHEET REVISION
MR
Y
C
6/6/17
517
424E
CP/D
- REMO
VE DA
TA SH
EET REVISION
MR
Y
D
9/5/17
517727
ECP/D - ADD DI
ME
NSION TO
LERANC
ES MR
Y
E
3/25/19
520556E
CP/D - ADD
BLAD
E TOLE
RANC
ES MR
Y
111.13
±1
.59
4.375
±0
.063
[]
95.2
4±
1.59
3.749
±0
.063
[]
84.
1
2±
1.59
3.31
2±
0.063
[]
73.03
[2.875
]
17.0
2±
0.89
0.670
±0
.035
[]
8.73
[0.344]
Ø2
5.40
±0
.381
1.00
0±
0.01
5
[]
3.18
±0
.15
0.12
5±
0.006
[]
72.2
4
[2.844]
73.03
[2.875]
30.94
±
Ø0
.381
1.218
±0
.015
[]
38.10
±0
.89
1.500
±0
.035
[]
10.41
[0.410]
129.39
±1
.59
5.09
4±
0.063
[]
108.7
2±
1.59
4.280
±0
.063
[]
86.7
6±
1.59
3.416
±0
.063
[]
6.35
±0
.15
0.25
0±
0.006
[]
50.80
±
Ø0
.381
2.000
±0
.015
[]
50.80
±
Ø0
.381
2.000
±0
.015
[]
6.35
±0
.15
0.25
0±
0.006
[]
63.50
±
Ø0
.381
2.500
±0
.015
[]
9.53
±0
.15
0.375
±0
.006
[]
38.10
±0
.89
1.500
±0
.035
[]
13.4
6
[0.530]
180.09
±1
.59
7.090
±0
.063
[]
156.4
7±
1.59
6.16
0±
0.06
3
[]
89.67
±1
.59
3.53
0±
0.063
[]
72.24
[2.844]
50.80
±0
.89
2.00
0±
0.03
5
[]
13.46
[0.530]
173
.05±
1.59
6.813
±0
.063
[]
142.83
±1
.59
5.623
±0
.063
[]
103.20
±1
.59
4.06
3±
0.063
[]
72.24
[2.844
]
35–100A
125–200A
225–
400A
450–
600A
700–
800A
129.16
±1
.59
5.085
±0
.063
[]
106.30
±1
.59
4.185
±0
.063
[]
88.77
±1
.59
3.495
±0
.063
[]
10.4
1
[0.410]
22.73
±0
.89
0.895
±0
.035
[]
4.75
±0
.15
0.18
7±
0.006
[]
14.29
[0.563]
33.2
7
[1.310]
46.86
[1.845]
21.3
9
[0.842
]
19.18
[0.755
]
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
35 of 68
L70QS SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L50QS
© 2019 Littelfuse, Inc.
Rev: 073119
1 of 12
POWR-
SPEED
®
Fuse
L50QS SERIES HIGH-SPEED ROUND BODY
Specifi cations
Voltage Rating
Ac: 500 V
Dc: 500 V
Amperage Rating
35–800 A
Interrupting Rating
Ac: 200 kA
Dc: 50 kA
Time Constant
10 ms
Material
Body: melamine
Caps: copper alloy (silver plated)
Approvals
UL Recognized (E71611)
cURus (E71611)
Environmental
RoHS Compliant, REACH
Country of Origin
Mexico
Operating Temperature
-55 °C to +125 °C
Storage Temperature
Up to 35 °C with relative humidity <65 %
Description
The L50QS series is a next generation high-speed fuse for
the protection of power semiconductor devices and
is designed in the traditional North American bolted
style package.
L50QS series high-speed fuses are extremely current
limiting and are used to protect power converters, drives
and control circuit applications. Designed with lower I
2
t
performance characteristics, these fuses provide balanced
performance to extend longevity while lowering potentially
damaging heat energy to the devices being protected.
In addition L50QS series fuses have been designed with a
universal mounting option to meet customer requirements
for installation into a variety of application configurations
Littelfuse POWR-
SPEED
products offer optimized
circuit protection at the extremely fast speed required to
protect modern day, sensitive, high-power semiconductor
devices. Such products are commonly found in various
industries including pulp and paper industries, cranes and
heavy-lifting equipment, processing industries, wastewater
treatment plants and large factories and MRO facilities.
Features
Compliance with US and Canadian requirements
Traditional North American bolted style dimensions
Class aR performance
Direct bus-bar mount or stud mount design
Halogen free, RoHS and REACH Compliant
Applications
Power converters (inverters, rectifi ers)
Power supplies
UPS
Variable speed drives
Control circuits
Soft starters
Recommended Fuse Blocks
LSCR001 (35
–
200A)
LSCR002 (225
–
800A)
500 V ac/dc • Very Fast Acting • 35–800 A
Part Numbering System
L50 QS 500 X
Body Type
Ampere Code
Series
Package Quantity
X = 1 (450–800 A)
V = 5 (125–400 A)
T = 10 (35–100 A)
SERIES
BODY
TYPE
AMPERE
CODE
PACKAGE
QUANTITY
CATALOG
NUMBER
ORDERING
NUMBER
L50
QS
500
1
L50QS500
L50QS500.X
Web Resources
Download technical documents:
Littelfuse.com/L50QS
Note: high-speed fuses are designed for fi xed installations. They are not
intended for use in moving vehicle applications.
HF
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
36 of 68
L50QS SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L50QS
© 2019 Littelfuse, Inc.
Rev: 073119
2 of 12
POWR-
SPEED
®
Fuse
L50QS SERIES HIGH-SPEED ROUND BODY
Electrical Specifi cations
CATALOG
NUMBER
AMPERAGE
RATING
VOLTAGE
RATING
INTERRUPT
RATING
MELTING
(PRE-ARC)
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
WATTS LOSS
AT 80 % RATED
CURRENT
WATTS LOSS
AT 100 % RATED
CURRENT
AC
DC
AC
DC
200 KA @ 500 V AC
50 KA @ 500 V DC
(W)
(W)
L50QS035
35
500
500
200 kA
50 kA
111
430
290
3
5
L50QS040
40
500
500
200 kA
50 kA
137
530
363
3
9
L50QS050
50
500
500
200 kA
50 kA
211
770
516
5
8
L50QS060
60
500
500
200 kA
50 kA
269
1,500
881
5
9
L50QS070
70
500
500
200 kA
50 kA
393
1,7 75
1,18 5
6
11
L50QS080
80
500
500
200 kA
50 kA
616
3,550
1,72 0
6
11
L50QS090
90
500
500
200 kA
50 kA
720
4,075
1,9 9 0
8
14
L50QS100
100
500
500
200 kA
50 kA
905
4,577
2,313
9
17
L50QS125
125
500
500
200 kA
50 kA
1,503
7, 6 5 5
4,815
10
17
L50QS150
150
500
500
200 kA
50 kA
2,382
11,10 0
7,19 0
12
21
L50QS175
175
500
500
200 kA
50 kA
3,14 8
16,500
9,900
14
25
L50QS200
200
500
500
200 kA
50 kA
4,10 2
18,233
11, 5 6 7
17
32
L50QS225
225
500
500
200 kA
50 kA
5,379
25,300
16,700
19
35
L50QS250
250
500
500
200 kA
50 kA
7, 0 9 4
31, 3 5 0
22,500
20
37
L50QS275
275
500
500
200 kA
50 kA
9,655
4 0,175
3 0,17 7
21
39
L50QS300
300
500
500
200 kA
50 kA
11, 24 0
53,800
3 6,15 0
25
46
L50QS325
325
500
500
200 kA
50 kA
13,183
56,250
41,000
27
51
L50QS350
350
500
500
200 kA
50 kA
14,246
68,850
44,800
30
61
L50QS400
400
500
500
200 kA
50 kA
21,15 5
100,300
67,300
33
65
L50QS450
450
500
500
200 kA
50 kA
26,425
121,000
84,650
35
63
L50QS500
500
500
500
200 kA
50 kA
31,747
141,000
103,500
39
72
L50QS600
600
500
500
200 kA
50 kA
43,922
193,500
128,000
49
92
L50QS700
700
500
500
200 kA
50 kA
75,597
314,000
230,000
51
92
L50QS800
800
500
500
200 kA
50 kA
92,717
393,500
280,000
63
117
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
37 of 68
L50QS SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L50QS
© 2019 Littelfuse, Inc.
Rev: 073119
4 of 12
POWR-
SPEED
®
Fuse
L50QS SERIES HIGH-SPEED ROUND BODY
Dimensions
Millimeters [inches]
Stud Size:
M8 (5/16”)
Recommended Torque:
15 Nm (132.76 in-lb)
Stud Size:
M8 (5/16”)
Recommended Torque:
15 Nm (132.76 in-lb)
Stud Size:
M8 (5/16”)
Recommended Torque:
15 Nm (132.76 in-lb)
Stud Size:
M8 (5/16”)
Recommended Torque:
15 Nm (132.76 in-lb)
Stud Size:
M12 (1/2”)
Recommended Torque:
54 Nm (477.94 in-lb)
Document Number:
OL-L50QS000
CH
ICAG
O, ILLINOIS
60
63
1
3RD AN
GLE
PROJEC
TION
E
OL-L50QS00
0
Littelfuse
®
RE
VI
SION
DR
WG
NO.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
8/28/2
015
H
S
I
N
I
F
C
E
P
S
L
T
A
M
UN
LESS
OT
HERWIS
E SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRAC
KETS
[ ] ARE INCH
ES DIMENS
IONING
AND DO
NOT INCL
UD
E PLATIN G. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-199
4
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIO
NS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACTERIST
IC TH
AT
PROVID
ES AN INDICA
TION
OF
PROC
ESS
PERFOR
MANCE.
PROC
ED
UR
E FOR ME
ASUREM
ENT
AND
TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIMENS
IONS, -MINIM
UM
CP VA
LUE
MU
ST BE WI
THIN
THE
DIMENS
IONAL
LIMITATION
S
SH
OW
N ON
DRAWING AN
D INITIA
LLY LOCATE
D TO
ALLOW FOR MAXIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L50Q
S SERIES
OUTL
INE
NTS
REVISIO
N
REV
DATE
DE
SCRIPT
ION
A
3/23/16
515693
GC
P - RE
LEAS
E MR
Y
B
Y
R
M
N
O
I
S
I
V
E
R
T
E
E
H
S
A
T
A
D
G
H
C
-
D
/
P
C
E
7
2
3
6
1
5
6
1
/
6
/
9
C
6/6/17
517
424
ECP/D - REMO
VE DATA SH
EET REVISION
MR
Y
D
9/5/17
517727EC
P/D - ADD DI
ME
NSION TO
LERANC
ES MR
Y
E
Y
R
M
S
E
C
N
A
R
E
L
O
T
E
D
A
L
B
D
D
A
-
D
/
P
C
E
6
5
5
0
2
5
9
1
/
5
2
/
3
17.
02
0.89
0.670
0.035
[]
92.08
1.59
3.625
0.063
[]
53.9
8
[2.125]
76.19
1.590
2.999
0.063
[]
65.07
1.59
2.562
0.063
[]
22.7
3
0.89
0.895
0.035
[]
92.0
8
1.60
3.625
0.063
[]
73.8
6
1.60
2.908
0.063
[]
70.3
2
1.60
2.768
0.063
[]
53.9
8
[2.125]
25.2
7
0.89
0.995
0.035
[]
110.3
1
1.60
4.343
0.063
[]
87.3
7
1.60
3.440
0.063
[]
69.8
3
1.60
2.749
0.063
[]
53.1
6
[2.093]
113.4
9
1.60
4.468
0.063
[]
92.8
2
1.60
3.654
0.063
[]
70.8
6
1.60
2.790
0.063
[]
56.3
4
[2.218]
50.8
0
0.89
2.000
0.035
[]
157.1
5
1.60
6.187
0.063
[]
126.9
3
1.60
4.997
0.063
[]
87.3
0
1.60
3.437
0.063
[]
56.3
4
[2.218]
8.73
[0.344]
8.74
[0.344]
10.4
1
[0.410]
10.4
1
[0.410]
13.4
6
[0.530]
3.18
0.15
0.125
0.006
[]
4.75
0.15
0.187
0.006
[]
6.35
0.15
0.250
0.006
[]
6.35
0.15
0.250
0.006
[]
9.53
0.15
0.375
0.006
[]
63.5
0
0.381
2.500
0.015
[]
50.8
0
0.381
2.000
0.015
[]
38.1
0
0.381
1.500
0.015
[]
30.9
4
0.381
1.218
0.015
[]
25.40
0.381
1.000
0.015
[]
38.1
0
0.89
1.500
0.035
[]
35–100A
125–200A
225–4
00A
450–600A
700–800A
14.2
9
[0.563]
10.5
1
[0.414]
19.1
8
[0.755]
21.3
9
[0.842]
33.2
7
[1.3
10]
CH
ICAG
O, ILLINOIS
60
63
1
3RD AN
GLE
PROJEC
TION
E
OL-L50QS00
0
Littelfuse
®
RE
VI
SION
DR
WG
NO.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
8/28/2
015
H
S
I
N
I
F
C
E
P
S
L
T
A
M
UN
LESS
OT
HERWIS
E SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRAC
KETS
[ ] ARE INCH
ES DIMENS
IONING
AND DO
NOT INCL
UD
E PLATIN G. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-199
4
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIO
NS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACTERIST
IC TH
AT
PROVID
ES AN INDICA
TION
OF
PROC
ESS
PERFOR
MANCE.
PROC
ED
UR
E FOR ME
ASUREM
ENT
AND
TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIMENS
IONS, -MINIM
UM
CP VA
LUE
MU
ST BE WI
THIN
THE
DIMENS
IONAL
LIMITATION
S
SH
OW
N ON
DRAWING AN
D INITIA
LLY LOCATE
D TO
ALLOW FOR MAXIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L50Q
S SERIES
OUTL
INE
NTS
REVISIO
N
REV
DATE
DE
SCRIPT
ION
A
3/23/16
515693
GC
P - RE
LEAS
E MR
Y
B
Y
R
M
N
O
I
S
I
V
E
R
T
E
E
H
S
A
T
A
D
G
H
C
-
D
/
P
C
E
7
2
3
6
1
5
6
1
/
6
/
9
C
6/6/17
517
424
ECP/D - REMO
VE DATA SH
EET REVISION
MR
Y
D
9/5/17
517727EC
P/D - ADD DI
ME
NSION TO
LERANC
ES MR
Y
E
Y
R
M
S
E
C
N
A
R
E
L
O
T
E
D
A
L
B
D
D
A
-
D
/
P
C
E
6
5
5
0
2
5
9
1
/
5
2
/
3
17.
02
0.89
0.670
0.035
[]
92.08
1.59
3.625
0.063
[]
53.9
8
[2.125]
76.19
1.590
2.999
0.063
[]
65.07
1.59
2.562
0.063
[]
22.7
3
0.89
0.895
0.035
[]
92.0
8
1.60
3.625
0.063
[]
73.8
6
1.60
2.908
0.063
[]
70.3
2
1.60
2.768
0.063
[]
53.9
8
[2.125]
25.2
7
0.89
0.995
0.035
[]
110.3
1
1.60
4.343
0.063
[]
87.3
7
1.60
3.440
0.063
[]
69.8
3
1.60
2.749
0.063
[]
53.1
6
[2.093]
113.4
9
1.60
4.468
0.063
[]
92.8
2
1.60
3.654
0.063
[]
70.8
6
1.60
2.790
0.063
[]
56.3
4
[2.218]
50.8
0
0.89
2.000
0.035
[]
157.1
5
1.60
6.187
0.063
[]
126.9
3
1.60
4.997
0.063
[]
87.3
0
1.60
3.437
0.063
[]
56.3
4
[2.218]
8.73
[0.344]
8.74
[0.344]
10.4
1
[0.410]
10.4
1
[0.410]
13.4
6
[0.530]
3.18
0.15
0.125
0.006
[]
4.75
0.15
0.187
0.006
[]
6.35
0.15
0.250
0.006
[]
6.35
0.15
0.250
0.006
[]
9.53
0.15
0.375
0.006
[]
63.5
0
0.381
2.500
0.015
[]
50.8
0
0.381
2.000
0.015
[]
38.1
0
0.381
1.500
0.015
[]
30.9
4
0.381
1.218
0.015
[]
25.40
0.381
1.000
0.015
[]
38.1
0
0.89
1.500
0.035
[]
35–100A
125–200A
225–4
00A
450–600A
700–800A
14.2
9
[0.563]
10.5
1
[0.414]
19.1
8
[0.755]
21.3
9
[0.842]
33.2
7
[1.3
10]
CH
ICAG
O, ILLINOIS
60
63
1
3RD AN
GLE
PROJEC
TION
E
OL-L50QS00
0
Littelfuse
®
RE
VI
SION
DR
WG
NO.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
8/28/2
015
H
S
I
N
I
F
C
E
P
S
L
T
A
M
UN
LESS
OT
HERWIS
E SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRAC
KETS
[ ] ARE INCH
ES DIMENS
IONING
AND DO
NOT INCL
UD
E PLATIN G. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-199
4
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIO
NS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACTERIST
IC TH
AT
PROVID
ES AN INDICA
TION
OF
PROC
ESS
PERFOR
MANCE.
PROC
ED
UR
E FOR ME
ASUREM
ENT
AND
TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIMENS
IONS, -MINIM
UM
CP VA
LUE
MU
ST BE WI
THIN
THE
DIMENS
IONAL
LIMITATION
S
SH
OW
N ON
DRAWING AN
D INITIA
LLY LOCATE
D TO
ALLOW FOR MAXIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L50Q
S SERIES
OUTL
INE
NTS
REVISIO
N
REV
DATE
DE
SCRIPT
ION
A
3/23/16
515693
GC
P - RE
LEAS
E MR
Y
B
Y
R
M
N
O
I
S
I
V
E
R
T
E
E
H
S
A
T
A
D
G
H
C
-
D
/
P
C
E
7
2
3
6
1
5
6
1
/
6
/
9
C
6/6/17
517
424
ECP/D - REMO
VE DATA SH
EET REVISION
MR
Y
D
9/5/17
517727EC
P/D - ADD DI
ME
NSION TO
LERANC
ES MR
Y
E
Y
R
M
S
E
C
N
A
R
E
L
O
T
E
D
A
L
B
D
D
A
-
D
/
P
C
E
6
5
5
0
2
5
9
1
/
5
2
/
3
17.
02
0.89
0.670
0.035
[]
92.08
1.59
3.625
0.063
[]
53.9
8
[2.125]
76.19
1.590
2.999
0.063
[]
65.07
1.59
2.562
0.063
[]
22.7
3
0.89
0.895
0.035
[]
92.0
8
1.60
3.625
0.063
[]
73.8
6
1.60
2.908
0.063
[]
70.3
2
1.60
2.768
0.063
[]
53.9
8
[2.125]
25.2
7
0.89
0.995
0.035
[]
110.3
1
1.60
4.343
0.063
[]
87.3
7
1.60
3.440
0.063
[]
69.8
3
1.60
2.749
0.063
[]
53.1
6
[2.093]
113.4
9
1.60
4.468
0.063
[]
92.8
2
1.60
3.654
0.063
[]
70.8
6
1.60
2.790
0.063
[]
56.3
4
[2.218]
50.8
0
0.89
2.000
0.035
[]
157.1
5
1.60
6.187
0.063
[]
126.9
3
1.60
4.997
0.063
[]
87.3
0
1.60
3.437
0.063
[]
56.3
4
[2.218]
8.73
[0.344]
8.74
[0.344]
10.4
1
[0.410]
10.4
1
[0.410]
13.4
6
[0.530]
3.18
0.15
0.125
0.006
[]
4.75
0.15
0.187
0.006
[]
6.35
0.15
0.250
0.006
[]
6.35
0.15
0.250
0.006
[]
9.53
0.15
0.375
0.006
[]
63.5
0
0.381
2.500
0.015
[]
50.8
0
0.381
2.000
0.015
[]
38.1
0
0.381
1.500
0.015
[]
30.9
4
0.381
1.218
0.015
[]
25.40
0.381
1.000
0.015
[]
38.1
0
0.89
1.500
0.035
[]
35–100A
125–200A
225–4
00A
450–600A
700–800A
14.2
9
[0.563]
10.5
1
[0.414]
19.1
8
[0.755]
21.3
9
[0.842]
33.2
7
[1.3
10]
CH
ICAG
O, ILLINOIS
60
63
1
3RD AN
GLE
PROJEC
TION
E
OL-L50QS00
0
Littelfuse
®
RE
VI
SION
DR
WG
NO.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
8/28/2
015
H
S
I
N
I
F
C
E
P
S
L
T
A
M
UN
LESS
OT
HERWIS
E SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRAC
KETS
[ ] ARE INCH
ES DIMENS
IONING
AND DO
NOT INCL
UD
E PLATIN G. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-199
4
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIO
NS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACTERIST
IC TH
AT
PROVID
ES AN INDICA
TION
OF
PROC
ESS
PERFOR
MANCE.
PROC
ED
UR
E FOR ME
ASUREM
ENT
AND
TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIMENS
IONS, -MINIM
UM
CP VA
LUE
MU
ST BE WI
THIN
THE
DIMENS
IONAL
LIMITATION
S
SH
OW
N ON
DRAWING AN
D INITIA
LLY LOCATE
D TO
ALLOW FOR MAXIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L50Q
S SERIES
OUTL
INE
NTS
REVISIO
N
REV
DATE
DE
SCRIPT
ION
A
3/23/16
515693
GC
P - RE
LEAS
E MR
Y
B
Y
R
M
N
O
I
S
I
V
E
R
T
E
E
H
S
A
T
A
D
G
H
C
-
D
/
P
C
E
7
2
3
6
1
5
6
1
/
6
/
9
C
6/6/17
517
424
ECP/D - REMO
VE DATA SH
EET REVISION
MR
Y
D
9/5/17
517727EC
P/D - ADD DI
ME
NSION TO
LERANC
ES MR
Y
E
Y
R
M
S
E
C
N
A
R
E
L
O
T
E
D
A
L
B
D
D
A
-
D
/
P
C
E
6
5
5
0
2
5
9
1
/
5
2
/
3
17.
02
0.89
0.670
0.035
[]
92.08
1.59
3.625
0.063
[]
53.9
8
[2.125]
76.19
1.590
2.999
0.063
[]
65.07
1.59
2.562
0.063
[]
22.7
3
0.89
0.895
0.035
[]
92.0
8
1.60
3.625
0.063
[]
73.8
6
1.60
2.908
0.063
[]
70.3
2
1.60
2.768
0.063
[]
53.9
8
[2.125]
25.2
7
0.89
0.995
0.035
[]
110.3
1
1.60
4.343
0.063
[]
87.3
7
1.60
3.440
0.063
[]
69.8
3
1.60
2.749
0.063
[]
53.1
6
[2.093]
113.4
9
1.60
4.468
0.063
[]
92.8
2
1.60
3.654
0.063
[]
70.8
6
1.60
2.790
0.063
[]
56.3
4
[2.218]
50.8
0
0.89
2.000
0.035
[]
157.1
5
1.60
6.187
0.063
[]
126.9
3
1.60
4.997
0.063
[]
87.3
0
1.60
3.437
0.063
[]
56.3
4
[2.218]
8.73
[0.344]
8.74
[0.344]
10.4
1
[0.410]
10.4
1
[0.410]
13.4
6
[0.530]
3.18
0.15
0.125
0.006
[]
4.75
0.15
0.187
0.006
[]
6.35
0.15
0.250
0.006
[]
6.35
0.15
0.250
0.006
[]
9.53
0.15
0.375
0.006
[]
63.5
0
0.381
2.500
0.015
[]
50.8
0
0.381
2.000
0.015
[]
38.1
0
0.381
1.500
0.015
[]
30.9
4
0.381
1.218
0.015
[]
25.40
0.381
1.000
0.015
[]
38.1
0
0.89
1.500
0.035
[]
35–100A
125–200A
225–4
00A
450–600A
700–800A
14.2
9
[0.563]
10.5
1
[0.414]
19.1
8
[0.755]
21.3
9
[0.842]
33.2
7
[1.3
10]
CH
ICAG
O, ILLINOIS
60
63
1
3RD AN
GLE
PROJEC
TION
E
OL-L50QS00
0
Littelfuse
®
RE
VI
SION
DR
WG
NO.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
8/28/2
015
H
S
I
N
I
F
C
E
P
S
L
T
A
M
UN
LESS
OT
HERWIS
E SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRAC
KETS
[ ] ARE INCH
ES DIMENS
IONING
AND DO
NOT INCL
UD
E PLATIN G. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-199
4
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIO
NS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACTERIST
IC TH
AT
PROVID
ES AN INDICA
TION
OF
PROC
ESS
PERFOR
MANCE.
PROC
ED
UR
E FOR ME
ASUREM
ENT
AND
TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIMENS
IONS, -MINIM
UM
CP VA
LUE
MU
ST BE WI
THIN
THE
DIMENS
IONAL
LIMITATION
S
SH
OW
N ON
DRAWING AN
D INITIA
LLY LOCATE
D TO
ALLOW FOR MAXIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L50Q
S SERIES
OUTL
INE
NTS
REVISIO
N
REV
DATE
DE
SCRIPT
ION
A
3/23/16
515693
GC
P - RE
LEAS
E MR
Y
B
Y
R
M
N
O
I
S
I
V
E
R
T
E
E
H
S
A
T
A
D
G
H
C
-
D
/
P
C
E
7
2
3
6
1
5
6
1
/
6
/
9
C
6/6/17
517
424
ECP/D - REMO
VE DATA SH
EET REVISION
MR
Y
D
9/5/17
517727EC
P/D - ADD DI
ME
NSION TO
LERANC
ES MR
Y
E
Y
R
M
S
E
C
N
A
R
E
L
O
T
E
D
A
L
B
D
D
A
-
D
/
P
C
E
6
5
5
0
2
5
9
1
/
5
2
/
3
17.
02
0.89
0.670
0.035
[]
92.08
1.59
3.625
0.063
[]
53.9
8
[2.125]
76.19
1.590
2.999
0.063
[]
65.07
1.59
2.562
0.063
[]
22.7
3
0.89
0.895
0.035
[]
92.0
8
1.60
3.625
0.063
[]
73.8
6
1.60
2.908
0.063
[]
70.3
2
1.60
2.768
0.063
[]
53.9
8
[2.125]
25.2
7
0.89
0.995
0.035
[]
110.3
1
1.60
4.343
0.063
[]
87.3
7
1.60
3.440
0.063
[]
69.8
3
1.60
2.749
0.063
[]
53.1
6
[2.093]
113.4
9
1.60
4.468
0.063
[]
92.8
2
1.60
3.654
0.063
[]
70.8
6
1.60
2.790
0.063
[]
56.3
4
[2.218]
50.8
0
0.89
2.000
0.035
[]
157.1
5
1.60
6.187
0.063
[]
126.9
3
1.60
4.997
0.063
[]
87.3
0
1.60
3.437
0.063
[]
56.3
4
[2.218]
8.73
[0.344]
8.74
[0.344]
10.4
1
[0.410]
10.4
1
[0.410]
13.4
6
[0.530]
3.18
0.15
0.125
0.006
[]
4.75
0.15
0.187
0.006
[]
6.35
0.15
0.250
0.006
[]
6.35
0.15
0.250
0.006
[]
9.53
0.15
0.375
0.006
[]
63.5
0
0.381
2.500
0.015
[]
50.8
0
0.381
2.000
0.015
[]
38.1
0
0.381
1.500
0.015
[]
30.9
4
0.381
1.218
0.015
[]
25.40
0.381
1.000
0.015
[]
38.1
0
0.89
1.500
0.035
[]
35–100A
125–200A
225–4
00A
450–600A
700–800A
14.2
9
[0.563]
10.5
1
[0.414]
19.1
8
[0.755]
21.3
9
[0.842]
33.2
7
[1.3
10]
CH
ICAG
O, ILLINOIS
60
63
1
3RD AN
GLE
PROJEC
TION
E
OL-L50QS00
0
Littelfuse
®
RE
VI
SION
DR
WG
NO.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
8/28/2
015
H
S
I
N
I
F
C
E
P
S
L
T
A
M
UN
LESS
OT
HERWIS
E SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRAC
KETS
[ ] ARE INCH
ES DIMENS
IONING
AND DO
NOT INCL
UD
E PLATIN G. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-199
4
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIO
NS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACTERIST
IC TH
AT
PROVID
ES AN INDICA
TION
OF
PROC
ESS
PERFOR
MANCE.
PROC
ED
UR
E FOR ME
ASUREM
ENT
AND
TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIMENS
IONS, -MINIM
UM
CP VA
LUE
MU
ST BE WI
THIN
THE
DIMENS
IONAL
LIMITATION
S
SH
OW
N ON
DRAWING AN
D INITIA
LLY LOCATE
D TO
ALLOW FOR MAXIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L50Q
S SERIES
OUTL
INE
NTS
REVISIO
N
REV
DATE
DE
SCRIPT
ION
A
3/23/16
515693
GC
P - RE
LEAS
E MR
Y
B
Y
R
M
N
O
I
S
I
V
E
R
T
E
E
H
S
A
T
A
D
G
H
C
-
D
/
P
C
E
7
2
3
6
1
5
6
1
/
6
/
9
C
6/6/17
517
424
ECP/D - REMO
VE DATA SH
EET REVISION
MR
Y
D
9/5/17
517727EC
P/D - ADD DI
ME
NSION TO
LERANC
ES MR
Y
E
Y
R
M
S
E
C
N
A
R
E
L
O
T
E
D
A
L
B
D
D
A
-
D
/
P
C
E
6
5
5
0
2
5
9
1
/
5
2
/
3
17.
02
0.89
0.670
0.035
[]
92.08
1.59
3.625
0.063
[]
53.9
8
[2.125]
76.19
1.590
2.999
0.063
[]
65.07
1.59
2.562
0.063
[]
22.7
3
0.89
0.895
0.035
[]
92.0
8
1.60
3.625
0.063
[]
73.8
6
1.60
2.908
0.063
[]
70.3
2
1.60
2.768
0.063
[]
53.9
8
[2.125]
25.2
7
0.89
0.995
0.035
[]
110.3
1
1.60
4.343
0.063
[]
87.3
7
1.60
3.440
0.063
[]
69.8
3
1.60
2.749
0.063
[]
53.1
6
[2.093]
113.4
9
1.60
4.468
0.063
[]
92.8
2
1.60
3.654
0.063
[]
70.8
6
1.60
2.790
0.063
[]
56.3
4
[2.218]
50.8
0
0.89
2.000
0.035
[]
157.1
5
1.60
6.187
0.063
[]
126.9
3
1.60
4.997
0.063
[]
87.3
0
1.60
3.437
0.063
[]
56.3
4
[2.218]
8.73
[0.344]
8.74
[0.344]
10.4
1
[0.410]
10.4
1
[0.410]
13.4
6
[0.530]
3.18
0.15
0.125
0.006
[]
4.75
0.15
0.187
0.006
[]
6.35
0.15
0.250
0.006
[]
6.35
0.15
0.250
0.006
[]
9.53
0.15
0.375
0.006
[]
63.5
0
0.381
2.500
0.015
[]
50.8
0
0.381
2.000
0.015
[]
38.1
0
0.381
1.500
0.015
[]
30.9
4
0.381
1.218
0.015
[]
25.40
0.381
1.000
0.015
[]
38.1
0
0.89
1.500
0.035
[]
35–100A
125–200A
225–4
00A
450–600A
700–800A
14.2
9
[0.563]
10.5
1
[0.414]
19.1
8
[0.755]
21.3
9
[0.842]
33.2
7
[1.3
10]
CH
ICAG
O, ILLINOIS
60
63
1
3RD AN
GLE
PROJEC
TION
E
OL-L50QS00
0
Littelfuse
®
RE
VI
SION
DR
WG
NO.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
8/28/2
015
H
S
I
N
I
F
C
E
P
S
L
T
A
M
UN
LESS
OT
HERWIS
E SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRAC
KETS
[ ] ARE INCH
ES DIMENS
IONING
AND DO
NOT INCL
UD
E PLATIN G. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-199
4
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIO
NS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACTERIST
IC TH
AT
PROVID
ES AN INDICA
TION
OF
PROC
ESS
PERFOR
MANCE.
PROC
ED
UR
E FOR ME
ASUREM
ENT
AND
TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIMENS
IONS, -MINIM
UM
CP VA
LUE
MU
ST BE WI
THIN
THE
DIMENS
IONAL
LIMITATION
S
SH
OW
N ON
DRAWING AN
D INITIA
LLY LOCATE
D TO
ALLOW FOR MAXIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L50Q
S SERIES
OUTL
INE
NTS
REVISIO
N
REV
DATE
DE
SCRIPT
ION
A
3/23/16
515693
GC
P - RE
LEAS
E MR
Y
B
Y
R
M
N
O
I
S
I
V
E
R
T
E
E
H
S
A
T
A
D
G
H
C
-
D
/
P
C
E
7
2
3
6
1
5
6
1
/
6
/
9
C
6/6/17
517
424
ECP/D - REMO
VE DATA SH
EET REVISION
MR
Y
D
9/5/17
517727EC
P/D - ADD DI
ME
NSION TO
LERANC
ES MR
Y
E
Y
R
M
S
E
C
N
A
R
E
L
O
T
E
D
A
L
B
D
D
A
-
D
/
P
C
E
6
5
5
0
2
5
9
1
/
5
2
/
3
17.
02
0.89
0.670
0.035
[]
92.08
1.59
3.625
0.063
[]
53.9
8
[2.125]
76.19
1.590
2.999
0.063
[]
65.07
1.59
2.562
0.063
[]
22.7
3
0.89
0.895
0.035
[]
92.0
8
1.60
3.625
0.063
[]
73.8
6
1.60
2.908
0.063
[]
70.3
2
1.60
2.768
0.063
[]
53.9
8
[2.125]
25.2
7
0.89
0.995
0.035
[]
110.3
1
1.60
4.343
0.063
[]
87.3
7
1.60
3.440
0.063
[]
69.8
3
1.60
2.749
0.063
[]
53.1
6
[2.093]
113
.49
1.60
4.468
0.063
[]
92.8
2
1.60
3.654
0.063
[]
70.8
6
1.60
2.790
0.063
[]
56.3
4
[2.218]
50.8
0
0.89
2.000
0.035
[]
157.1
5
1.60
6.187
0.063
[]
126.9
3
1.60
4.997
0.063
[]
87.3
0
1.60
3.437
0.063
[]
56.3
4
[2.218]
8.73
[0.344]
8.74
[0.344]
10.4
1
[0.410]
10.4
1
[0.410]
13.4
6
[0.530]
3.18
0.15
0.125
0.006
[]
4.75
0.15
0.187
0.006
[]
6.35
0.15
0.250
0.006
[]
6.35
0.15
0.250
0.006
[]
9.53
0.15
0.375
0.006
[]
63.5
0
0.381
2.500
0.015
[]
50.8
0
0.381
2.000
0.015
[]
38.1
0
0.381
1.500
0.015
[]
30.9
4
0.381
1.218
0.015
[]
25.40
0.381
1.000
0.015
[]
38.1
0
0.89
1.500
0.035
[]
35–100A
125–200A
225–4
00A
450–600A
700–800A
14.2
9
[0.563]
10.5
1
[0.414]
19.1
8
[0.755]
21.3
9
[0.842]
33.2
7
[1.3
10]
CH
ICAG
O, ILLINOIS
60
63
1
3RD AN
GLE
PROJEC
TION
E
OL-L50QS00
0
Littelfuse
®
RE
VI
SION
DR
WG
NO.
TITL
E
C
DR
WD
ATE
GR
AM
S/PIECE
FINISH GO
OD
WT
MY
OR
K
8/28/2
015
H
S
I
N
I
F
C
E
P
S
L
T
A
M
UN
LESS
OT
HERWIS
E SP
ECIFIED,
DIME
NSIONS AR
E IN
MILLIMETERS,
DIME
NSIONS
IN
BRAC
KETS
[ ] ARE INCH
ES DIMENS
IONING
AND DO
NOT INCL
UD
E PLATIN G. TO
LERANCIN
G
TO
BE
INTE
RPRETED IN
ACCO
RD
ANCE
WI
TH
ANSI
Y14.
5M
-199
4
DE
NOTES CRITICAL
CH
ARACTERIST
ICS.
DE
NOTES CP
K DIME
NSIO
NS,
-MINIM
UM
CPK VALU
E
DE
NOTES A
CH
ARACTERIST
IC TH
AT
PROVID
ES AN INDICA
TION
OF
PROC
ESS
PERFOR
MANCE.
PROC
ED
UR
E FOR ME
ASUREM
ENT
AND
TRAC
KING
TO
BE DE
FINED IN
LITTELFUSE INSPECTION
INSTRU
CTIONS.
DE
NOTES CP
DIMENS
IONS, -MINIM
UM
CP VA
LUE
MU
ST BE WI
THIN
THE
DIMENS
IONAL
LIMITATION
S
SH
OW
N ON
DRAWING AN
D INITIA
LLY LOCATE
D TO
ALLOW FOR MAXIMU
M TO
OL LIFE.
CPK
CP
SHEET 1 OF 1
SCALE
L50Q
S SERIES
OUTL
INE
NTS
REVISIO
N
REV
DATE
DE
SCRIPT
ION
A
3/23/16
515693
GC
P - RE
LEAS
E MR
Y
B
Y
R
M
N
O
I
S
I
V
E
R
T
E
E
H
S
A
T
A
D
G
H
C
-
D
/
P
C
E
7
2
3
6
1
5
6
1
/
6
/
9
C
6/6/17
517
424
ECP/D - REMO
VE DATA SH
EET REVISION
MR
Y
D
9/5/17
517727EC
P/D - ADD DI
ME
NSION TO
LERANC
ES MR
Y
E
Y
R
M
S
E
C
N
A
R
E
L
O
T
E
D
A
L
B
D
D
A
-
D
/
P
C
E
6
5
5
0
2
5
9
1
/
5
2
/
3
17.
02
0.89
0.670
0.035
[]
92.08
1.59
3.625
0.063
[]
53.9
8
[2.125]
76.19
1.590
2.999
0.063
[]
65.07
1.59
2.562
0.063
[]
22.7
3
0.89
0.895
0.035
[]
92.0
8
1.60
3.625
0.063
[]
73.8
6
1.60
2.908
0.063
[]
70.3
2
1.60
2.768
0.063
[]
53.9
8
[2.125]
25.2
7
0.89
0.995
0.035
[]
110.3
1
1.60
4.343
0.063
[]
87.3
7
1.60
3.440
0.063
[]
69.8
3
1.60
2.749
0.063
[]
53.1
6
[2.093]
113.4
9
1.60
4.468
0.063
[]
92.8
2
1.60
3.654
0.063
[]
70.8
6
1.60
2.790
0.063
[]
56.3
4
[2.218]
50.8
0
0.89
2.000
0.035
[]
157.1
5
1.60
6.187
0.063
[]
126.9
3
1.60
4.997
0.063
[]
87.3
0
1.60
3.437
0.063
[]
56.3
4
[2.218]
8.73
[0.344]
8.74
[0.344]
10.4
1
[0.410]
10.4
1
[0.410]
13.4
6
[0.530]
3.18
0.15
0.125
0.006
[]
4.75
0.15
0.187
0.006
[]
6.35
0.15
0.250
0.006
[]
6.35
0.15
0.250
0.006
[]
9.53
0.15
0.375
0.006
[]
63.5
0
0.381
2.500
0.015
[]
50.8
0
0.381
2.000
0.015
[]
38.1
0
0.381
1.500
0.015
[]
30.9
4
0.381
1.218
0.015
[]
25.40
0.381
1.000
0.015
[]
38.1
0
0.89
1.500
0.035
[]
35–100A
125–200A
225–4
00A
450–600A
700–800A
14.2
9
[0.563]
10.5
1
[0.414]
19.1
8
[0.755]
21.3
9
[0.842]
33.2
7
[1.3
10]
Littelfuse.com/L50QS
© 2019 Littelfuse, Inc.
Rev: 073119
3 of 12
POWR-
SPEED
®
Fuse
L50QS SERIES HIGH-SPEED ROUND BODY
SERIES
AMPERAGE
RATING
AMPERE
CODE
CATALOG
NUMBER
ORDERING
NUMBER
PACK
QUANTITY
UPC
L50QS
35
035
L50QS035
L50QS035.T
10 Pcs/ Box
07945885991
L50QS
40
040
L50QS040
L50QS040.T
10 Pcs/ Box
07945885992
L50QS
50
050
L50QS050
L50QS050.T
10 Pcs/ Box
07945885993
L50QS
60
060
L50QS060
L50QS060.T
10 Pcs/ Box
07945885994
L50QS
70
070
L50QS070
L50QS070.T
10 Pcs/ Box
07945885995
L50QS
80
080
L50QS080
L50QS080.T
10 Pcs/ Box
07945885996
L50QS
90
090
L50QS090
L50QS090.T
10 Pcs/ Box
07945885997
L50QS
100
100
L50QS100
L50QS100.T
10 Pcs/ Box
07945885998
L50QS
125
125
L50QS125
L50QS125.V
5 Pcs/ Box
07945885999
L50QS
150
150
L50QS150
L50QS150.V
5 Pcs/ Box
07945886000
L50QS
175
175
L50QS175
L50QS175.V
5 Pcs/ Box
07945886001
L50QS
200
200
L50QS200
L50QS200.V
5 Pcs/ Box
07945886002
L50QS
225
225
L50QS225
L50QS225.V
5 Pcs/ Box
07945886003
L50QS
250
250
L50QS250
L50QS250.V
5 Pcs/ Box
07945886004
L50QS
275
275
L50QS275
L50QS275.V
5 Pcs/ Box
07945886005
L50QS
300
300
L50QS300
L50QS300.V
5 Pcs/ Box
07945886006
L50QS
325
325
L50QS325
L50QS325.V
5 Pcs/ Box
07945886011
L50QS
350
350
L50QS350
L50QS350.V
5 Pcs/ Box
07945886007
L50QS
400
400
L50QS400
L50QS400.V
5 Pcs/ Box
07945886008
L50QS
450
450
L50QS450
L50QS450.X
1 Pc/ Box
07945886009
L50QS
500
500
L50QS500
L50QS500.X
1 Pc/ Box
07945886010
L50QS
600
600
L50QS600
L50QS600.X
1 Pc/ Box
07945886012
L50QS
700
700
L50QS700
L50QS700.X
1 Pc/ Box
07945886013
L50QS
800
800
L50QS800
L50QS800.X
1 Pc/ Box
07945886014
Ordering Information
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
38 of 68
L50QS SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L50QS
© 2019 Littelfuse, Inc.
Rev: 073119
3 of 12
POWR-
SPEED
®
Fuse
L50QS SERIES HIGH-SPEED ROUND BODY
SERIES
AMPERAGE
RATING
AMPERE
CODE
CATALOG
NUMBER
ORDERING
NUMBER
PACK
QUANTITY
UPC
L50QS
35
035
L50QS035
L50QS035.T
10 Pcs/ Box
07945885991
L50QS
40
040
L50QS040
L50QS040.T
10 Pcs/ Box
07945885992
L50QS
50
050
L50QS050
L50QS050.T
10 Pcs/ Box
07945885993
L50QS
60
060
L50QS060
L50QS060.T
10 Pcs/ Box
07945885994
L50QS
70
070
L50QS070
L50QS070.T
10 Pcs/ Box
07945885995
L50QS
80
080
L50QS080
L50QS080.T
10 Pcs/ Box
07945885996
L50QS
90
090
L50QS090
L50QS090.T
10 Pcs/ Box
07945885997
L50QS
100
100
L50QS100
L50QS100.T
10 Pcs/ Box
07945885998
L50QS
125
125
L50QS125
L50QS125.V
5 Pcs/ Box
07945885999
L50QS
150
150
L50QS150
L50QS150.V
5 Pcs/ Box
07945886000
L50QS
175
175
L50QS175
L50QS175.V
5 Pcs/ Box
07945886001
L50QS
200
200
L50QS200
L50QS200.V
5 Pcs/ Box
07945886002
L50QS
225
225
L50QS225
L50QS225.V
5 Pcs/ Box
07945886003
L50QS
250
250
L50QS250
L50QS250.V
5 Pcs/ Box
07945886004
L50QS
275
275
L50QS275
L50QS275.V
5 Pcs/ Box
07945886005
L50QS
300
300
L50QS300
L50QS300.V
5 Pcs/ Box
07945886006
L50QS
325
325
L50QS325
L50QS325.V
5 Pcs/ Box
07945886011
L50QS
350
350
L50QS350
L50QS350.V
5 Pcs/ Box
07945886007
L50QS
400
400
L50QS400
L50QS400.V
5 Pcs/ Box
07945886008
L50QS
450
450
L50QS450
L50QS450.X
1 Pc/ Box
07945886009
L50QS
500
500
L50QS500
L50QS500.X
1 Pc/ Box
07945886010
L50QS
600
600
L50QS600
L50QS600.X
1 Pc/ Box
07945886012
L50QS
700
700
L50QS700
L50QS700.X
1 Pc/ Box
07945886013
L50QS
800
800
L50QS800
L50QS800.X
1 Pc/ Box
07945886014
Ordering Information
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
39 of 68
L50QS SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L70S
© 2019 Littelfuse, Inc.
Rev: 073119
1 of 6
POWR-GARD
®
Fuse
L70S SERIES HIGH-SPEED ROUND BODY
Specifi cations
Voltage Rating
700 V ac
650 V dc
Amperage Rating
10, 15, 20, 25, 30, 35, 40, 50, 60, 70, 80,
90, 100, 125, 150, 175, 200, 225, 250, 300,
350, 400, 450, 500, 600, 700, 800
Interrupting Rating
Ac: 200 kAIC
Dc: 20 kAIC
Material
Body: melamine
Terminals: copper (silver plated)
Mounting Type
Cylindrical (10–0 A)
Bolted tags (35–800 A)
Operating Temperature
-55
°C to +125 °C
Storage Temperature
Up to 35 °C with relative humidity < 65 %
Approvals
UL Recognized (File: E71611)
CSA Recognized (File: LR29862)
Environmental
RoHS Compliant
Country of Origin
Mexico
Description
Littelfuse L70S series high-speed fuses are designed
to protect today’s equipment and systems, and are
manufactured with Littelfuse-developed technology that
sets tomorrow’s standards for accuracy, consistent quality,
reliability, and predictable performance.
Littelfuse engineers have redefined high-speed fuse
technology by using advanced metallurgical, polymer,
and materials research, mathematical modeling, and
computerized statistical analysis.
Features/Benefi ts
Extremely current limiting
Low watt losses
Controlled transient over-voltages
UL Recognized
Applications
Ac and dc drives
Dc common bus protection
Power converters
UPS
Soft-starters
Recommended Fuse Block
LSCR001 (35–100 A)
LSCR002 (125–800 A)
Web Resources
Download technical documents:
Littelfuse.com/L70S
Note: high-speed fuses are designed for fi xed installations. They are not
intended for use in moving vehicle applications.
700 V ac • Very Fast Acting • 650 V dc • 10–800 A
SERIES
AMP
CATALOG NUMBER
ORDERING NUMBER
L70S
10
L70S010
L70S010.T
L70S
500
L70S500
L70S500.X
Part Numbering System
L70S xxx .T
Package Quantity
Series
Ampere Code
(3 digit minimum amperage
in decimal form)
Refer to Pack Qty.
Column in Ordering
Information Table
HF
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
40 of 68
L70S SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L70S
© 2019 Littelfuse, Inc.
Rev: 073119
2 of 6
POWR-GARD
®
Fuse
L70S SERIES HIGH-SPEED ROUND BODY
Electrical Specifi cations
CATALOG
NUMBER
AMPERAGE
RATING
VOLTAGE
RATING
INTERRUPT
RATING
MELTING
(PRE-ARC)
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
WATTS LOSS
AT 100 % RATED
CURRENT
WATTS LOSS
AT 80 % RATED
CURRENT
AC
DC
AC
DC
100
kA
@ 700 V AC
200
kA
@ 700 V AC
20
kA
@ 650 V DC
(W)
(W)
L70S010
10
700
650
200 kA
20 kA
21
160
173
346
2
1
L70S015
15
700
650
200 kA
20 kA
34
330
355
270
2
2
L70S020
20
700
650
200 kA
20 kA
48
550
599
300
5
2
L70S025
25
700
650
200 kA
20 kA
62
810
900
340
7
4
L70S030
30
700
650
200 kA
20 kA
77
1,13 0
1, 2 2 0
417
10
5
L70S035
35
700
650
200 kA
20 kA
110
1, 470
1,500
500
12
6
L70S040
40
700
650
200 kA
20 kA
150
1,8 3 0
2,000
660
13
7
L70S050
50
700
650
200 kA
20 kA
250
2,670
3,200
1,0 70
16
9
L70S060
60
700
650
200 kA
20 kA
380
3,646
4,674
1,5 72
18
9
L70S070
70
700
650
200 kA
20 kA
545
4,800
6,000
1,9 70
16
9
L70S080
80
700
650
200 kA
20 kA
745
6,18 0
7, 5 5 0
2,380
21
11
L70S090
90
700
650
200 kA
20 kA
990
7, 6 5 0
9,250
2,830
25
13
L70S100
100
700
650
200 kA
20 kA
1, 2 6 6
9,407
11,117
3,266
29
14
L70S125
125
700
650
200 kA
20 kA
2,15 0
14,700
17, 5 5 0
4,900
33
17
L70S150
150
700
650
200 kA
20 kA
3,280
21, 25 0
25,700
6,800
51
24
L70S175
175
700
650
200 kA
20 kA
4,700
28,750
34,800
9,000
63
28
L70S200
200
700
650
200 kA
20 kA
6, 411
3 7, 3 0 0
45,583
11, 4 47
75
33
L70S225
225
700
650
200 kA
20 kA
8,000
46,500
57,000
16,000
43
24
L70S250
250
700
650
200 kA
20 kA
9,900
58,000
69,500
22,000
49
27
L70S300
300
700
650
200 kA
20 kA
14,000
83,000
9 7, 7 0 0
37,500
60
33
L70S350
350
700
650
200 kA
20 kA
19,000
113,000
131,000
59,000
71
36
L70S400
400
700
650
200 kA
20 kA
24,373
14 7, 2 9 0
169,000
87,875
107
49
L70S450
450
700
650
200 kA
20 kA
33,000
191,000
219,000
119,000
85
47
L70S500
500
700
650
200 kA
20 kA
44,200
240,000
275,000
155,000
92
49
L70S600
600
700
650
200 kA
20 kA
72,000
370,250
405,000
24 6,18 2
106
56
L70S700
700
700
650
200 kA
20 kA
110,000
526,000
573,000
255,000
128
67
L70S800
800
700
650
200 kA
20 kA
15 7, 0 8 2
735,330
762,333
262,949
156
78
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
41 of 68
L70S SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L70S
© 2019 Littelfuse, Inc.
Rev: 073119
3 of 6
POWR-GARD
®
Fuse
L70S SERIES HIGH-SPEED ROUND BODY
SERIES
AMPERAGE
RATING
AMP
CODE
CATALOG
NUMBER
ORDERING
NUMBER
PACK
QUANTITY
UPC
L70S
10
010
L70S010
L70S010.T
10 Pcs/ Box
07945810161
L70S
15
015
L70S015
L70S015.T
10 Pcs/ Box
07945810163
L70S
20
020
L70S020
L70S020.T
10 Pcs/ Box
07945810164
L70S
25
025
L70S025
L70S025.T
10 Pcs/ Box
07945810165
L70S
30
030
L70S030
L70S030.T
10 Pcs/ Box
07945810166
L70S
35
035
L70S035
L70S035.T
10 Pcs/ Box
07945810152
L70S
40
040
L70S040
L70S040.T
10 Pcs/ Box
07945810167
L70S
50
050
L70S050
L70S050.T
10 Pcs/ Box
07945810168
L70S
60
060
L70S060
L70S060.T
10 Pcs/ Box
07945810169
L70S
70
070
L70S070
L70S070.V
5 Pcs/ Box
07945810170
L70S
80
080
L70S080
L70S080.V
5 Pcs/ Box
07945810171
L70S
90
090
L70S090
L70S090.V
5 Pcs/ Box
07945810172
L70S
100
100
L70S100
L70S100.V
5 Pcs/ Box
07945810173
L70S
125
125
L70S125
L70S125.V
5 Pcs/ Box
07945810174
L70S
150
150
L70S150
L70S150.V
5 Pcs/ Box
07945810175
L70S
175
175
L70S175
L70S175.V
5 Pcs/ Box
07945810176
L70S
200
200
L70S200
L70S200.V
5 Pcs/ Box
07945810177
L70S
225
225
L70S225
L70S225.V
5 Pcs/ Box
07945810188
L70S
250
250
L70S250
L70S250.V
5 Pcs/ Box
07945810178
L70S
300
300
L70S300
L70S300.V
5 Pcs/ Box
07945810179
L70S
350
350
L70S350
L70S350.V
5 Pcs/ Box
07945810180
L70S
400
400
L70S400
L70S400.V
5 Pcs/ Box
07945810181
L70S
450
450
L70S450
L70S450.X
1 Pc/ Box
07945810182
L70S
500
500
L70S500
L70S500.X
1 Pc/ Box
07945810183
L70S
600
600
L70S600
L70S600.X
1 Pc/ Box
07945810184
L70S
700
700
L70S700
L70S700.X
1 Pc/ Box
07945810185
L70S
800
800
L70S800
L70S800.X
1 Pc/ Box
07945810186
Ordering Information
Dimensions
AMPERE
R ATING
FIGURE
NO.
DIMENSIONS INCHES (
mm
)
A
B
C
D
E
F
G
H
J
10 – 30
1
2 (50.8)
—
1
⁄
2
(12.7)
9
⁄
16
(14.3)
—
—
—
—
—
31 – 60
2
2
7
⁄
8
(73.0)
3
7
⁄
16
( 8 7. 3 )
3
3
⁄
4
(95.2)
4
3
⁄
8
(111.1)
1 (25.4)
43
⁄
64
(17.1)
11
⁄
32
(8.7)
1
⁄
8
(3.2)
—
61 – 100
2
2
7
⁄
8
(73.0)
3
9
⁄
16
(90.5)
3
11
⁄
16
(93.7)
4
3
⁄
8
(111.1)
1
7
⁄
32
(31.0)
29
⁄
32
(22.9)
5
⁄
16
( 7. 9 )
3
⁄
16
(4.8)
—
101 – 200
2
2
27
⁄
32
(72.2)
3
17
⁄
32
(89.7)
4
5
⁄
32
(105.6)
5
3
⁄
32
(129.4)
1
1
⁄
2
(3 8 .1)
1 (25.4)
13
⁄
32
(10.3)
1
⁄
4
(6.4)
—
201 – 400
2
2
27
⁄
32
(72.2)
3
17
⁄
32
(89.7)
4
5
⁄
32
(105.6)
5
3
⁄
32
(129.4)
2 (50.8)
1
1
⁄
2
(3 8 .1)
13
⁄
32
(10.3)
1
⁄
4
(6.4)
—
401 – 600
2
2
27
⁄
32
(72.2)
4
29
⁄
32
(124.6)
5
1
⁄
4
(133.4)
7
3
⁄
32
(180.2)
2
1
⁄
2
(63.5)
2 (50.8)
17
⁄
32
(13.5)
3
⁄
8
(9.5)
—
601 – 800
3
3
5
⁄
16
(8 4 .1)
5
5
⁄
16
(134.9)
6
13
⁄
16
(173.0)
—
2
7
⁄
8
(73.0)
2 (50.8)
5
⁄
8
(15.9)
3
⁄
8
(9.5)
5
⁄
16
( 7. 9 )
F
G
A
B
C
E
J
H
Fig. 4
A
B
C
D
F
G
E
H
Fig. 3
A
C
D
Fig. 1
Figure 1
Figure 2
Figure 3
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
42 of 68
L70S SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L50S
© 2019 Littelfuse, Inc.
Rev: 073119
1 of 6
POWR-GARD
®
Fuse
L50S SERIES HIGH-SPEED ROUND BODY
Specifi cations
Voltage Rating
500 V ac
450 V dc
Amperage Rating
10, 12, 15, 20, 25, 30, 35, 40, 50, 60, 70, 80,
90, 100, 125, 150, 175, 200, 225, 250, 275,
300, 350, 400, 450, 500, 550, 600, 700, 800
Interrupting Rating
Ac: 200 kAIC
Dc: 20 kAIC
Material
Body: melamine
Terminals: copper (silver plated)
Mounting Type
Cylindrical (10–30 A)
Bolted tags (35–800 A)
Operating Temperature
-55
°C to +125 °C
Storage Temperature
Up to 35 °C with relative humidity less
than 65 %
Approvals
UL Recognized (File: E71611)
CSA Recognized (File: LR29862)
Environmental
RoHS Compliant
Country of Origin
Mexico
Description
Littelfuse L50S series high-speed fuses are designed
to protect today’s equipment and systems, and are
manufactured with Littelfuse-developed technology that
sets tomorrow’s standards for accuracy, consistent quality,
reliability, and predictable performance.
Littelfuse engineers have redefined high-speed fuse
technology by using advanced metallurgical, polymer,
and materials research, mathematical modeling, and
computerized statistical analysis.
Features/Benefi ts
Extremely current limiting
Low watt losses
Controlled transient over-voltages
UL Recognized
Applications
Ac and dc drives
Dc common bus protection
Power converters
UPS
Soft-starters
Recommended Fuse Holder
LSCR001 (35–200 A)
LSCR002 (225–800 A)
Web Resources
Download technical documents:
Littelfuse.com/L50S
Note: high-speed fuses are designed for fi xed installations. They are not
intended for use in moving vehicle applications.
500 V ac • 450 V dc • Very Fast Acting • 10–800 A
SERIES
AMP
CATALOG NUMBER
ORDERING NUMBER
L50S
10
L50S010
L50S010.T
L50S
500
L50S500
L50S500.X
Part Numbering System
L50S xxx .T
Package Quantity
Series
Ampere Code
(3 digit minimum
amperage in decimal form)
Refer to Pack Qty.
Column in Ordering
Information Table
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
43 of 68
L50S SERIES HIGH-SPEED ROUND BODY
Littelfuse.com/L50S
© 2019 Littelfuse, Inc.
Rev: 073119
2 of 6
POWR-GARD
®
Fuse
L50S SERIES HIGH-SPEED ROUND BODY
Electrical Specifi cations
CATALOG
NUMBER
AMPERAGE
RATING
VOLTAGE
RATING
INTERRUPT
RATING
MELTING
(PRE-ARC)
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
TOTAL
CLEARING
I
2
T (A
2
s)
WATTS LOSS
AT 100 % RATED
CURRENT
WATTS LOSS
AT 80 % RATED
CURRENT
AC
DC
AC
DC
100
kA
@ 500 V AC
200
kA
@ 500 V AC
20
kA
@ 450 V DC
(W)
(W)
L50S010
10
500
450
200 kA
20 kA
21
112
128
85
2
1
L50S012
12
500
450
200 kA
20 kA
26
149
170
97
2
1
L50S015
15
500
450
200 kA
20 kA
34
222
250
116
2
2
L50S020
20
500
450
200 kA
20 kA
48
363
400
14 3
5
3
L50S025
25
500
450
200 kA
20 kA
62
528
600
170
7
4
L50S030
30
500
450
200 kA
20 kA
77
707
820
193
10
5
L50S035
35
500
450
200 kA
20 kA
130
1,12 0
1, 210
400
6
3
L50S040
40
500
450
200 kA
20 kA
161
1, 42 0
1,5 5 0
525
7
4
L50S050
50
500
450
200 kA
20 kA
222
2,15 0
2,360
867
11
6
L50S060
60
500
450
200 kA
20 kA
259
3,016
3,300
1, 2 8 7
13
7
L50S070
70
500
450
200 kA
20 kA
420
4,10 0
4,930
1,6 70
17
10
L50S080
80
500
450
200 kA
20 kA
554
5,300
6,950
2,240
19
10
L50S090
90
500
450
200 kA
20 kA
677
6,750
9,500
2,900
24
13
L50S100
100
500
450
200 kA
20 kA
807
8,273
12,600
3,626
30
16
L50S125
125
500
450
200 kA
20 kA
1, 2 9 0
13,10 0
19,000
5,15 0
22
12
L50S150
150
500
450
200 kA
20 kA
2,504
19,10 0
26,500
6,700
27
15
L50S175
175
500
450
200 kA
20 kA
3,224
26,300
35,000
8,700
33
17
L50S200
200
500
450
200 kA
20 kA
3,938
34,233
44,583
11,297
35
19
L50S225
225
500
450
200 kA
20 kA
6,034
43,500
56,000
14,750
31
17
L50S250
250
500
450
200 kA
20 kA
7, 510
54,000
69,000
19,600
36
19
L50S275
275
500
450
200 kA
20 kA
9,000
65,500
82,000
25,500
41
22
L50S300
300
500
450
200 kA
20 kA
10,808
78,500
97,500
32,200
42
23
L50S350
350
500
450
200 kA
20 kA
16,500
107,000
132,000
50,100
50
28
L50S400
400
500
450
200 kA
20 kA
22,941
142,333
169,667
72,270
58
30
L50S450
450
500
450
200 kA
20 kA
29,300
178,500
208,000
95,000
58
32
L50S500
500
500
450
200 kA
20 kA
37,000
220,000
250,000
118,000
64
35
L50S550
550
500
450
200 kA
20 kA
45,851
311, 6 6 7
347,333
176,766
75
41
L50S600
600
500
450
200 kA
20 kA
45,851
311, 6 6 7
347,333
176,766
98
50
L50S700
700
500
450
200 kA
20 kA
82,396
460,000
622,333
289,000
96
51
L50S800
800
500
450
200 kA
20 kA
115, 6 5 6
6 4 7, 6 6 7
687,500
465,590
118
60
POWR-
SPEE
D
®
Fuses
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
44 of 68
L50S SERIES HIGH-SPEED ROUND BODY

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