The Location where the Fuse is Connected to the Circuit and Connection Method of Patch Fuse in Circuit
1. The location where the patch fuse is connected to the circuit
When connecting patch fuses in a circuit, it is important to be careful not to connect the fuse to the neutral or ground wire. The correct connection is to connect it to the live wire so that when the circuit is overloaded, the fuse can be blown promptly to protect circuit safety. If only connected to the neutral line or ground wire, the fuse should blow promptly, but the voltage carried by the positive and negative poles through the live wire may also cause the circuit to burn out. Therefore, the priority order for fuses to be connected to the circuit is the live wire, neutral wire, and ground wire.
2. Connection method of patch fuse in the circuit
Usually, fuses are connected in series in a circuit. If the fuses are connected in parallel in the circuit, the current cannot be disconnected promptly in case of abnormal conditions in the circuit. If you want to use overload protection for multiple circuits, multiple fuses can be connected in series in that circuit.
Fig.1
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Littelfuse(力特)应用于乘用车的保险丝选型指南
目录- AUTOMOTIVE FUSES Product introduction BLADE FUSES CARTRIDGE FUSES HIGH CURRENT FUSES SMD FUSES CABLE/PAL FUSES HIGH VOLTAGE FUSES Shunts/Diodes/Resistors Fuse General knowledge
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【选型】Littelfuse(力特)保险丝座选型指南
目录- Fuse Characteristics, Terms and Consideration Factors Fuse Selection Checklist PTC Characteristics and Terms PTC Product Applications Typical PTC Circuit Protection Designs Fuse Standards Fuse and PTC Products Selection Guide Fuse Packaging and Part Numbering
型号- 1812L,471,230,472,473,232,233,234,235,477,874,875,876,239,877,2016L,461E,485,LORHO,400,157T,369,804,807,808,600R,437 SERIES,USBR,370,251,372,373,494,253,374,2205,SL,0603L,0805L,ST,382,262,383,263,385,265,266,267,268,269,303,429,1210L,LR,LT,391,1206L,392,272,273,274,395,154,275,396,397,398,157,278,399,219XA,279,312,950,313,30R,159,314,435,315,437,438,318,LORHO PTC,160,285,440,250S,441,250R,322,443,202,203,324,VL,325,446,326,447,448,449,208,209,VT,16R,451,452,332,453,154T,454,213,456,215,72R,216,458,60R,217,459,218,977,460,461,220,462,464,465,224,466,225,467,468,501,469,229,505,506,2920L,508
Calculation Method for Melt Current of Fuse Fuses
The current of a fuse includes two aspects, one is the rated current of the fuse tube, and the other is the rated current of the melt, which cannot be confused.
Eaton Bussmann(伊顿巴斯曼) 低压、分支电路额定熔断器(保险丝)选型指南
目录- Holders & Blocks Branch Circuit Rated Fuse Dimensions Fuses
型号- LPN-RK-225SP**,S-2-1⁄2,LPN-RK-500SP**,FQN-R-3,S-2-1⁄4,KTN-R-400,JKS-12,JKS-15,KRP-C-2001SP,LPS-RK-4-1/2SP,JKS-10,KLU-800,KTU-3001,KTU-3000,S-1-8⁄10,KWS-R,LPS-RK-1-8/10SP,FNQ-R-3-1/2,FRS-R-400,JKS-25,FRS-R-40*,JKS-20,PVS-R-225,TCF40RN,BC,FRS-R-6/10,LPN-RK-6-1/4SP,DLS-R-3-1/2,JJN-600,BG,BH,G,T-3⁄10,LPJ-45SP**,KRP-C-750SP,KRP-CL,T-5-6⁄10,KRP-CL-300,213-R,P,JKS-35,S,T,LPN-RK-1-8/10SP,JKS-30,KRP-C-1900SP,W,LPS-RK-8/10SP,SA-30**,KTK-R-1/10,LPJ-1-6/10SP,CH,OPM-NG-SC3,LPJ-2-1/4SP,FRN-R-600,JKS-45,FRN-R-60*,DLS-R-500,FNQ-R-1-3/10,LPJ-70SP**,LPN-RK-3/10SP,JKS-40,LPJ-SP,T-3-2⁄10,FRN-R-8/10,KWS-R-225,FNQ-R-17-1/2,KTN-R-200,FNQ-R-4-1/2,R250,PVS-R-250,LPS-RK-3-2/10SP,FRS-R-600,NOS-175,FRS-R-60*,LPS-RK-70SP**,JJN-400,KTN-R,LPN-RK-9SP,DLN-R-2,DLN-R-3,KRP-CL-500,DLN-R-4,DLN-R-5,DLN-R-6,LPN-RK-4/10SP,DLN-R-8,LP-CC-6-1/4,KLU-1500,DLN-R-1,KTU-5000,LPS-RK_SP,226-R,TCF20RN,DLS-R-1-6/10,KRP-C-6000SP,FNQ-R-5-6/10,616-R,S-1-1⁄4,FRN-R-400,S-1-1⁄8,LPJ-600SP**,JKS-500,FRS-R-4-1/2,KWS-R-250,FRN-R-40*,T-2,DLS-R-300,T-1,T-4,DLN-R-90,T-3,KTU-601,T-6,T-5,T-8,T-7,T-9,NOS-125,JJS-45,HP,LP-CC-3-1/2,JJS-40,DLS-R-25,DLS-R-30,DLS-R-35,FRN-R-70,KTS_R,FRN-R-450,KTK-R-3/4,NON-1-6/10,DLN-R-80,LPS-RKSP,KRP-C-5000SP,FRN-R-45*,PVS-R,JKS-90,JJS-35,OPM-1038RSW,KRP-C-1800SP,S-3⁄10,JJS-30,LPN-RK-90SP**,LPN-RK-150SP**,DLS-R-15,T-1-1⁄4,242-R,LPS-RK-10SP**,FRN-R-75,DLS-R-20,FRN-R-225,T-1-1⁄8,FRN-R-8*,FRN-R-80,KLU-2000,DLN-R-70,DLN-R-300,JJS-225,JJS-25,LPS-RK-80SP**,JP,JJS-20,FRN-R-85,LPJ-110SP**,KWS-R-200,FRS-R-450,LPN-RK-17-1/2SP,DLS-R-12,FRN-R-90,FRS-R-45*,DLS-R-10,TCFH30N,FRN-R-9*,LPN-RK-12SP,DLN-R-60,S-1-6⁄10,DLN-R-45,NON-1,JJS-15,NON-2,NON-3,NON-4,JJS-10,FRN-R-1,NOS-150,LPN-RK-2-1/2SP,FRS-R-225,KRP-C-2500SP,FRN-R-4,FRN-R-5,FRN-R-2,FRN-R-3,JJS-450,KRP-C-3800SP,FRN-R-6,KRP-CL-150,FRN-R-7,FRN-R-200,KTK-R-15,KTU-801,FRN-R-20*,FRS-R-3-1/2,KTK-R-10,KTU-800,KTK-R-1/,DLN-R-50,LPN-RK-250SP**,TCF35RN,DLN-R-35,FRS-R-2-1/4,KTN-R-600,FRS-R-8/10,JJS-80,KTK-R-25,LPN-RK-2/10SP,FRN-R-250,KTK-R-20,JKS-50,KRP-C-1350SP,DLN-R-40,DLS-R-70,FRN-R-25*,2662-R,DLN-R-20,DLN-R-25,JJS-70,SC-1-1/2,FRS-R-200,LPS-RK-1-/2SP,EDA***,FRS-R-20*,FNQ-R-2-1/4,JKS-60,KTK-R-30,DLN-R-30,DLS-R-60,FNQ-R-2-1/2,KRP-C-4500SP,DLN-R-12,DLN-R-10,DLN-R-15,LPN-RK-5SP,FNQ-R-1-1/8,KWS-R-400,FRN-R-6/10,JJS-60,DLS-R-2-1/2,NOS-100,JJN-800,LPN-RK-40SP**,FNQ-R-1-1/2,DLS-R-50,LPS-RK-45SP**,JKS-70,S-25,TCF17-12RN,S-20,LPN-RK-25SP,NOS-350,LPN-RK-2-1/4SP,LP-CC-1-8/10,JJS-250,JJS-50,LPS-RK-175SP**,NOS-110,LPS-RK-1/10SP,KRP-CL-350,DLS-R-40,DLS-R-45,LPS-RK-4SP,PVS-R-200,S-15,LP-CC-4-1/2,KRP-C-650SP,S-14,TCF100,S-12,JKS-80,S-10,DLS-R-150,NOS-400,KRP-C-4000SP,LPN-RK-1/2SP,DLS-R-9,LP-CC-30,DLS-R-8,KWS-R-40,DLS-R-7,DLS-R-6,DLS-R-5,DLS-R-4,DLS-R-3,DLS-R-2,KRP-C-1600SP,DLS-R-1,LPJ-8SP**,LPS-RK-400SP**,NOS-50,JJN-1200,LP-CC-1/2,LPN-RK-80SP**,FRS-R-1-1/2,LPJ-175SP**,LP-CC-7 1/2,KRP-C-2400SP,KWS-R-35,JKS-250,FRS-R-1-1/4,TCFH60N,LP-CC-25,TCF25RN,KTU-1600,KWS-R-30,LP-CC-20,KTK-R-1,KTK-R-3,NOS-60,KTK-R-2,KTK-R-5,KTK-R-4,T-3-1⁄2,KTK-R-6,LPJ-3-2/10SP,LPS-RK-5SP,S-30,KTK-R-9,FRN-R-4/10,LPS-RK-35SP**,LPN-RK-2SP,JJN-250,KWS-R-25,LPN-RK-20SP,LP-CC-12,NOS-75,LP-CC-2-8/10,JJS-500,LPJ-1SP,LPS-RK-20SP**,DLN-R-150,LP-CC-5-6/10,LP-CC-10,FRN-R,KWS-R-20,LPJ-1-1/4SP,LP-CC-15,NOS-70,SC,KWS-R-10,SL,KWS-R-12,DLS-R-175,KWS-R-15,DLS-R-90,T-8⁄10,NOS-80,LPN-RK-600SP**,TC,LP-CC-6/10,DLS-R-17-1/2,FNQ-R-7-1/2,LP-CC-1-W,TL,FRS-R-1 8/10,LPS-RK-17-1/2SP**,DLS-R-80,NOS-600,LPN-RK-1/4SP,KWS-R-80,KRP-C-1500SP,NOS-10,LPN-RK-110SP**,NOS-12,KTU-2500,NOS-15,FRS-R-6*,LPJ-90SP**,LPN-RK-100SP**,DLN-R-3-210,LPS-RK-50SP**,FNQ-R-8,NOS-20,DLN-R-100,FNQ-R-7,T-2-1⁄4,SA-15**,KWS-R-70,FNQ-R-9,T-2-1⁄2,KTU-1400,NOS-25,FRS-R-7*,FRS-R-70,FNQ-R-2,FNQ-R-1,FNQ-R-4,FRS-R-75,263-R,FNQ-R-6,FNQ-R-5,FRN-R-5-6/10,FRS-R-65,TCF80RN,LPS-RK-600SP**,FRN-R-1-8/10,FRS-R-8*,NOS-30,KWS-R-60,JJS-300,NOS-35,FRS-R-80,PVS-R-90,TCFH100N,S-6-1⁄4,FRS-R-250,LPJ-500SP**,FRS-R-25*,KLU-3000,LPN-RK-125SP**,LPN-RK-400SP**,LPJ-20SP**,FRS-R-9*,EDN**,KWS-R-50,NOS-45,642-R,LPS-RK-60SP**,FRS-R-90,PVS-R-80,NOS-40,JJN-1000,LPJ-7SP**,KWS-R-45,TCF6RN,KRP-C-801SP,DLN-R-125,LPJ-35SP**,KLU-650,LPS-RK-1-6/10SP,FRS-R-4/10,KRP-CL-600,PVS-R-70,LPJ-300SP**,KLU,PVS-R-175,LPN-RK-8/10SP,NON-8/10,KTU-1200,S-4-1⁄2,PVS-R-60,626-R,LPJ-3-1/2SP,JKS-400,FRN-R-1-4/10,KTU-4500,LPS-RK-2-1/4SP,JJN-200,KTN-R-225,LPJ-5SP,PVS-R-50,LPN-RK-50SP**,TCFH,LPS-RK-2/10SP,LPJ-4-1/2SP,W-1 8/10,LPJ-200SP**,NON-3/4,PVS-R-40,KRP-C-1400SP,FRN-R-2/10,TCF*,KTN-R-450,TCF6,S-2-8⁄10,DLS-R-100,TCF60RN,LPJ-SPI,PVS-R-30,W-1/2,DLN-R-175,JJN-225,FRS-R-15/100,PVS-R-35,LPN-RK-1/10SP,CFD30J3,KLU-601,JKS-450,S-3-1⁄2,DLS-R-110,LPJ-9SP**,DLS-R-350,KTU-1000,PVS-R-20,JJN-450,LPN-RK_SP,NOS-1,PVS-R-25,NOS-2,NOS-3,KTK-R-3/10,NOS-4,NOS-5,NOS-6,NOS-7,NOS-8,NOS-9,LP-CC-8/10,LPS-RK-300SP**,JKS-200,DLS-R-125,LPJ-100SP**,FRS-R-2-I/2,FRS-R-2/10,T-4-1⁄2,LPS-RK-2-1/2SP,LPJ-3SP,LPJ-60SP**,LPS-RK-200SP**,SC-1,SC-2,KRP-C-601SP,NON-1/2,2664-R*,LPS-RK-90SP**,NON-1/8,LPS-RK-3-1/2SP,LPJ-2-1/2SP,FNQ-R,KTN-R-250,JKS-225,LPS-RK-100SP**,FNQ-R-6-1/4,FRN-R-1-6/10,KTK-R-2/10,JJN-700,KTU,KRP-CL-200,J600
Littelfuse EV1K Series Fuse First to Provide 1000Vdc Automotive Grade Protection for Next-Gen Passenger Cars and Commercial EVs
Littelfuse announced the new EV1K Series Fuses, the first Automotive Grade fuse with a rating of 1000 Vdc. They are designed and tested to meet the overcurrent circuit protection needs of the eMoblilty market.
Selection of Current Fuses in Automotive Circuits
In automotive circuits, the selection of current fuses is of great significance for ensuring the safe operation of the vehicle. There are several key factors to consider when choosing a current fuse for an automotive circuit.
The Installation Precautions for Current Fuses
The installation of current fuses is crucial for ensuring the safety and proper functioning of electrical circuits. Here are some important installation precautions to keep in mind.
Essential Knowledge for Selecting Automotive Fuses
When a certain overload current passes through, the heat generated is radiated to the surrounding environment through the melt and shell, and the heat dissipated through convection, conduction, and other means gradually reaches a balance with the heat generated. If the generated heat is greater than the dissipated heat, the melt temperature can increase; When the temperature reaches or exceeds the melting point of the melt, the melt melts, fuses, and cuts off the current, playing a role in safety protection of the circuit.
The Role of Current Fuses in Smart Meters
Current fuses play a vital role in smart meters. Firstly, they provide protection against overcurrent events. Smart meters are used to measure and manage electricity consumption accurately. However, electrical circuits can sometimes experience sudden surges in current due to various reasons such as power outages and subsequent restoration, short circuits in the electrical grid, or the malfunction of connected electrical appliances.
Self Recovery Performance and Working Process of Self Recovery Fuses
Traditional fuses are installed in circuits. When an overcurrent occurs due to a fault or abnormality in the circuit, the fuse itself melts to cut off the current and protect the circuit. However, due to the fact that traditional fuses can only protect once and need to be replaced if burned out, some products still cannot resume operation after troubleshooting or abnormal overcurrent disappears. As a new type of overcurrent protection device, the self-recovery fuse has the function of automatic recovery, which can meet the performance requirements of similar applications.
Precautions for Using Fuses
The fuse is connected in series with the circuit, installed vertically, and installed on each phase line; Fuses are not allowed to be installed on the neutral line of a two phase three wire or three-phase four wire circuit.The power input terminal of the spiral fuse should be connected to the center point of the base, and the output wire should be connected to the threaded shell; This insurance is used in places with vibrations.
Principle of Resettable Current Fuses
Resettable current fuses offer a unique solution for protecting electrical circuits while providing the convenience of being reusable. Here‘s how they work.
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