【技术大神】USB 防护电路设计及注意事项

2016-09-07 技术大神活动文章
保险丝,保护器件,二极管,1206L 保险丝,保护器件,二极管,1206L 保险丝,保护器件,二极管,1206L 保险丝,保护器件,二极管,1206L

在我们设计的一款工控机产品中,带有四个USB2.0接口,分别用于接鼠标、键盘以及其它的USB设备。我们发现在做EFT或者静电试验时,外接的键盘和鼠标会死掉。轻者试验结束后,鼠标键盘还能使用。重者试验结束后,鼠标和键盘需要重新插拔后才能使用,因此非常影响设备的使用。另外插入USB接口设备的电流过大的情况,可靠导致前期电源损坏等情况,这两个问题实际是USB设备存在比较大点问题。


面对此问题,我们对电路进行了改版。与世强的FAE沟通后,其根据我们的实际需求推荐了一些电路的防护器件。项目的USB2.0速率为480Mbps,对于此接口防护的TVS管结电容在5pF以内,世强FAE便推荐使用LITTELFUSE的TVS二极管SP3002。SP3002芯片的结电容仅仅0.85pF,对ESD接触12KV,空气15KV,EFT有效抵抗40A,5/50ns冲击,浪涌有效抵抗4.5A,8/20uS冲击。而且由于SP3002为SOT23-6封装,体积非常小,适合USB端口比较密集的场合,在两个USB端口采用一片SP3002芯片即可。如下图1为USB接口采用SP3002防护的电路图。


图1:USB接口采用SP3002防护的电路图


为了更有效的防止USB接口的过电流,在5V电源上串一根快恢复保险丝,这样过流可以更好的防护由于外部USB过电流对电源的影响。如果外接USB设备电流超过快恢复保险丝电流,快保险丝能够快速断开5V电源,过电流消失后,快恢复保险丝恢复,供电正常。此优化方案成本低,可靠性高,可重复使用。另外,一般USB2.0能够提供500mA的电流,故保险丝采用Ihold为0.5A的器件,型号为1206L050/15。USB电源保护电路如图2所示。
 

图2:USB电源保护电路


经过上述电路的改进,新设计的工控机板卡在进行电源EFT和静电测试时,接在此USB的键盘鼠标再无出现死机的情况。我们一并测试了USB设备外加0.6A的电流的电路情况,包括保险丝保护及5V电源端口,发现在电流去掉后USB接口又恢复正常。


在上述USB电路保护的时候,选取器件和布线需注意以下几点:
1)在选取TVS阵列时,USB2.0选取的结电容在5pF以下,USB3.0选取的结电容在1pF以下,如果不按此选取,会对差分信号质量有很大的影响。
2)USB电源部分除了串联快恢复保险丝,后端还可再添加PI型滤波电路,这样有效的减小EMI的干扰。
3)在选取快恢复保险丝时,根据需要选取小尺寸封装。另外,Ihold为USB能够通过的最大电流值,例如USB2.0为500mA,USB3.0为900mA,也需根据不同的需求选型。
4)在PCB板设计时,USB接口的差分线需要用地包裹。差分线下面需要有完整的参考平面,TVS保护器件需要可靠的接到大地平面,使干扰能够快速释放到大地上。
5)在USB端口比较密集的情况下,保护器件是必不可少,建议选用体积小且一个便可保护多路USB的TVS器件。


通过上述讲解,USB防护能够有效的避免,笔者认为很大一部分功劳可归根于Littelfuse的TVS防护器件。经使用后发现Littelfuse的产品是电路防护不错的选择!


作者:国电南网 吴工

授权代理商:世强先进(深圳)科技股份有限公司
技术资料,数据手册,3D模型库,原理图,PCB封装文件,选型指南来源平台:世强硬创平台www.sekorm.com
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  • 五五分成 Lv7 资深专家 2018-08-25
    接口防护电路的TVS管为什么都是正反两个方向,不能采用单向的防护管吗?
    • Honglei_世强回复: USB数据线上全部用的是双向TVS二极管保护,主要是考虑到瞬间电压有负的,最好采用双向的,才能抑制正负的电压。

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  • 五五分成 Lv7. 资深专家 2018-08-25
    好设计。
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型号- 45302.5,0977016.XEP,03540903ZXGY,0154.125,03540821ZXBL,0482 0007ZXB,03540911ZXGY,01550009ZXA,111 501,111 505,111 506,0454003.,0454001.,01550009ZXU,3453HS3-010,03540001ZXGY,800,801,03540806ZXGY,802,454007,803,804,454005,454004,0477016.XEP,454003,0454002.,807,808,0482 0019ZXB,015401.6,015401.5,0100 0054,208 000P,0977.800XEP,0216 000XP,154.315,820 20,0453.250,0215.125XEP,345 101,225 000P,810,811,640 0000 1603,813,814,815,816,0482 0007ZXP,559 0000 00 01,0154.375,0275025.,121004,282008,65800001XXX,121001,282007,820,121002,821,282002,0100 0058,823,824,282001,0100 0056,3453LF2-010,03540912ZXGY,154.375,0216.800XEP,03540807ZXGY,100 058,0453002.,0453.080,100 054,100 056,01550114ZXA,830,03540902ZXGY,831,0281 0008H,0107 0002,853 0000 1009,834,0454007.,835,837,0477.800XEP,279 000,154.125,0106 0001,216SP,800 01,0154.315,101001,0482 0001ZXPF,0215001.XEP,0453003.,0482 0019ZXP,562 0000 1009,3453HS4-010,01550114ZXU,454002,454001,015403.5,453.062,02450002X,3453LF1-010,65800003XXX,0154.100,850,0482 0009ZXB,851,852,853,855,856,0454005.,02450002H,129 002,0213 000P,129 001,01550020ZXA,0100 0020,0482 0020ZXB,314 000P,866 0000 1009,02450001X,0453001.,15403.5,3453LF1-020,0281 0007H,0482 0020ZXP,0453.062,154.750 T,860,862,865,03540010ZXGY,866,837 0000 0005,02450001H,01550020ZXU,0454004.,0520 0005 ZXGY,313 000P,824 0000 0005,125002,125001,0213 000 XEP,870,03540808ZXGY,874,875,876,877,PICO 259,0217.315 XEP,3453LF4-010,0154.750,0453007.,649 0000 3039,0285.125 XRP,127 002,0281 0005H,640,816 0000 0005,655 0000 0405,400,646,648,649,0482 0015ZXP,127 001,0482 0009ZXBF,0217.400 XEP,815 0000 0005,342 058,52100001009,830 0000 0005,0453004.,01550104ZXU,0482 0002ZXPF,652,653,0482 0005ZXB,655,0482 0010ZXPF,656,101002,658,101003,646 1200 7113,659,01550104ZXA,03540011ZXGY,451.1,03540901ZXGY,0453005.,342 048,660,824 0000 0205,429,0215020P,0482 0017ZXB,649 0000 1039,435,437,438,659 0000 0009,0482 0005ZXP,0451.062,440,441,443,202,203,445,254 121,446,688,447,448,449,208,209,646 1200 7123,154001. T,0482 0003ZXPF,0154.500,0453008.,824 20,451,452,453,0520 0001,354 101-GY,454,213,456,215,03540012ZXGY,458,216,459,217,218,453.1,453.2,03540809ZXGY,453.8,453.5,0520 0004 Z,453.4,460,3453LF3-010,461,0451.080,312 000,462,220,464,465,0482 0008ZXBF,466,224,467,225,468,469,254 101,229,800 0000 0105,0482 0017ZXP,560 0000 13 19,01000020Z,471,230,472,0101 0001,473,232,233,0356 0011Z,234,477,235,239,125 001,125 003,570 0000 0001,125 002,0445 0001,03540601ZXGY,154002. T,109 002,345_ISF,02200029MXP,0281 0001,109 001,481,482,0101 0002,242,485,0101 0003,0482 0016ZXBF,04533.15,245,0356 0010Z,0215020.XEP,01550004ZXA,102064,345 101-010,0482 0002ZXB,0482 0002ZXP,03540005ZXGY,803 01,251,494,253,254,0122 055Z-1,348 677,354 700,01550004ZXU,348 671,03540101ZXGY,0482 0019ZXPF,15401.5 T,03540906ZXGY,3453QS2-010,0216.050XEP,345 101-020,03540803ZXGY,262,102071,263,265,266,267,268,520 001,269,520 003,520 004,PICO 259-UL913,0482 0007ZXBF,0235006.XEP,0482 0004ZXPF,0218 000P,272,030,273,274,03540602ZXGY,275,154.8,262 000,278,0239 000P,279,505 000P,0453.630,154.1,0154007.,0482 0014ZXP,154.5,154.4,154004. T,155 100,154.2,3453QS8-010,01550014ZXA,340 313,0482 0014ZXB,281,282,01550120ZXU,340 312,285,286,155 004A,348 600,04611.25,0453.400,852 0000 1009,01550120ZXA,045306.3,0281 0008 H,1541.25,268 000,811 0000 0005,01500145HXB,01550014ZXU,0482 0017ZXBF,348 877,155 114A,0218.032 XEP,3453QS3-010,278 000,348 871,640 0000 1003,658 0000 1109,0482 0001ZXBF,03540004ZXGY,155 004U,220 000P,58300000005,831 0000 0005,0482 0006ZXBF,451.125,03540907ZXGY,0482 0005ZXPF,155 006A,0154008.,03540802ZXGY,155 114U,00300210M,155 006U,850 0000 1009,0254 0002Z,344 125,658 0000 4009,0482 0010ZXP,045402.5,01550109ZXU,03540905ZXGY,0154003.,0482 0010ZXB,3453LF8-010,01550006ZXU,00300210N,3453QS7-010,0254 0003Z,0232 000P,03540003ZXGY,0482 0002ZXBF,0482 0009ZXP,0154002.,348 800,0482 0009ZXPF,0154.080,0453.200,3453RF8-010,01550100Z,0359 0010Z,315 000P,03540603ZXGY,3453HS1-010,02810001H,520_W,332 000P,224 000P,66000001009,508 000P,0154005.,0477.500XEP,325 000P,155 009A,3453QS4-010,0359 0011Z,0482 0018ZXBF,0254 0001Z,453.315,851 0000 1009,155 009U,15401.6,286 377,15401.5,0482 0021ZXPF,45403.5,0154004.,01550109ZXA,0359 0012Z,653 0000 0405,0482 0008ZXPF,154.375 T,3453LF7-010,454.375,0216001.XEP,835 0000 0005,322 000P,03540805ZXGY,345 121,658 0000 3109,652 0000 0405,03540002ZXGY,266 000,0275030.,154L,02200019MXP,03540604ZXGY,045302.5,281010,03540904ZXGY,208 000EP,0482 0003ZXBF,453.75,45303.5,0216016.XEP,0482 0020ZXPF,0154001.,3453HS2-010,354 900,281007,154T,281008,281005,0482 0012ZXB,0482 0012ZXP,640 0000 1403,03540804ZXGY,51800001009,453.63,0482 0019ZXBF,0356 0012Z,45401.5,0154.062,834 0000 0005,01550006ZXA,0217015 XEP,453.125,344 400,015402.5,0218.125 XEP,0254 0204Z,344 405,230 000P,344 402,0482 0007ZXPF,344 401,0453.160,344 404,344 403,0482 0004ZXBF,0233 000P,0482 0018ZXP,0154.250,0482 0015ZXPF,265 000,354 000,209 000EP,801 0000 0005,453.08,640 0000 1503,0520 0101 Z,03540008ZXGY,0482 0018ZXB,0254 0205Z,810 0000 0005,571 0000 0001,

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目录- Company profile    Circuit Protection Technologies    Overcurrent/Overvoltage Protection device    ESD Suppression Solutions    Overcurrent Protection/Overvoltage Protection Applications    Common Circuit Threatsand Protection Solutions    Fuses    Fuse Holders    PPTC Devices    Varistors    Gas Discharge Tubes    ESD Suppressors    TVS Diode Arrays    Protection Ics    TVS Diodes    PLED Bypass Protectors    SIDACtor® Protection Thyristors    Circuit Breakers   

型号- PXXX0SAMC,LS2406ERQ23,1812L,LVR,SPHV,30KPA-HR,456SE,456SD,15KPA,345 SERIES,ITV9550 30A,AQ24CANFD,SDP,AC,RUEF110S,LS2406ERQ33,PXXX2AC,MICROSMDCH,562 SERIES,AQ1003-01ETG,SDPXXX0T023G5,150603,800,801,802,804,806,807,BA,808,BB,PGB2,PGB1,P4SMA,TSM600,PTF070,MICROASMD,SC1103C-01UTG,PTF078,PTF077,LS0504EVT233,PTF075,AQXXC-01LTG,810,811,356 SERIES,5KP,813,FB65,814,FB66,CA,CG,CH,PTF080,286677,PICOASMDCH,PXXX2AX,MINIASMDC,SMF4L,121004,B61089BDR,282008,121001,282007,820,121003,AK10-Y,821,121002,282002,823,824,282001,FB55,DA,828,DB,FB58,NANOASMDCH,820-20,830,831,834,835,TP5KP,101001,3453,3452,605,606,RKEF,607,PXXX2ACMC,LS12052BD33,AGRF,PTF0080M,B61089QDR,RUEF135V,850,851,852,3455,853,AHEF100,60R,617,618,GTCX36-XXXM-R05,PXXX0Q12X,860,862,HA,HB34,GTCX36-XXXM-R10,2920L,SP8008,AQ4337-01ETG,155 SERIES,P6SMB,803-01 SERIES,SLD,810 SERIES,870,PTF015,874,875,876,342 SERIES,877,5.0SMDJXXS-HRA,348 SERIES,30KPA,SM7,SM24CANB,SMCG-HR,TSV250,FC09B1606NL-0,SMD,SMF,TPSMB-VR,881,35408 SERIES,OMN002,400,OMN004,885,35406 SERIES,881 SERIES,OMN006,646,405,647,V20H275AUTO,407,649,RXEF,101010,52100001009,AQ24CANA,AQHVXX-01LTG,656,101002,PXXXXDF,658,101003,5KPA-HR,824-20 SERIES,5.0SMDJ,570 SERIES,AQ3530-01FTG,B-SERIES,662,663,422,664,665,LA,SMBLCE-HR,L-SERIES,AQHVXX-01LTG-C,PTF050,SC1105-01UTG,PTF055,G-SERIES,435,437,438,A-SERIES,870 SERIES,PTF065,440,RGEF,437A,441,SP1103C,443,202,203,254 121,445,446,688,447,3453 SERIES,448,449,208,209,TR600,04450001,PTF030,438A,451,SRP,452,453,454,TSM250,PTF035,213,456,215,821 SERIES,458,216,LV ULTRAMOV,459,217,218,SP3401,SP3400,AQ3522-01FTG,TPSMC,FHN26G2,TPSMB,PTF040,TPSMD,LS2405IDD23,PTF045,460,461,5KPA-HRA,462,220,464,465,466,224,467,225,576 SERIES,468,254 101,229,BXXX0CX,SL0902A,102080,470,BXXX1UX,471,472,230,473,232,233,501A,476,234,235,477,MIDSMD,PXXX4UCMC,239,MHS,850 SERIES,813 SERIES,AQ1205-01ETG,483,RA,485,487,802 SERIES,259UL913,ITV4030 22A,SM20,345121,102064,254 201 - 208,251,494,PLEDXUX,253,SD,SE,SG,SH,259,4.0SMDJ,SL1002A,SM,15KPA-HRA,15KPA-HR,GTCX37-XXXM-R10,102074,102076,102079,102078,NANOSMDCH,GTCA28-XXXM-R03,NY61AP,262,102071,263,265,266,3.0SMC,267,DSLP,268,269,LOW RHOPTC,520 002,520 003,520 004,SL1003A,520 005,1KSMB,345101,MLA,LS24062RQ23,1210L,AQ36CANA-02HTG,445073,MLE,MHP-TAM15,272,273,MLN,M-SERIES,274,E-SERIES,275,278,279,AQ3102-02HTG,MHP-TAC6,803-01,MHP-TA,285,AQ3041,SMBLCE-HRA,PLEDXUSXA,SP4322-01ETG,AQ3045,TP1.5KE,SP4208,SC1205-01ETG,820-20 SERIES,354 SERIES,CG33.0L,SP11XX,359 SERIES,MS-SERIES,111 SERIES,100 SERIES,NANOSMDC,346877,PICOASMDCH010F-2,340 SERIES,AHRF300,AHEF,342025,342024,342021,ZA,AQ3400,XGD,FH604,AQ1250-01ETG,PXXX3ACMC,FH602,PXXX6U,SP4010,342006,PLEDXN,SZD200,HG34,PLEDXS-A,J-SERIES,824 SERIES,FEMTOASMDC,ITV5432 30A,AK6-Y,557 SERIES,SL1021A,SL1021B,SP4020,SP4022,SP4021,SMDCH,SP4024,281010,SP4023,PLED,MINISMDC,AXXXXUX6,254 011 - 008,SMTAK3,PXXX0Q22XLH,MHP-TAM6,AK15,445005,281007,154T,281008,281005,AK10,AQ1005,51800001009,PXXXXS4X,ITMOV,354701 SERIES,483A,445004,LS05006VPQ33,SP4044,BXXX1UC4,SP4045,5200001,SMBJ,AQXX-01LTG,AQ7538-08UTG,SP1064E-04UTG,TCF250,SMTOAK2,SMAJ,AQ7520-08UTG,PXXX3AX,NANOASMDC,461E,811 SERIES,800 SERIES,157T,FC51,PXXX1U,PXXX1S,TRF250,SMBJ-HRA,SMDJ,CG3,SP3384NUTG,CG2,CG5,CG4,2205,CG7,B3XX4UX,CG6,VLP,VLR,0603L,PLEDXUX-A,SMCJ,PICOASMDC,LS0504EDD12,SMD2,PXXX0Q22C,GTCX35-XXXM-R05,SMDJ-HR,SMDC,TMOV34S,AHRF,440A,AXGD10603NR,K-SERIES,TPSMC-VR,H-SERIES,SZ1SMB,SZ1SMC,SZ1SMA,219XA,AK20-Y,ITV9550L2030MR,441A,SZ1.5SMC,SP1250-01ETG,C-SERIES,SC1210-01ETG,TB-SERIES,0402L,ITV9550 45A,AHRL,DHB34,FHN26W,AUML,TP6KE,LTKAK3,AQRV05-4HTG,LTKAK2,72R,977,TLP,LTKAK6,AQ15CANA-02HTG,PXXX3AC,SP3205-01ETG,501,3452 SERIES,504,505,506,507,GTCX23-XXXM-R01,508,8.0SMDJ,PXXX3U,100060,100061,100062,122090,100063,100064,100065,PXXX0SX,100066,SC1533-01LTG,SPHV-C,AHS,122093,150318,TS600,150319,150316,150317,150315,AQ3102-02JTG,150312,513,514,100058,100059,2016L,286377,122088,122087,559 SERIES,122083,GTCX26-XXXM-R05,521,523,AK15-Y,100067,526,150322,527,PXXX2SXLH,SL1411A,AK1,AK3,AK6,VTP,422A,SMCJ-HRA,ASMD,C-III,SR70,0805L,860 SERIES,RHEF,SMF3.3,303,304,305,308,35409,35408,35407,35406,TPSMA6L,PXXX2SX,SP724,SP725,SC1115-01UTG,TSL250,LOW RHO,HMOV,SP723,SP720,SP721,312,313,30R,314,556,315,557,559,318,SLD6S,SP1305,SP712,560,562,322,564,324,325,326,328,SLD5S,CX-SERIES,570,571,332,SLD8S,PXXX0SD,576,TRF600,PICOSMDC,3.0SMCJ,SZSMF,LS1205EVD33,SP1326,AQ12CANA-02HTG,340,150307,100,342,FHN20G,344,345,35407 SERIES,348,SMAJ-HRA,150300,AUMOV,LTKAK10,445 SERIES,SC1333-01ETG,RUEF,GTCX25-XXXM-R02,GTCX25-XXXM-R05,LS0502SCD33,111,354,356,52000001009,359,824-20,SP3420,150274,RUSBF,SP1003,SP3422,PXXX0ME,564 SERIES,SP2555NUTG,51900001009,10207101009,520 101,369,SL1122A,571 SERIES,SP1233,AQ2555NUTG,SP1255P,600R,PXXX4UX,WB07B0606LG,370,372,1.5SMC,TLPA,373,1.5SMB,374,SZSMF4L,377,820 SERIES,254 131,PXXX1CX2,SEPXXXXQ38,00300210,SZW200,TP5.0SMDJ,523 SERIES,SP1005,SP1006,CG32.0L,382,AQ1205-01FTG,383,385,35409 SERIES,407A,V14H460AUTO,SMA6L,391,392,CG32.5L,N-SERIES,SMA6J,395,3425L,F-SERIES,154,396,397,398,157,399,159,SC1122-01UT

选型指南  -  LITTELFUSE  - v0420  - 0420 PDF 英文 下载

Littelfuse多种汽车电子保护器件,助力实现稳健的车载通信

本文介绍了多种汽车电子保护器件,包括TVS二极管阵列、瞬态抑制二极管、ESD抑制器和自恢复保险丝,旨在提高汽车系统的安全性、便利性和舒适性。

原厂动态    发布时间 : 2024-04-14

【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

选型指南  -  LITTELFUSE PDF 英文 下载

【选型】RS-485接口的防雷设计电路,该如何选择保护器件?

本文介绍使用力特公司的气体放电管、PPTC和TVS来设计防雷电路,有效保护RS-485总线。

器件选型    发布时间 : 2017-06-21

【产品】力特全新电子保险丝保护集成电路系列,包括四种多功能电路保护器件,适用于各类消费电子产品和数据通信接口

力特电子保险丝保护集成电路采用了创新设计,可提供广泛的电源输入范围和集成保护。除过压保护外,该系列电子保险丝还能防止过流、短路、浪涌电流、反向电流和过热事件,并具有实时诊断功能——所有功能全部在一个芯片中实现。

新产品    发布时间 : 2022-10-22

Littelfuse(力特) 连接器&保护器件快速参考指南

型号- LVR100K-240-AP,SESD,RF2943-000,LVR,TM2P-10271-2,2PRO,LVR016S,LVR125S,SESD0802Q4UG-0020-090,LVR012K-2,PESD,LVR200K-240-AP,LVR012S-1,LVR012S-2,RF2945-000,SESD0201X1BN-0015-096,LVR016K,LVR008NS,LVR033K-2,LVR075S-240,RF3923-000,PESD0402-240,LVR100S-240-AP,SESD1004Q4UG-0030-088,LVR008NK,LVR033S-2,LVR125K-240,SESD0402Q2UG-0030-088,RF3917-000,LVR055K,LVR200K-240-2,LVR100S-240,SESD0201X1UN-0030-088,LVR100S,RF3076-000,LVR055S,RF2193-000,SESD1103Q6UG-0020-090,PESD0603-240,LVR100K-240-2,LVR125K-240-2,LVR200S-240-AP,LVM2P-035R14431,SESD0402X1UN-0030-088,LVM2P-015R10431,RF3920-000,LVR200S,RF3078-000,LVR008NS-1,LVR008NS-2,SESD0201X1BN-0010-098,LVM2P-075R14431,LVR100S-240-2,LVR008NK-2,LVR005NS,RF3925-000,LVR005NK,LVR033K,SESD0402Q2UG-0020-090,TM2P-10271,SESD1004Q4UG-0020-090,LVR200S-240,LVR033S,LVR040S-1,LVR100K-240,LVR200K-240,LVR040S-2,RF3918-000,LVR075K-240-2,LVR125S-240-2,SESD0402X1BN-0015-096,PESD1206Q-240,LVR025K-2,LVR040K,LVR012K,LVR025S-2,LVR040S,LVR040K-2,LVR012S,SESD0402X1UN-0020-090,LVR016S-2,LVR016S-1,LVR075S-240-2,LVR016K-2,LVR125S-240,RF3077-000,LVR075K-240,LVR075S-240-AP,LVR075S,LVR075K-240-AP,RF3922-000,LVR005NK-2,SESD0402X1BN-0010-098,RF2192-000,LVR055S-1,LVR075S-1,LVR055S-2,LVR075K-1,LVR005NS-1,LVR005NS-2,LVR125K-240-AP,LVR125S-240-AP,RF2946-000,LVR200S-240-2,PESD0402-140,LVR025K,SESD0201X1UN-0020-090,LVR025S

快速参考指南  -  LITTELFUSE  - 2016年01月01日 PDF 英文 下载

Littelfuse(力特) 保险丝217,218,617,618系列CE声明

型号- 0218015.HXP,0217.630MXP,0618002.MXEP,0218010.MXP,0217010.,021806.3,0217.500HXP,0218010.,02183.15,0217.032MXEP,0217005.HXP,0218005.HXP,02171.25MXP,02183.15MXP,0618001.MXEP,0217.032,02171.25,0617001.MXEP,0218016.MXEP,061806.3MXP,0217.630,0617001.MXP,0217005.,0218.315,021806.3MXEP,021801.6HXP,0218.032,0218.315MXP,0217015.MXEP,0218005.,06173.15MXP,0218001.,061806.3MXEP,0217015.MXE,0217.500,0617005.,0618.315,021806.3HXP,0218001.HXP,0617001.,021801.6,0617005.MXP,0217010.HXP,0617002.MXEP,217,0618002.MXP,0618001.,218,0218016.,617,618,0617002.MXP,0217010.MXEP,0217015.,061806.3,0617002.,0618001.MXP,0218.032MXEP,06173.15,0218015.MXEP,0618.315MXEP,0218015.,06183.15MXP,0618002.,06183.15

测试报告  -  LITTELFUSE  - 2009年06月19日 PDF 英文 下载

【产品】UL认证L级保险丝!极佳限流性能减少高昂停机成本

KLPC系列可在500%的额定电流下提供最低十秒的延时。

新产品    发布时间 : 2019-07-05

Littelfuse(力特) 最专业最齐全的全球领先保护器件

型号- 1.5SMC540CA,SMBJ,1812L,SMBJ8.5CA,5KP200A,SMBJ51A,SMBJ75A,SMBJ70CA,SG75,SL1411A600A,PLED 5 QFN,5KP40A,5KP64A,AC,1812L020PR,SMBJ40A,SMBJ17CA,SMBJ64A,1.5SMC200CA,1.5SMC36CA,5KP18CA,1.5SMC13CA,5KP51A,5KP75A,SMBJ160CA,0312005.MXP,0456040.DR,5KP8.5CA,K1500GRP,1812L110/33MR,SMBJ85A,SMBJ28CA,5KP160CA,CG3,K2200G,5KP78A,1.5SMC510A,60R110XU,5KP,5KP28CA,SMBJ300A,5KP30A,CG35.0,5KP54A,SMBJ150CA,MDCG-4,1206L012WR,1206L110WR,1.5SMC8.2CA,SMBJ16CA,1812L150/12DR,5KP70CA,5KP17CA,CG35.0LTR,5KP180CA,CG32.0,K1100GRP,5KP60A,1.5SMC7.5CA,SMBJ170CA,1.5SMC27CA,SMBJ400A,K1200E70,1.5SMC91CA,SMBJ60A,SMBJ15CA,1.5SMC180CA,1.5SMC400A,5KP16CA,1.5SMC15CA,1.5SMC9.1CA,1.5SMC6.8CA,SL1411A800A,SMBJ26CA,SMBJ400CA,1.5SMC300A,60R050X,60R,5KP26CA,SMBJ90CA,1.5SMC300CA,SL1411A800,1.5SMC530CA,60R010XU,SMBJ70A,SMBJ14CA,1.5SMC530A,5KP170CA,60R075X,60R160X,5KP15CA,5KP85A,1.5SMC16CA,1.5SMC39CA,SM24CANA-02HTG,60R090XPR,1.5SMC82CA,SMBJ48CA,60R300X,1.5SMC200A,5KP12A,5KP36A,5KP24A,5KP48A,1.5SMC36A,1.5SMC24A,1.5SMC12A,0452002.,5KP48CA,5KP200CA,1.5SMC510CA,K2200SRP,SMBJ130CA,SM24CANA,5KP6.5CA,5KP90CA,1.5SMC11A,SMBJ13CA,1.5SMC540A,5KP190CA,SMBJ36CA,5KP11A,1.5SMC47A,0456030.ER,1812L075/33DR,5KP14CA,SL1411A,048502.5,SMBJ24CA,1.5SMC440A,1812L050PR,5KP14A,1.5SMC170CA,5KP26A,CG31.5LTR,CG31.5,5KP24CA,SMBJ90A,SMBJ12CA,1.5SMC400CA,1.5SMC550A,SMBJ58CA,5KP13A,SMBJ188CA,1.5SMC13A,SMBJ350CA,0452001.,1.5SMC18CA,5KP8.0CA,5KP13CA,5KP36CA,AC120,SMBJ5.0A,1.5SMC220A,1812L150/24,0312.062MXP,048502.5DR,K2400G,SMBJ180A,1.5SMC16A,312,SL1411A470A,1.5SMC150CA,5KP20A,1206L035YR,045803.5,1206L050/15YR,5KP100CA,SMBJ11CA,1.5SMC100A,V05E17P,SL1411A090,5KP7.5CA,1.5SMC39A,1.5SMC27A,1.5SMC15A,5KP190A,K1500SRP,5KP210CA,K1500E70,0452007.,5KP12CA,5KP58CA,5KP43A,1.5SMC62CA,SMBJ22CA,SMBJ45CA,CG32.0LTR,452,5KP22A,1.5SMC18A,5KP58A,SMBJ170A,SMBJ10CA,456,458,LV ULTRAMOV,K1500,1206L150PR,60R090X,5KP22CA,5KP45CA,5KP10A,K1200G,5KP5.0A,CG31.01,1812L200DR,SMBJ6.0A,1.5SMC110A,SMBJ33CA,SMBJ250CA,5KP45A,1206L150THWR,5KP33A,5KP9.0CA,5KP180A,5KP11CA,SL1411A350A,1.5SMC160CA,0452005.,SMBJ5.0CA,5KP6.0A,60R110XMR,SMBJ220CA,1.5SMC250CA,1.5SMC480CA,5KP110CA,60R075XPR,045602.5,SMBJ160A,0456030.,1812L200THPR,5KP6.0CA,1.5SMC51CA,K2200GRP,1.5SMC120A,1.5SMC75A,SMBJ78CA,1.5SMC51A,SG300,1.5SMC350A,60R110X,5KP10CA,SMBJ43CA,5KP170A,SMBJ20CA,1.5SMC9.1A,1812L110,5KP33CA,0458007.DR,SMBJ7.0A,1.5SMC30A,1.5SMC480A,1.5SMC,1206L160ZR,1.5SMC250A,TMOV25SP115E,5KP20CA,5KP43CA,SMBJ54CA,SG,SMBJ18A,1812L075/24DR,5KP220CA,1812L010DR,0456040.,1206L200,SMBJ150A,1206L050YR,1.5SMC75CA,60R160XF,0458007.,0452007.MRL,SMBJ6.0CA,1.5SMC130A,5KP160A,K2000F1,SMBJ100CA,1.5SMC7.5A,1.5SMC8.2A,1812L050/30PR,1.5SMC6.8A,5KP78CA,0452001.MRL,0456020.ER,1.5SMC20A,SMBJ6.5A,5KP7.0CA,5KP16A,SMBJ16A,SMBJ30CA,1.5SMC68A,5KP28A,SMBJ28A,1.5SMC56A,5KP6.5A,1812L200,SMBJ188A,K1200,5KP7.0A,SMBJ8.0A,1.5SMC30CA,1.5SMC43A,5KP150A,SMBJ440CA,5KP54CA,SMBJ64CA,60R300XF,5KP15A,K2400,SMBJ17A,1812L300MR,1.5SMC350CA,1206L110,SMBJ250A,SMBJ120CA,1.5SMC43CA,5KP8.0A,1.5SMC20CA,1.5SMC22A,1.5SMC10A,5KP250A,5KP64CA,SMBJ14A,SMBJ75CA,SMBJ26A,5KP18A,1812L300,0456020.,SMBJ110CA,0458001.,SMBJ7.0CA,K1100,SMBJ130A,1.5SMC130CA,0312002.MXP,SL1411A470,SL1411A350,1206L016,SMBJ7.5A,1.5SMC33A,5KP120CA,1.5SMC150A,SMBJ40CA,5KP30CA,SMBJ15A,5KP17A,1206L012,1206L075/13.2WR,K1500G,SMBJ9.0A,045803.5DR,0312035.MXP,SMBJ12A,SMBJ51CA,60R185X,5KP40CA,SMBJ36A,SMBJ24A,SMBJ48A,0452002.MRL,MDSR-10,SMBJ350A,1.5SMC110CA,SMBJ120A,1.5SMC91A,TMOV25S,SMBJ6.5CA,60R030XU,5KP130A,0312002.,1.5SMC160A,5KP75CA,1206L150,SMBJ13A,SMBJ85CA,K2200,1206L035,5KP7.5A,0456025.,1812L075,5KP250CA,SMBJ8.0CA,K2400SRP,1.5SMC22CA,SMBJ8.5A,0452005.MRL,5KP130CA,1.5SMC82A,60R030X,1206L160,SMBJ22A,60R250XF,5KP85CA,SMBJ58A,K2400E70,5KP70A,SMBJ110A,5KP8.5A,1.5SMC68CA,SL1411A600,SMBJ300CA,1.5SMC170A,1.5SMC33CA,1.5SMC10CA,1206L075THYR,5KP9.0A,5KP120A,1206L016WR,SMBJ10A,1206L050,1812L050,0456025.ER,5KP51CA,SMBJ11A,0312005.,SMBJ220A,SMBJ180CA,1.5SMC56CA,1.5SMC120CA,KXXXZY,1206L,K2000E70RP3,SMBJ43A,5KP220A,SMBJ7.5CA,1.5SMC440CA,60R250X,0458001.DR,SMBJ100A,1.5SMC550CA,1.5SMC180A,1.5SMC11CA,5KP5.0CA,5KP110A,SMBJ20A,5KP150CA,SMBJ45A,SMBJ33A,K2000,SMBJ9.0CA,1206L200PR,SMBJ60CA,0458001.DRA,1.5SMC100CA,1206L075,1812L150,SMBJ440A,5KP90A,0312035.,1.5SMC62A,SMBJ200CA,5KP210A,SM24CANA-02,SMBJ78A,60R010X,5KP60CA,60R050XPR,1.5SMC47CA,1.5SMC24CA,1812L020,60R185XF,SL1411A090C,0312.062,SMBJ30A,SMBJ18CA,1.5SMC220CA,5KP100A,SMBJ54A,0312.187,1812L110/16DR,SMBJ200A,1.5SMC12CA,1812L010

培训文档-商品应用及供应商介绍  -  LITTELFUSE  - 2016年01月01日 PDF 中文 下载

如何选择保险丝的额定电流参数?

根据电路的额定工作电流来选择保险丝的额定电流即额定电流=工作电流/0.75。当计算出的值不是规格书中常见的额定电流时,应选择最临近额定值的较高值。

技术问答    发布时间 : 2017-10-10

Littelfuse(力特) PCB安装保险丝座数据手册

型号- 01530033Z,01530008_,01530007_,01530032Z,01530031Z,01530009Z,01530008Z,01530009_,01530007Z,01530009LXN,01530008LXN,01530007LXN,01530031_,01530033_,01530032_

数据手册  -  LITTELFUSE  - Rev: 111616 PDF 英文 下载

Littelfuse(力特) 216系列保险丝数据手册

型号- 021612.5MXP,0216.250MXEP,0216.200MXP,0216.630MXP,0216.080MXEP,0216.800XEP,0216010.MXP,02161.25MXEP,0216.063MXEP,0216.500MXEP,0216.800MXP,0216.630,021606.3MXP,0216001.XEP,021612.5,0216.100MXP,0216.160MXEP,0216.200MXEP,0216.630XP,0216001.,02161.25,0216.050MXP,021601.6MXEP,0216004.MXP,0216.315MXEP,021602.5HXP,0216002.MXEP,02163.15MXEP,0216005.MXP,0216008.MXEP,0216016.MXEP,02163.15MXP,0216010.MXEP,021602.5,0216.630MXEP,0216005.MXEP,021606.3,021602.5MXEP,0216.063MXP,0216.315MXP,0216.200,0216010.,021606.3MXEP,0216.250MXP,0216.080MXP,0216.050MXEP,0216XXXXMXEP,0216016.XEP,0216.500MXP,0216 000XP,0216016.MXP,0216.125MXP,0216001.HXP,216,0216.050,0216008.MXP,0216.100MRET1P,02161.25MXP,0216.125MXEP,021602.5MXP,0216.050XEP,021601.6MXP,021601.6,0216001.MXP,0216.100MXEP,021612.5MXEP,0216004.MXEP,0216.100,0216.800MXEP,0216016.,0216002.MXP,0216001.MXEP,0216.160MXP

数据手册  -  LITTELFUSE  - Revised: 04/12/17  - 2017年04月12日 PDF 英文 下载

【选型】Littelfuse(力特) 保险丝附件快速选型参考指南

型号- 111512,122090,5200001,111510,345101SHOCKSAFE,254131,102080,122093,FH503,PTF010,150318,111,150319,232,595,PTF015,150316,233,354,596,150317,234,235,356,477,598,150315,52000001009,359,239,100058,254011-008,150274,111501,4450718,122088,122087,111506,111505,51900001009,122083,PTF020,10207101009,OMN002,400,OMN004,369,523,OMN006,646,150322,647,FC51,649,804,807,345121,808,102064,FH604,101010,370,PTF078,52100001009,FH602,PTF077,372,373,PTF075,374,5710000000,377,652,254101,656,810,101002,520002,811,101003,658,813,00300210,814,FB65,FB66,102074,102076,520005,PTF080,102079,520004,102078,520003,254121,NY61AP,382,102071,262,383,385,121004,662,663,121001,268,664,269,665,121003,303,121002,35409,FB55,35408,35406,FB58,445073,PTF050,392,272,273,274,395,396,155,397,398,278,219XA,279,312,313,830,314,556,831,557,520101,559,834,LH61A800,101001,0CT136,PTF065,285,560,562,322,564,445,326,208,209,605,04450001,PTF0080M,254201-208,030201,332,213,576,852,215,853,216,217,218,617,618,51800001009,PTF045,150307,100,150308,OCT136,862,225,354252,150300,229,505,506,508

快速参考指南  -  LITTELFUSE PDF 中文 下载

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ATL半导体液冷器定制

可定制ATL TE Cooler制冷量范围:50~1000W;工作电压:12/24VDC;控温精度≤±0.1℃;控温精度:≤±0.1℃;尺寸:冷面:20*20~500*300mm,热面:60*60~540*400mm。

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授权代理品牌:接插件及结构件

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授权代理品牌:加工与定制

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