【选型】力特自恢复保险丝用于车载77G电动尾门雷达电源输入过流防护设计，待机功耗仅0.171W

时间： 2022-10-19 来源：世强

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自恢复保险丝,RF4575-000,ASMDC185F/33,LITTELFUSE

为避免车载77G电动尾门雷达电源输入因负载短路异常造成燃烧风险，一般在电源输入加一颗自恢复保险丝做过流保护设计，选型因素参考如下：额定工作电压：车载12V蓄电池供电，一般以2倍过压考量，建议选择耐压至少24VDC自恢复保险丝设计更安全；额定工作电流：一般与负载功率大小相关，同时考虑高温对自恢复保险丝影响严重，一般要求在高温60℃~70℃条件下保持电流至少1A；低待机功耗，通过AEC-Q200认证。

针对如上需求，推荐选择LITTELFUSE（力特）自恢复保险丝ASMDC185F/33 ，订单料号RF4575-000，2920封装，最大额定工作电压33VDC，常温25℃下保持电流1.85A，在70℃条件下保持电流1.04A，可承受最大故障电流40A，工作温度范围-40℃~85℃，通过AEC-Q200认证，典型电性参数参考如下图1所示。

图1：Littelfuse（力特）自恢复保险丝RF4575-000典型电性参数

推荐理由如下：

低待机功耗：可以通过计算得出，利用P=I_hold*I_hold*R得出，其中自恢复保险丝保持电流I_hold为1.85A，R_min=0.05Ω，R_max=0.15Ω，其中I_hold、R_min和R_max可通过图1中电性参数表格获取，带入公式得到P_min≈0.171（W），P_max≈0.513（W），即待机状态时的功耗为0.171W~0.513W。
通过AEC-200认证，满足车规级认证要求。
市面上有成熟应用，产品性能得到验证。

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LITTELFUSE - 正温度系数热敏电阻,可重置PTC,热敏电阻,自恢复保险丝,PTC热敏电阻,PTC,保险丝,30R135UU,72R300XF,1210L075/24PR,30R090UU,600R160-R1UR,1206L025YR,1812L,1812L350SL,1812L010/60DR,0603L050SLYR,2016L075/60,600R160-RAF,72R160XMR,0603L010YR,60R185XMR,1210L150TH,0805L110SLYR,16R1100G,1210L450SLWR,0402L050SLKR,0603L150SL,30R160UPR,1812L020PR,1206L110/12SL,2920L300DR,1206L175SLYR,72R090X,16R400GPR,16VT210SU,0805L260SLTH,1210L175WR,1812L200/12,LORHO,250S130¨CRCDR,30R300U,1812L200/16,16R1000GF,0805L100,16R250GU,20LR450,250R145-RA,2016L075/60MR,30R090,250R145-RAU,0402L020SL,2920L500/16,1206L260SLTHYR,1812L110/33MR,250S130¨CRC,250S130¨CRB,250S130¨CRA,16R135B,60R110XU,250S130V,2920L330/24MR,0603L075SL,0805L110,1206L175PR,250R145-RB,0603L,1206L012WR,16R500GU,24LT100,1812L150/12DR,1812L200/16DR,16R185BU,1210L380SL,600R160-RAUR,250S130¨CRBDR,30R800UH,15ST175U,250R145ZR,600R160F,16R1000G,16R110BPR,1206L380SLTHYR,16R250GPR,250R120-R3U,600R150-RA,600R150-RB,60R250,60R010,1812L075/33,250R120-R3,250R120-R2,250R120-R1,1210L200,1812L260/16MR,30R250UPR,72R135XMR,16R600GDR,1210L400SL,1206L300SLTHYR,30R700UMR,1206L450SL,250R120-RF,1206L200SLYR,250R120-RC,250R120-RA,0603L035YR,250R120-R2U,0603L175SL,1210L300SLYR,16R800GMR,60R375XH,16R110B,1812L190SLPR,16R1100GF,250R120TU,0805L075SLYR,16R1200G,250R120-RFZR,0402L,2920L200DR,2920L300,600R150F,2920L700SL,250R120-R1U,30R700UF,1210L075YR,2920L700SLPR,1210L110/16WR,60R110,1210L175SLYR,0805L010/24,16R600GU,2920L075/60MR,30R400U,60R050X,72R,60R,0402L010SLKR,72R090XPR,1206L050/15,1206L150SLYR,72R185XMR,2920L260PR,72R250XMR,1206L450SLWR,60R010XU,16VT210S,30R185,1812L075/24,1206L110SL,16R700GKLMR,1206L110TH,60R075X,LT SERIES,0603L100SLYR,1812L370SLPR,16R160BU,0805L110SL,60R025XPR,60R160X,0805L200SLTHYR,30R090UPR,2920L260/24,15LR380U,2920L,2920L185DR,16R500GPR,250R120T,60R090XPR,250R120U,30R300UU,1812L270SLPR,60R300X,1812L300SLPR,30R600U,72R075XU,0603L075SLYR,15LR260U,2016L,0402L020SLKR,06R075BU,06SL370GM,1206L075/16WR,1812L260SL,60R020XPR,20LR730,250R180MR,2920L330/24,06R155BPR,06SL190G,72R040XU,16R400G,1210L110THYR,2920L030DR,1812L160PR,2920L260/24DR,1812L075/33DR,1812L260TH,1210L035YR,1812L270SL,16R135BPR,1206L020YR,1206L075/13.2,30R250,0805L200SLTH,1812L050PR,600R150-RBF,0402L035SLKR,30R600UF,1210L350SL,16R300G,1206L075/13.6,72R075XPR,15LR260,15LR380,16R300GPR,30R185UPR,16R700GF,1812L014DR,60R160XMR,250R145U,0805L,1206L075SL,30R090U,2920L150DR,0805L050WR,1206L150TH,1812L200/12DR,0402L035SL,600R150-RAF,250R145T,1206L150SL,72R300XMR,1206L400SLWR,72R160XF,1812L150/24MR,30R500U,72R030XPR,2920L075DR,1206L075TH,1210L010WR,1812L350SLPR,LR,LT,1812L160/12DR,1812L150/24,60R025XU,2920L400/15MR,16R700GMR,0805L150SLYR,72R050XU,30R,16R1100GMR,60R010XPR,60R090,2920L200/24,1206L035YR,250R145-RBU,1206L050/15YR,16R800GF,1812L150/12,2920L400/15,VT 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SERIES,0805L010/24YR,16R250BPR,1812L370SL,30R160UU,20LR450U,0603L050SL,60R090X,1206L035/16,1210L020WR,1210L110/16,600R160-R1F,0402L010SL,250S130DR,60R185,24LT100U,72R020XPR,1206L150THWR,1210L380SLYR,1206L175SL,16R700GKL,72R300X,2920L050DR,2016L030,60R090XU,1210L110/12,2016L150,250R120ZR,16R185BPR,60R017XPR,1812L75/33,60R110XMR,1206L035/16YR,60R075XPR,60R025X,15ST175,250R180TMR,1812L150ZR,2920L050,1210L005WR,72R375X,1812L260THDR,1812L200THPR,72R050XPR,1812L125/16,12VL175XLU,0805L010YR,30R500UF,1812L75/24,16R700G,16R700GKLF,60R135X,2920L185,60R110X,1210L075,1812L160/12,16R900GF,1812L110,600R150-RBZR,600R,1812L125/6,60R040XPR,250R120-R1ZR,250R120-RFU,16R600G,2920L030,2920L150,30R800U,2016L100,1812L035/30DR,1812L075/24DR,16R135BU,250R120,30R185UU,SL,1812L010DR,2920L125PR,1206L200,1206L050YR,30R185U,ST,0603L150SLYR,1206L380SLTH,60R160XF,72R020X,30R600UMR,1812L300SL,60R050XU,0805L075SL,0805L260SLTHYR,72R250X,06SL370G,30R300,2016L075/060,1210L175,72R020XU,1812L260SLPR,250R180TF,16R1400GH,16R090BU,250R120-RAZR,0805L150SL,1812L050/30PR,30R160U,1210L260SLYR,60R065XPR,0805L020YR,1210L,1206L350SLTHYR,60R017X,1206L075SLYR,1206L110THYR,72R040XPR,2920L250DR,30R500,1210L110TH,1812L110/24DR,250R120-RCU,2016L200,0603L050YR,0805L300SLWR,1812L200,06R155BU,72R250XF,250R145,60R017XU,1812L020/60DR,1812L035/30,0603L050,1812L125/6PR,30R400,1206L400SL,60R030XPR,1210L350SLWR,60R300XF,VL,1206L260SLTH,06R120BU,72R065XU,1812L300MR,1210L400SLWR,VT,1210L450SL,16R,2920L500/16MR,1206L300SLTH,2920L075,250R120-RAU,72R030XU,250S130-RC,250S130-RB,16R110BU,250S130-RA,1812L300,2920L100PR,250S130,30R110UPR,30R250U,1206L110/12SLYR,0805L175SLYR,72R135X,0805L075WR,1206L016,16R500G,1206L150/12SL,0603L175SLYR,30R250UU,30R900U,16R900GMR,72R185XF,16R090B,1206L012,1206L075/13.2WR,600R150-RAZR,72R110X,1210L075/24,72R025X,0805L050,60R065XU,72R075X,1210L300SL,72R160X,0603L020,250R080ZR,72R090XU,1210L200SLYR,250R120TZR,60R185X,0603L025,0805L100WR,06R120B,2920L200/24DR,250R180,30R135U,60R040X,1206L025,06SL190GM,600R160-RA,72R135XF,06R075BPR,1206L020,1210L005,600R160UR,250R145-RBZR,12VL175XL,6,工业电子,消费电子,汽车电子,通信设备

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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

LITTELFUSE - FUSEHOLDER,电子束保险丝,CARTRIDGE FUSES,TELELINK® FUSE,TR5®保险丝,盒式保险丝,SURFACE MOUNT RESETTABLE PPTC,扁白熔丝,MICRO™FUSE /TR3 FUSE,RADIAL LEADED RESETTABLE PPTC,TR5® 保险丝,EBF FUSE,中型保险丝,FUSE,HIGH VOLTAGE FUSE,保险丝和夹子组件,VERY FAST ACTING FUSE,OMNI-BLOK®FUSEHOLDER,OMNI-BLOK®保险丝座,NANO2®保险丝,TE7保险丝,OMNI-BLOK® FUSEHOLDER,THIN FILM FUSE,PICO® SMF保险丝,TIME LAG FUSE,MEDIUM ACTING FUSE,PICO® SMF FUSE,MICRO™保险丝/TR3保险丝,PICO®保险丝/PICO®II轴向保险丝,快熔保险丝,保险丝,TR5®FUSE,CERAMIC CHIP FUSE,PICO®保险丝/PICO®II保险丝轴,FUSE,PICO®FUSE /PICO® II FUSE AXIAL,TE7 FUSE,TELELINK®保险丝,OMNI-BLOK®保险丝盒,FLAT PAK FUSE,表面安装可复位PPTC,2AG FUSES,保险丝座,PICO® FUSE / PICO® II FUSE AXIAL,2AG保险丝,PTC FUSE,NANO²® FUSE,特殊保险丝,高压保险丝,TR5® FUSE,POLYFUSE PPTC,陶瓷芯片保险丝,径向引线可复位PPTC,FAST ACTING FUSE,MICRO™ FUSE / TR3 FUSE,BATTERY STRAP RESETTABLE PPTC,延时保险丝,聚熔丝PPTC,SPECIAL FUSE,FUSE AND CLIP ASSEMBLIES,电池叠片型自恢复PPTC,薄膜保险丝,TE5 FUSE,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,机顶盒,电信,CONSUMER ELECTRONICS,LITHIUM CELL,电池,消费电子,BATTERY PRODUCT APPLICATIONS,智能卡读卡器,COMPUTER,医用电子,SET TOP BOX,BATTERY,COMPUTER,TELECOM,电池组,SMART CARD READER,MEDICAL ELECTRONICS PRODUCT APPLICATIONS,移动电话,CONSUMER ELECTRONICS,锂电池,TELECOM,BATTERY PACK,电脑,MEDICAL ELECTRONIC,MOBILE PHONE

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