【技术】一文解析保险丝的工作原理

时间： 2022-08-23 来源：全业电子

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保险丝是一种保护电器的电子元件。它通常串联在电路中。当故障电流增加到一定值时，其自身熔断并切断电路，以保护电路中的其他设备。保险丝是电路过电流保护组件中最常用的部件。传统的保险丝主要由两端有金属连接端子的管体和管道中的金属熔体组成，大部分保险丝呈圆柱形，称为管状结构。

但如今，随着高科技的快速发展，一些特殊材料得到了很好的应用。保险丝行业已经开始向产品的微小方向发展，出现了一系列新产品，如贴片保险丝、表面粘合保险丝等。那么保险丝的工作原理是什么？下面全业电子小编为大家讲解一番。

保险丝的工作原理

当保险丝通电时，由于其自身的电阻，电能转化为热量，使熔体加热。同时，电流产生的热量通过熔体和外壳辐射到周围环境，并通过对流和传导散热。当保险丝通过允许的工作电流时，散发的热量与产生的热量平衡，热量不会积聚在熔体中，使熔体温度升高，因此保险丝不会达到熔点。

当保险丝通过的电流达到一定数值时，由电能转化的热量增多，散热速度跟不上发热速度，这些热量就会在熔体上逐渐积累，使熔体温度升高，当温度达到熔丝的熔点时，熔丝开始熔化并继续吸收热量进一步熔化变成液态，随后熔丝温度进一步升高到汽化点形成电弧，电弧是一种气体游离放电现象，电弧的强弱与电路的电压有关，电压越高电弧越强，保险丝的额定电压主要区别在于保险丝熔断时能承受的电路电压不同，保险丝不能用于高于其额定电压的电路中，因为电路电压高于保险丝额定电压时电弧不容易熄灭。

另外，电弧的强弱还与电路中的电流有关，电流越大则电弧越强。如果不能及时将电弧熄灭，不仅无法切断电路，还可能烧毁电路中其它部件，从而导致火灾发生，造成事故。高防爆型保险丝是用加装防爆砂的方式使电弧熄灭，电弧熄灭后保险丝才真正切断电流，达到保护其它设备的目的。

以上内容主要介绍保险丝的工作原理。如需要保险丝相关产品如贴片保险丝、方形保险丝、圆形保险丝、一次性保险丝、自恢复保险丝请联系世强平台工作人员帮您选型。海量保险丝现货库存，欢迎免费拿样测试。

深圳全业电子有限公司是一家台湾品牌的过压过流保护器件、半导体器件等电子元器件原生产厂家研发、生产、销售为一体技术企业，二十年以来主要生产ESD防静电保护二极管、TVS瞬态抑制二极管、GDT陶瓷气体放电管、插件自恢复保险丝、贴片自恢复保险丝、一次性贴片保险丝、圆形保险丝、方形保险丝、TSS半导体放电管、贴片压敏电阻、插件压敏电阻、直插压敏电阻、SPG玻璃放电管等生产产线，专业的销售和工程师团队以及海量现货库存，为客户提供更优质的服务，欢迎咨询合作。

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本文由赵浩亮转载自全业电子，原文标题为:保险丝原理_保险丝的工作原理，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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目录- 公司简介贴片保险丝表面安装快速（延时）保险丝快速径向引线微熔断器和延时径向引线微熔断器快速超小型熔断器和延时超小型熔断器快速玻璃管保险丝和延时玻璃管保险丝快速陶瓷管熔断器和延时陶瓷管熔断器快速熔断器光伏熔断器和底座固定电阻器 AFB系列抗冲击型快动微熔断器 PTC熔断器&电力型铝壳绕线电阻器温度保险丝&热保护器快速熔断器底座及配件线路板/面板安装保险丝座汽车保险丝及底座

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选型指南 - 瑞迈 - 2019/11/4 PDF 中文下载

竞沃（TLC）电路保护选型指南

描述- Founded in 2011, TLC is a Specialized and New Enterprise, the first surface-mounted resettable fuse manufacturer in China, the leader of PPTC industry, and a professional manufacturer of circuit protection components. Its main products include PPTC, SMD Fuse, TVS and ESD, NTC, WSF three-terminal Fuse, EVFuse and the other protective elements.

型号- PSMH0805 SERIES,LSML2920,AB20,EVR500-18,5HVB SERIES,F06F SERIES,EVF500-38,JWEN3,JWEN2,JWEN06,TSQF07 SERIES,JWET143-SERIES,EVF1000-25,F12TH SERIES,TDH SERIES,P6KE SERIES,TAB SERIES,AB19,F12FH,30KP SERIES,TA3VT,USMD1210 SERIES,P4KE,EVF500-30,AB10,AB11,AB29 SERIES,10HVA SERIES,P4SMA SERIES,TLV SERIES,10HVC SERIES,TDF SERIES,EVF500-25,TAF SERIES,P12S,TA3VF,EVS750-3624 SERIES,USML1210,EVS1000-2039,F06F_TH,JWEN2510,WTHC SERIES,5.0SMDJ SERIES,20KP,TD SERIES,AB29,AB10 SERIES,AN478 SERIES,EVR500-30,EVS750-4533,TB SERIES,EVF1000-30,20KP SERIES,SMCJ SERIES,F12FH SERIES,SMDJ,1.5SMC,EVR750-30 SERIES,EVR500-40,6HVD SERIES,EVR1000-40,10HVE SERIES,EVR500-40 SERIES,5KP,EVR250-30 SERIES,1.5KE SERIES,TA2VT,EVF500-51,F06T SERIES,SMFJ SERIES,EVR500-18 SERIES,6.6SMDJ SERIES,SMCJ,JWET553-SERIES,TSQF12 SERIES,F12TH,JWEN16,TA2VF,22HVA,F12T,NT52 SERIES,1.5SMBJ SERIES,JWET23-SERIES,SMF4J,NSMD1206,1.5SMBJ,ANT SERIES,EVR250-18,ANMZ SERIES,ANMZ,5HVB,5HVA,EVR750-40 SERIES,EVS750-3048 SERIES,EVS1000-4533 SERIES,SM6S,AB29N,30KP,P6SMB SERIES,JWET353-SERIES,F04F,15KP,TRM SERIES,F12 SERIES,TRG SERIES,AB11N SERIES,EVF500-25 SERIES,AB19.N SERIES,EVR750-40,AB09 SERIES,MSMH1812 SERIES,NT55 SERIES,WSFB,10HVF,WTHC,WSFC,10HVE,EVS1000-3048,WSFD,EVR1000-40 SERIES,EVS1000-2039 SERIES,NSMH1206,TRE SERIES,SQT L SERIES,SMFJ,EVS500-3624,JWEP8,10HVB,JWET26-SERIES,10HVA,AN498,10HVD,10HVC,JWET143,NT55,FSML0603 =,EVS750-2039,NSML1206 SERIES,EVR750-18 SERIES,NT51,MSML1812,NT52,MSMD1812 SERIES,EVF750-51,EVS500-4533 SERIES,JWET23,NT58 SERIES,NT58,F06F_TH SERIES,NSML1506 SERIES,5KP SERIES,TCSM SERIES,SM8S,8KP SERIES,FSMD0603 SERIES,SQT M,EVR250-40,TCSP SERIES,SQT L,TAL SERIES,3KP,JWEN2-SERIES,TLS,F06F,TA3VF SERIES,TCSA,PSML0805 SERIES,FSMD0603,EVF750-51 SERIES,TLV,WSFD SERIES,JWEN2510-SERIES,TCF SERIES,6HVA,F12,6HVC,EVS500-2039 SERIES,NSML1206,TCSMA,6HVB,PESD0402,JWEN16-SERIES,TRB SERIES,EVR250-30,P4KE SERIES,P8S SERIES,SM6S SERIES,8.0SMDJ,EVS500-3048,5HVA SERIES,JWET363,F12F_TH,EVF750-25 SERIES,EVF750-30,PESD0603 SERIES,EVF1000-25 SERIES,AB19.N,AB19 SERIES,EVF750-38,NSMH1206 SERIES,8.0SMDJ SERIES,SMF4J SERIES,6HVE,6HVD,ZSMD0201,MSMH1812,JWET563-SERIES,JWET353,TCST SERIES,TCSF,6HVC SERIES,6HVA SERIES,F06T,SQT M SERIES,FSML0603 SERIES,TCSP,EVF1000-30 SERIES,TCSM,JWET26,JWED5,TA2VF SERIES,TABF SERIES,EVF750-25,JWED9,TCST,EVS750-3048,EVS500-3048 SERIES,EVS750-2039 SERIES,JWED1,JWEN06-SERIES,PSML0805,F06FH SERIES,EVF750-30 SERIES,TCSF SERIES,SM8S SERIES,EVR750-30,NTS,EVS1000-3624 SERIES,JWED5-SERIES,6HVE SERIES,JWEN3-SERIES,PSMD0805 SERIES,TABF,EVF750-38 SERIES,EVS1000-3048 SERIES,10HVF SERIES,LSMD2920 SERIES,JWED9-SERIES,TCH SERIES,JWED1-SERIES,USML1210 SERIES,MSMD1812,TBF SERIES,10HVB SERIES,P12S SERIES,5.0SMDJ,WSFB SERIES,TA SERIES,EVS750-4533 SERIES,TEF SERIES,P8S,MSML1812 SERIES,PESD0603,EVS1000-3624,AN478,EVR750-18,SMBJ SERIES,TAB,TE SERIES,EVF500-51 SERIES,TAF,AB20 SERIES,EVS500-2039,TAL,F06FH,JWET563,TRA,LSMH2920 SERIES,TRC,TRB,TRE,EVS750-3624,TRG,TRF,EVS500-3624 SERIES,TRA SERIES,ASML0402 SERIES,TRM,F04F SERIES,AN498 SERIES,EVR500-30 SERIES,WED3,USMD1210,TA3VT SERIES,TBF,LSMD2920,EVR250-40 SERIES,8KP,15KP SERIES,PSMH0805,USMH1210 SERIES,SMA6J SERIES,JWET553,NSML1506,EVF500-30 SERIES,AB20U,WSFC SERIES,NSMD1206 SERIES,ASML0402,NT51 SERIES,EVS1000-4533,EVF500-38 SERIES,TRC SERIES,TA2VT SERIES,TCF,ANC,SMAJ SERIES,1.0SMBJ SERIES,TCH,TCSMA SERIES,ZSMD0201 SERIES,AB29N SERIES,ANT,WED3-SERIES,JWET363-SERIES,F12T SERIES,EVR250-18 SERIES,NTS SERIES,JWEN2010-SERIES,AB20U SERIES,TSQF07,LSMH2920,LSML2920 SERIES,TDF,TCSA SERIES,TDH,PSMD0805,1.5KE,ANC SERIES,AB11N,USMH1210,TLS SERIES,10HVD SERIES,P6KE,3KP SERIES,JWEP8-SERIES,JWEN2010,PESD0402 SERIES,6HVB SERIES,TRF SERIES,F12F_TH SERIES,6.6SMDJ,TEF,AB09,AB11 SERIES,SMDJ SERIES,TC SERIES,22HVA SERIES,TSQF12,1.5SMC SERIES,EVS500-4533

选型指南 - 竞沃 - REV.1 - 2024/6/20 PDF 中文下载

Vicfuse（威可特）成立于1999年，秉持“匠心、匠人、匠品”的理念，致力于电路安全保护产品的研发、生产和销售，通过了IATF16949、ISO9001、ISO14001、QC080000:2017认证，参照MIL-STD-202E标准生产和检验的产品通过了CE、VDE、TUV、RU、UL、CCC、CQC等安规认证。

半导体保护熔断器直流熔断器通用熔断器新源熔断器光伏熔断器通讯熔断器电池熔断器银丝熔断器高压电力熔断器熔断器座熔断器式隔离开关大电流分线盒跌落式熔断器瞬态电压浪涌抑制保险丝贴片保险丝 AEC-Q200合规保险丝微型保险丝管状保险丝警报器保险丝电阻型保险丝 PPTC自恢复保险丝三端保险丝线路板用保险丝座保险丝夹电器用保险丝座线束用保险丝座保险丝座护套车用保险丝车用线束保险丝座车用保险丝座车用保险丝夹车用静电放电抑制器车用特殊产品电器用过载保护器车用过载保护器电源保护类SPD 数据信号类SPD 同轴RF保护类SPD 超低电容值静电抑制器高速静电抑制器汽车静电抑制器二极管静电抑制器四路静电抑制器温度保险丝温度开关

授权代理商 - 世强先进（深圳）科技股份有限公司线上商城技术资料

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电安科技产品及应用介绍

描述- 电安科技产品及应用介绍

型号- AZ5B25-01F,5.0SMD,SMBJ,MF551,SLVU2.8-4,CQ06PF,MF551A050X,SP1003-01,SLVU2.8-8,SD05-36,TPAU10L-3,TPAU10L-2,TPAU10L-1,CA501,SD05-36C,SF331A040,RCLAMP7538,SMAJ,F0603FA,CC12H,MF551A063X,CQ12LH,SF331,SMF,SF332,SP0502BAHTG,10KPA,TPA323HL,SEF,CQ12LV,AF2 2410,ABC-V,SP3012,F0402 FA,ESD7104,SF331A030,ABC,BP3610A50,ESD8011-D,SP40XX-C,SET,ABE,SMDJ,SF331A025,NSPM2251,SESD1004Q4,BP,FLU,ABP,12KP,SM24CANA-HTG,12CF,SLVU2.8-4BTG,F1206SB,5KP,3216FF,ASM,SF331A020,CC221,TPA23C,TPA323H,5.0SMDJ,BP3610A60,SF331A015,ESD8451,SMCJ,TPA323H-C,UCLAMP3381,SP3030,TM10-621,AZ3028-01S,AZ5A45-01F,SP3022-01ETG,1KSMB,ESD7004,429,AZ3028-04,F1206 HB,ADA,F1206 HA,TF101,TF102,BP3610A30,ESD9XXXST5G-D,TPA23,TPA3810-8L,SPF,MDA,SP1007-01,CQ06LF,MDA-V,TPA1006,SM6S,SF331A080,TPA5235U,TPA323,435,6125FA,314,CA422,437,CC204,438,CC203,CC202,CA421,CC201,8KP,TF111,TF112,BP3610A40,TM10-175,CQ12PF,SRV05-4,TPA1006L1,RCLAMP0524,440,AZ5325-01F,443,324,CA435,325,326,CA433,CA434,AZ5425-04F,CA431,CC213,CA432,CC212,606,CC211,F1206FA,6125TD,TPA0603L,TPA0603G,TM10-320,AZ4007-02,MF551A040X,AZ5015-01F,SM8T,SF331A060,451,452,453,SM8S,TPASRV05-4,SLD8S,454,TPA1006G,TPA23C-24,456,SF331A100,TPA1006H,458,216,SLVU2.8-8BTG,TPA2231H,MF501,BP3610A20,S505,TPAU10L,S501,SP3022-01WTG,3216TD,TPA1006L,SF302,SF303,APA,SF301,466,SF304,501,ESD5581-D,TPA0603,TM10-820,504,505,TPA1255,0603FA,SF331A050,06CF

商品及供应商介绍 - 电安科技 PDF 中文下载

BATTERY ENERGY STORAGE SYSTEMS CAPABILITY GUIDE

型号- LS7R,LS7R SERIES,SPD2 SERIES,JLLN,AF0025 SERIES,PGR-8800,TPSMC,TLS SERIES,SPD2,PSR,TPSMC SERIES,SE-601 SERIES,AF0025,501A,PSX,JLLN SERIES,PSR SERIES,TLS,PSX SERIES,PGR-8800 SERIES,501A SERIES,SE-601

用户指南 - LITTELFUSE - Rev: 031324 - 031324 PDF 英文下载查看更多版本

BATTERY ENERGY STORAGE SYSTEMS CAPABILITY GUIDE

型号- LS7R,LS7R SERIES,SPD2 SERIES,ESR,JLLN,PGR-8800,TPSMC,TLS SERIES,SPD2,TPSMC SERIES,PSR,SE-601 SERIES,501A,PSX,ESR SERIES,JLLN SERIES,PSR SERIES,TLS,PSX SERIES,PGR-8800 SERIES,501A SERIES,SE-601

用户指南 - LITTELFUSE - Rev: 021323 - 2023/2/14 PDF 英文下载

BATTERY ENERGY STORAGE SYSTEMS CAPABILITY GUIDE

型号- LS7R,LS7R SERIES,SPD2 SERIES,JLLN,PGR-8800,TPSMC,TLS SERIES,SPD2,PSR,TPSMC SERIES,SE-601 SERIES,501A,PSX,JLLN SERIES,TLS,PSR SERIES,PSX SERIES,PGR-8800 SERIES,501A SERIES,SE-601

商品及供应商介绍 - LITTELFUSE - Rev: 021323 - 021323 PDF 英文下载

BATTERY ENERGY STORAGE SYSTEMS CAPABILITY GUIDE

型号- LS7R,LS7R SERIES,SPD2 SERIES,JLLN,PGR-8800,TPSMC,TLS SERIES,SPD2,TPSMC SERIES,PSR,SE-601 SERIES,501A,PSX,JLLN SERIES,PSR SERIES,TLS,PSX SERIES,PGR-8800 SERIES,501A SERIES,SE-601

用户指南 - LITTELFUSE - Rev: 021323 - 021323 PDF 英文下载收起

【应用】贴片保险丝SF303成功应用于PD充电器的过流保护上，表面贴装2410封装，公制尺寸6.1x2.5MM

如传统充电器在空间尺寸上没有体积要求，一般在交流AC输入端都串联方型插件的保险丝，来满足过流、短路保护的安规要求，但PD充电器由于体积要求的限制，在保险丝选择方面，工程师们一般都倾向于选择贴片系列的保险丝，如电安的SF303系列，它是2410封装，公制尺寸6.1x2.5MM，串在AC输入端，其焊盘间距尺寸正好能满足安规爬电距离的要求。

新产品发布时间 : 2021-01-19

两轮/三轮电动车简介

型号- SMBJXX/,IXT,HS4040XAQX,438A SERIES,DSSK,440A SERIES,S8016XA,SLD,437A SERIES,SMXJ,MIDI FUSE 70V,59141,CPC1009N,438A,IX2113,DSA,456,USUR1000,AQ4020-01FTG,215,MDSR-10,216,ASMD,SMBJXX,5.0SMDJXX,SD05C,LSIC2SD,TPSMBXX SERIES,SM24CANB,X4340,DSS,TPSMX,TPSMBXX,P3800FNL,437A,881,AQ24CANA-02HTG,BF1881,TRENCHT2,IXF,X2113 -100V,504,505,456 SERIES,SMDC

应用及方案 - LITTELFUSE - 2021/3/3 PDF 中文下载

【元件】额定电流涵盖250mA-20A、分段能力达DC63V的旭程1206贴片保险丝为电子设备提供有效保护

电子产品要求越来越高，不仅要求更小体积，同时也要兼顾更加安全可靠性能，而保险丝就是其中不可忽略的重要组成部件。旭程1206封装片式贴片保险丝，工温-40至125℃，通过UR、ROHS、REACH认证，无卤。

产品发布时间 : 2024-01-09

全业电子（QY Semiconductor）一次性保险丝&塑料插件方形熔断保险丝选型指南

目录- Disposable fuse

型号- QY0603-0750FS,QY2410-1500FS,QY2410-11 OOFS,QY1206-1200TS,QY0603-0500TS,QY2410-1800TS,QY2410TS SERIES,QY2410-1150FS,QY2410-0100TS,QYMSTT3.15A250V,QY2410-1350FS,QY1206-1400TS,QY2410-1315TS,QY2410-0500FS,QY2410FS,QY1206-1800FS,QYMCTT3.15A250V SERIES,QY0603-1100TS,QY2410-2300FS,QY2410-1100TS,QY2410-2250TS,QY2410-2150FS,QY0603-1350FS,QY1206-2250FS,QY2410-1300FS,QY1206-11 OOFS,QY0603-1125FS,QY2410-1600TS,QY2410-2100TS,QY2410-1250TS,QY1206-2100FS,QY0603-1700TS,QY2410-2120FS,QY0603-1200FS,QY0603-1150TS,QYMSTT3.15A350V SERIES,QY0603FS SERIES,QY0603-0500FS,QY1206-2120TS,QY1206-1175FS,QY0603-1800TS,QY2410-2300TS,QY0603-1150FS,QY2410-1315FS,QY2410-1400TS,QY1206-1800TS,QY1206-2300FS,QY1206-2250TS,QY0603-1400FS,QY0603-1350TS,QY1206-1400FS,QY1206-1350TS,QY1206-1250FS,QY0603-1500TS,QY2410-2100FS,QY0603-1600FS,QYMSTT3.15A300V,QY2410-1700FS,QY2410-1200TS,QYMSTT3.15A300V SERIES,QY0603-0375TS,QY1206TS,QY1206-2200TS,QY1206-1150TS,QY1206-0750TS,QY1206TS SERIES,QY0603-0250TS,QY1206-1200FS,QY1206-1450FS,QY0603TS SERIES,QY0603FS,QY0603-1300TS,QY1206-2100TS,QY2410-1250FS,QY2410-0750TS,QY1206-0750FS,QY1206FS SERIES,QY0603-1200TS,QY1206-0500TS,QY2410-2200FS,QY1206-1100TS,QY2410-1630FS,QY0603-1800FS,QY0603-1125TS,QY2410-1400FS,QY0603-1250TS,QY1206FS,QY1206-2150FS,QYMSTT3.15A250V SERIES,QY1206-1700FS,QY0603-1600TS,QY1206-1500FS,QYMSTT3.15A350V,QY0603-1100FS,QY0603TS,QY0603-0750TS,QY2410-0250FS,QY1206-1300TS,QY2410-1700TS,QY2410-1200FS,QY2410-1150TS,QY2410-1630TS,QY2410-2200TS,QY2410FS SERIES,QY2410TS,QY1206-2200FS,QY1206-1300FS,QY0603-1300FS,QY2410-0500TS,QY1206-0250FS,QY1206-1150FS,QY1206-1450TS,QY2410-1500TS,QY0603-1250FS,QY0603-1500FS,QY2410-0750FS,QYMCTT3.15A250V,QY1206-2150TS,QY2410-1800FS,QY0603-0375FS,QY1206-0500FS,QY2410-1350TS,QY1206-0375FS,QY1206-1250TS,QY1206-1500TS,QY1206-2300TS,QY1206-2400FS,QY2410-2150TS,QY0603-1400TS,QY1206-1350FS,QY2410-2250FS,QY2410-1600FS,QY2410-2120TS,QY0603-1700FS,QY1206-2120FS,QY2410-0250TS,QY2410-21 OOFS,QY1206-1700TS,QY2410-1300TS

选型指南 - 全业电子 - 2022/8/31 PDF 英文下载

威可特携环保、高可靠且低功耗的电力电子电路安全保护技术出席2023 SNEC ES+国际储能展

“SNEC ES+第八届（2023）国际储能技术和装备及应用（上海）大会暨展览会”于2023年10月31日-11月3日在上海浦东嘉里大酒店和上海新国际博览中心隆重举行。Vicfuse是一家致力于通过更可靠、更环保、更安全、更可持续的电力电子电路安全保护技术改善人们的生活和环境的国家级高新技术、专精特新企业。

原厂动态发布时间 : 2023-11-23