解析PPTC特性和选型

时间： 2024-09-21 来源：韬略科技EMC公众号

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PPTC,Polymer Positive Temperature Coefficent,高分子聚合物正温度系数热敏电阻,自恢复保险丝

一、介绍

PPTC（Polymer Positive Temperature Coefficent），学名：高分子聚合物正温度系数热敏电阻。PPTC主要用于电子设备的短路及超载保护，与传统保险丝相比，具有可恢复功能，故又称为自恢复保险丝。

PPTC主要是由聚合树脂和导电材料所组成。在正常工作条件下，其表现出极低的电阻值，对电路性能基本上不会产生影响。

当异常电流发生或环境温度提高时，其阻值迅速提高，呈现高阻抗的状态，从而限制异常电流流过PPTC元件，此过程称为“动作”。

当故障得到排除后，PPTC元件自动恢复到低阻状态，此时电路又可以回到正常工作的状态。

二、特性

由聚乙烯（Polyethylene）及导体（主要成分为碳黑Carbon Black）所组成。在正常的操作温度下，聚乙烯紧密地将导体包裹在结晶状的结构内，而形成一条低阻抗的导电通路如图中的(1a)所示。因为阻抗相当的低，所以线路上流经PPTC组件的电流所产生的热能小，不会改变聚乙烯的晶体结构。异常电流发生，导体上所产生的热能便会将聚乙烯由结晶状变成胶状（Amorphous)，如图中的(1b)所示，在此种情况下，被包裹的导体便会因聚乙烯的膨胀而分离，导致阻抗迅速提高而限制异常电流流过PTC组件。异常电流消失后，导体通路又会再度结合成为低阻抗。

三、PPTC的选型

首先要根据产品具体的工作电流、电压来选择一个适合的型号，再看产品实际的工作温度大概是多少度。

【从PPTC的特性来看】：

首先要根据产品具体的工作电流、电压来选择一个适合的型号，再看产品实际的工作温度大概是多少度。

温度越高器件开始动作的电流就越小，即当我们选用1A的参数器件开始动作，且工作环境温度达到60摄氏度时，器件的电流折减率达到70%即0.7A器件就会开始动作。故而我们选型的时候工作温度如果在一个较高的温度我们要选动作电流值更大一点的。

【PPTC可应用在】：

汽车领域各类产品电源输入端；

照明领域电源DC输入端防止电流过大影响后端电路、温度过高；

电机领域电源DC输入端防止电流电机堵转、温度过高；

3.通讯领域电源DC输入端防止大电流影响后端路等等。

(应用在电机端过流防护pcb图)

四、总结

PPTC可以做到重复使用6000次以上，而且动作时间快、串联在电路中的损耗低。不仅是在电路上起到了一个保护的作用，在对于没有PPTC保护的电路上万一出现了问题烧坏的可能就是某个重要元件了，这也是变相起到了节约成本的作用。

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本文由星晴123转载自韬略科技EMC公众号，原文标题为:电路的保护伞，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- company profile PPTC Resettable Fuse Basic Characteristics One Time SMD Fuse Base Characteristics PPTC Resettable Fuse Series One Time Fuse Series ESD Suppressor Series PPTC Resettable Fuse Cross Reference SMD Solder Reflow Recommendations SMD FUSE Cross Reference

型号- FSMD110-1206R,SMD0805P110SLR,SMD0603P075SLR,SMD1812P300SLR,06 110,FSMD300-2920-R,1812L350SL,MICROSMD075F,RLD16P600GF,SMD1812P150TF/8,SMD1210P400SLR,FSMD075-R,FSL450LF-N,RXEF030,TLC-NSML750,TRE055,MICROSMD050F,MF-NSML700,FSMD150-12R,FRVL017-120F,FSMD370RZ,16R1100G,TLC-USML600,SMD1206P700SLR,TRE050,SMD0805P010TF,60R160,0603L150SL,MF-RX012/250U,06 100,RLD16P185BF,RLD30P090UF,1812L700SL,RLD30P135UF,72R090X,TLC-NSML500,RXEF040,SMD1812P850SLR,MINISMDC110F/16,12 100 1.5,RGEF800,MF-MFMF160,TLC-MSMD150,MF-USMF005,FRH110-250VF,FRU135-30F,FRH080-250VF,TRE040,LVR055S,PICOSMDCHOS,MF-LR190,30R090,MF-R500,TRA1400,MXP370,TRF600-160,FSMD200-1210RZ,FRK065-60F,TRB 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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- LSML2920,TAL180,TRB900,TLC-MSMD260/8,TLC-NSML750,TLC-LSML600/12,TRE055,TLC-LSML600/16,TLC-ZSMD0025/24,TLC-MSMD260,USMD1210 SERIES,TLC-MSMD020,TLC-USML600,TRF020,TRE050,TLC-MSMD035,TAL190,TLC-LSML750/12,TRA800,TRF014,TLC-NSML500,TRF012,TLC-LSML600/24,TRF011,TRF018,TD SERIES,TLC-LSMD600,TLC-MSMD150,TLC-MSMD030,TLC-NSML400/12,TLC-NSMH050/24,TRE160,TRE040,TLC-MSMH110/16,TLC-NSMD005/60,TRA1400,TLC-NSMD100/16,TLC-ZSMD0035 0.035,TRF009,TRF008,TLC-LSMH100/33,TRE035,TRF002,TLC-USML700,TRB1200,TRF006,TLC-NSMD100/24,TLC-MSMD160/24,TRF004,TLC-MSMD160,TLC-ZSMD0025/24 0.,TRC090,TLC-LSMD300D/16,TRE030,TLC-USMD200/8,TLC-MSMD020/50,TLC-MSMH110/24,TLC-MSMD010/30,TLC-NSMD065/16,TLC-FSMD050,TLC-NSMD020/30,TLC-MSMH075/33,TLC-NSML600,TRA900,TLC-NSMD100/12,TRE025,TLC-MSMD160/12,NSMD1206,TLC-MSMD050,TLC-LSMD300D,TLC-NSML380L,TLC-MSMD160/16,TLC-LSMD500,TLC-MSMD020/60,TLC-MSMD150/8,TRE020,TLC-PSMH020/30,TLC-NSMD075/30,TRA1300,TLC-USML500/12,TLC-ZSMD0035/24,TLC-NSMH075,TRC075,TRE375,TRE010,TRF100,TLC-NSML550,TRE017,TRE135,TRE015,TLC-NSMD075/24,TLC-MSMD160/6,TLC-PSML260/8,TRE250,TRE130,TLC-PSMH020/24,TLC-MSMD010/50,TLC-NSMH016/30,TLC-MSMD110,TLC-ZSMD0050/24,TRG SERIES,TLC-USMD110/8,TLC-MSML450/21,TRC185,TLC-NSML300,TRC065,TLC-USMD035/24,TRE125,TLC-NSML350L,TLC-MSMD250/12,TRB090,TLC-USML600/12,TLC-MSMD250/16,TRC060,TLC-MSMD125,TLC-MSMD150/24,MSML1812,TRA1200,MSMD1812 SERIES,TLC-LSML750/24,NSML1506 SERIES,TLC-USML900,TRF200,TRE110,FSMD0603 SERIES,TLC-NSML650,TLC-NSMH050,TLC-ASML075,PSML0805 SERIES,TLC-USML1000,TLC-MSML300/24,TRC050,TLC-MSMD014,TRM075,TLC-MSMD150/16,TLC-LSMH200/33,TLC-MSMD010,TLC-MSMD150/12,NSML1206,TLC-NSML400,TRE100,TLC-USMD075,TLC-LSMD700,TLC-PSML350/12,TLC-NSMD075/16,TRC040,TRC160,TLC-LSML700/24,TLC-PSMD035/9,TLC-ZSMD0011,TLC-NSMD075,TLC-MSMD260/12,TLC-MSMD110/24,TLC-USMH110/24,TLC-ZSMD0015,TLC-MSMD260/16,TRF018U,TRC030,NSMH1206 SERIES,TLC-MSMD110/33,TRB185,TRC035,TLC-ASML050,TLC-PSMD020,ZSMD0201,TRA090,TLC-NSML450L,TRM055,TLC-NSMD010/48,TLC-NSMD200/12,TAL350,TLC-USMH110/30,FSML0603 SERIES,TLC-LSML900/24,TLC-MSMD110/16,TLC-LSMD100/60,TRC020,TLC-PSMD035,TRE200,TLC-USMD050,TLC-PSMD030,TLC-PSMD150,TRC025,TLC-NSMD075/8,TLC-NSMD150/8,TLC-USMD175,TRB050,TAL110,TRM040,TRC017,TLC-ASML050/9,TLC-USMD020,TRC250,TLC-ASML035,TLC-MSMD110/12,TRA075,TRC010,TRC375,PSMD0805 SERIES,TLC-NSMD050,TRC135,TLC-LSMD050/50,TLC-NSMH075/16,LSMD2920 SERIES,TLC-NSMD010/60,USML1210 SERIES,TLC-PSMD005,TRB160,TAL120,MSMD1812,TRM033,TAL250,TLC-LSMD300/33,TRM150,TAL370,TLC-LSMD300/30,TLC-NSML300/12,TLC-PSMD035/12,TRC005,TLC-LSMH400/24,TLC-NSML260/12,TLC-MSMD035/30,TLC-USMD150,TRA185,TLC-PSMD010,TRA065,TRE300,TLC-NSML450/12,TRM025,TLC-USMD035,TLC-ZSMD0050 0.050,TAL140,TLC-USMD110/16,TRA,TAL260,LSMH2920 SERIES,TRC,TRB,TRE,TRG,TLC-FSML300,TRF,TRA SERIES,ASML0402 SERIES,TLC-USMD110/12,TRM,TRA050,TLC-ASML010,TRC110,TLC-USMD005/50,TLC-ZSMD0050,USMD1210,TLC-USMD005,TRM016,LSMD2920,TLC-USMD050/16,TLC-LSMD260/33,TRM012,USMH1210 SERIES,PSMH0805,TAL270,TLC-ZSMD0011 0.011,NSMD1206 SERIES,ASML0402,TLC-ZSMD0015/24,TLC-NSML700,TRA160,TRB250,TLC-MSML900T/20,TRA040,TLC-PSMD075,TLC-ASML020,TLC-NSMD050/8,TRB135,TRM008,TLC-MSMH150/33,TRM005,TLC-MSMD075,TRM125,TLC-USMD010,TD350-1,TD350-2,TLC-ZSMD0011/24 0.,TAL160,TLC-LSML400/24,TAL280,LC-NSMD200/12,TLC-MSML800,TRA1600,TLC-ZSMD0035,TRA030,TRB120,TRC210,LSML2920 SERIES,TLC-USML190,TAL170,TLC-PSMD050,TRA025,TLC-FSMD035/9,TRF SERIES,TLC-ZSMD0025,TLC-MSMD250/8,TRA020,TRE500,TRB110,TRM100,TAL175,TLC-USMD110,PSMH0805 SERIES,TLC-PSML260,TLC-MSML500/21,TLC-LSMD050,TRA135,TLC-NSMD110,TLC-NSML200/12,TRA017,TLC-PSML380,TLC-ZSMD0015 0.015,TLC-FSML100,TLC-MSMD050/30,TLC-MSMD050/33,TRA250,TLC-USMD150/8,TRA010,TLC-NSMD012/60,TRB220,TAL500,TLC-LSMH300/24,TLC-USMD200,TLC-USMD075/8,TLC-NSML350/12,TLC-NSML400L,TLC-MSML500/16,TLC-PSML150,TLC-MSML500/12,TLC-NSMD100,TLC-USMD020/24,USML1210,TLC-NSMH020/30,TRA005,TLC-MSMD014/50,TD250-2,TLC-FSML110,TLC-NSMD025/24,TD250-1,TLC-ASML100,TLC-MSMD050/24,TRA120,TRC300,TLC-USML175,TLC-LSMD075/60,TRM200,TLC-LSMD075,TLC-NSMD025/30,TLC-USML380,TLC-USML260,TLC-FSML200,TLC-MSMD200/12,TLC-LSMD260D,TRA110,TLC-MSMH150/24,FSML0603,TLC-NSML175,TRB200,TLC-MSMD050/16,TLC-PSML125,TAL760,TLC-LSMD185,TLC-USML150,TLC-MSMD200/24,TLC-MSMD200/20,TLC-NSMD200,TLC-USMD005/60,TLC-MSMD200/16,TLC-LSMD030/50,TRA100,TLC-MSML500T,TAL410,TLC-NSML500L,TLC-NSMD035/16,TLC-LSMD250,TRF014U,TLC-PSMD010/24,TLC-NSMD035,TLC-FSML150,TLC-PSMD100,TLC-NSMD150,TRB300,TAL300,TLC-NSMD035/24,TLC-PSML075,TLC-USMH200/16,TRM SERIES,TRC500,TLC-NSMD020,MSMH1812 SERIES,TLC-NSMD025,TLC-MSML750,TLC-PSMD110,NSMH1206,TRE SERIES,TLC-PSML300/12,TRA200,TLC-LSMD125,TAL310,TLC-LSMD150,TLC-LSMD030,NSML1206 SERIES,TRF012U,TLC-MSML350/12,TLC-NSMD012,TRB400,TLC-NSMD010,TLC-NSMD016,TLC-MSMD050/60,TLC-NSML500/12,TLC-ZSMD0015/24 0.,TAL SERIES,FSMD0603,TAL200,TLC-PSML175,TLC-LSMD260,TLC-NSMD012/48,TLC-USML350,TLC-LSML700/12,TRA300,TLC-NSMD005,TLC-FSML260,TLC-MSMD110/8,TRB SERIES,TLC-NSMD035/30,TLC-USML110,TAL210,TAL450,TLC-MSMD300,TLC-LSMH200/24,TLC-LSMD450,TLC-FSMD100,TLC-

2024/6/20 - 竞沃 - 选型指南 - REV.1 代理服务技术支持现货查询批量订货

AEM科技（AEM）车用贴片自恢复保险丝选型指南

目录- Automotive Grade Surface-Mount Resettable Fuse PAS Series Automotive Grade Surface Mount Polymer PTC PAT Series Automotive Grade Surface Mount Polymer PTC

型号- PAT,PAS,PAT0805,PAS1812-110-24F,PAS1812-150-12,PAS1812,PAS2920—300—24F,PAT1206-075KF,PAT1206-010KF,PAS1210-020,PAT1206-050KF,PAT1206-035KF,PAT1210-125KF,PAS1206-200,PAS1812-020,PAS1812-075-24,PAS1812-260,PAT1206-016KF,PAS1206-035-16F,PAS1812-260-16F,PAS1812-300F,PAS1206-016,PAT1210—016KF,PAS1812-014,PAS1812 SERIES,PAS2920-300F,PAT SERIES,PAS1210-010,PAT1210-020KF,PAS1206-050,PAS1210-050,PAS1206—035—16F,PAS1206-012,PAS1210—175F,PAS1812-010,PAS1812-050,PAS1210-175F,PAS2920,PAT1210-150KF,PAS1812-125,PAT1210-050KF,PAS1206-025F,PAS1206-020-30F,PAT0805-016KF,PAT0805-035KF,PAT1210-075KF,PAT0805—010KF,PAT0805-010KF,PAS1812-020-60,PAS1812-110-16,PAT0805-050KF,PAT0805 SERIES,PAS1812-200,PAS2920-300-24F,PAS1812—110—24F,PAS2920-185-33F,PAS1206-020,PAS1210-005,PAS1812-160,PAS1812-150-24F,PAS1206 SERIES,PAS2920 SERIES,PAT1210-016KF,PAT1210-035KF,PAT1210-010KF,PAS1206,PAT0805-005KF,PAS1210-110,PAT0805-020KF,PAS1210-035,PAS1210-150,PAT1206-020KF,PAS SERIES,PAS1210-075,PAS2920-260F,PAS1206-110,PAS1812-250-16F,PAS1812-110,PAS1206-035,PAT1206—016KF,PAS1812-075,PAS1206-150,PAS1812-030,PAT1210-110KF,PAS1812-150,PAS1206-075,PAS1812-050-30F

October 2021 - AEM科技 - 选型指南代理服务技术支持现货查询批量订货

【选型】竞沃(TLC) 过流保护产品(PPTC/FUSE/ESD/CSR/TVS)选型指南（简版）

目录- PPTC自恢复保险丝产品一次性保险丝产品 Power TVS与ESD半导体静电抑制器 ESD静电抑制器与电流感测电阻CSR TLC产品应用领域

型号- 04 100,06 110,SMDJXXA,SMBJXXA,0402,PC01,PSMD 0805,HV610,LMMT0,12 100,HFM0,TLV SERIES,HV110.PV,PTN102H05B,TAL SERIES,06 100,USML1210,TD SERIES,LCT0,LSMD 2920,PTN102U05B,HET0,HV620,SMDJXXCA,BEV7,BEV5,PSML0805,TRB SERIES,TRA SERIES,TRE SERIES,HEET0,USMD 1210,PB01,FSML0603,HV510,HV630,HV110,MSMD1812,PTN205U05A,TLS SERIES,62720,EV1845,TRF SERIES,10800,ESDAC05,NSMD1206,HV520,SMFXXCA,12110,TVS SERIES,SMAJXXCA,42510 ESD-LVC,5.0SMDJXXCA,NSMD 1206,SMFXXA,USMD1210,06100,LMJ12,HV530,LSMD2920,LMJ10,12113,HV650,SMBJXXCA,SRC39,ANL SERIES,SMAJXXA,0603,TRM SERIES,PTN062H05B-M,62 720,PTN2510U05A,ASML0402,TRG SERIES,SRC25,MSMD 1812,HCT0,LET0,NSML***L1505,SMCJXXA,LMT0,LMJ25,HFMM0,MSML1812,SMCJXXCA,TRC SERIES,04100,PSMD0805,FSMD0603,FSMD 0603,SRC59,10 800,NSML1206,5.0SMDJXXA,PVAH1U,2410,06110,12 113,12100,12 110

2018年 - 竞沃 - 选型指南 - REV.1 代理服务技术支持现货查询批量订货

PBT Series Surface-Mount Resettable Fuse

型号- PBT1210-020,PBT0805-020,PBT1206-020,PBT1210-125,PBT0805-005,PBT1210-075,PBT1210-150,PBT,PBT1210-050,PBT1206-050,PBT1210-035,PBT1210-110,PBT1210—016,PBT1210-010,PBT0805-010,PBT1206-010,PBT1206—016,PBT1206-075,PBT1210-016,PBT0805-035,PBT1206-035,PBT0805-016,PBT1206-016,PBT0805—010,PBT0805-050,PBT SERIES

Jul. 2023 - AEM科技 - 数据手册代理服务技术支持现货查询批量订货查看更多版本

【产品】额定工作电压16~60V的维安车规级PPTC，电机堵转电流最大可达35A，可有效解决电机过热问题

PPTC保护方案是中小型直流电机的主流保护方案之一，汽车电机过热可能会损坏烧毁，将PPTC器件安装在靠近马达或者线圈的位置，电机堵转时的热量，将有利于PPTC器件更快的起到保护作用。额定工作电压16~60V的维安车规级PPTC，电机堵转电流最大可达35A。

2023-09-05 - 产品代理服务技术支持现货查询批量订货

PBS Series Surface-Mount Resettable Fuse

型号- PBS2018-050,PBS1206-020-30F,PBS2920-110F,PBS2920-300F,PBS2920-260-16F,PBS2920-600-12F,PBS0805 SERIES,PBS1206-016,PBS1812-200,PBS0603,PBS1206-012,PBS1812,PBS0805,PBS0603-025F,PBS0805-050F,PBS1812-150-12,PBS1206-050,PBS1210-035,PBS2920-300-24F,PBS0805-010F,PBS2920-300-16F,PBS1210,PBS1210-110,PBS2920-125-33F,PBS2920-185-33F,PBS1210-075,PBS1812-075-24,PBS1210-150,PBS,PBS1206-035-16F,PBS1812-150-24F,PBS0603 SERIES,PBS2920-125F,PBS2920-185F,PBS1812-260-16F,PBS1812 SERIES,PBS1812-050,PBS1812-010,PBS1812-014,PBS0805-010-24F,PBS SERIES,PBS1206,PBS1206-020,PBS0603-020F,PBS0805-075F,PBS1210 SERIES,PBS1812-050-40F,PBS1210-020,PBS0805-035F,PBS2920-400-16F,PBS2920-330F,PBS2920-185-24F,PBS2920-075F,PBS1812-110-24F,PBS1812-260,PBS2920-260-06F,PBS1812-020,PBS1812-075-33F,PBS1812-300F,PBS1812-020-60,PBS1206-035,PBS1206-110,PBS0603-035F,PBS1206-075,PAS2920-300-24F,PBS2920-330-24F,PBS1206-150,PBS2920-330-12F,PBS2920-260F,PBS0805-020F,PBS1210-010,PBS2018-260-24F,PBS2018-100-33F,PBS1812-110-16,PBS1210-050,PBS2920-200F,PBS2920-500-16F,PBS2920-330-16F,PBS1206-025F,PBS1812-150,PBS2920-150-33F,PBS1812-030,PBS1812-075,PBS1210-175F,PBS1812-110,PBS2018-200,PBS2920-200-24F,PBS1206-200,PBS1210-005,PBS0805-110F,PBS1812-250-16F,PBS0603-010F,PBS2920-150F,PBS1812-050-30F,PBS0603-050F,PBS1206 SERIES

Jan. 2024 - AEM科技 - 数据手册代理服务技术支持现货查询批量订货