【技术】解析PPTC自恢复保险丝电流测试及注意事项

时间： 2023-04-28 来源：优恩半导体官网

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PPTC 自恢复保险丝是一种常用的限流型电子元件，用于保护电路免受过载或短路等问题的损害。要正确地测量自恢复保险丝的电流，我们首先需要了解其结构组成和工作原理。

PPTC通常由两个部分组成：一个是高分子材料，另一个是导电颗粒。高分子材料质地轻巧、原料丰富、性能优良、使用的范围也广，非常适用于承受电流的高温和高压。导电颗粒则是用于控制电流的开关，可以将电流断开或接通。

在自恢复保险丝中，高分子材料受到损坏，电流可能会泄漏，导致电路过载或短路，从而损坏电路。因此，自恢复保险丝的电流测量则变得非常重要。

测量自恢复保险丝的电流需要使用专业的电流测量仪器。测量仪器通常会有不同的量程和档位，以适应不同的电流范围。在测量之前，我们需要选择合适的量程和档位，以确保测量结果的准确性。

除了选择合适的量程和档位外，我们还需要注意以下几点：

1.测量时需要断开电路，以避免电流过大对电路造成损坏。

2.测量时需要使用专业的电流测量仪器，以确保测量结果的准确性。

3.测量时需要注意环境温度，以确保测量结果不受温度变化的影响。

4.测量时需要注意电路的电压范围，以确保测量结果不受电压变化的影响。

综上所述，正确测量PPTC自恢复保险丝的电流对于电路保护和安全使用非常重要。在测量过程中，我们需要注意安全，选择合适的量程和档位，并注意环境温度和电路电压范围等因素。

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本文由犀牛先生转载自优恩半导体官网，原文标题为:【技术贴】PPTC自恢复保险丝电流测试，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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选型指南 - 优恩半导体 PDF 英文下载

优恩半导体（UN Semiconductor）于1994年成立于台湾，专注于ESD静电保护、雷击浪涌保护器件及串口芯片，设有专业的EMC测试整改中心。优恩半导体的ESD、TVS、GDT、MOV、放电管、通信芯片等产品广销全球20多个国家。

ESD静电二极体（ESD）瞬态抑制二极体（TVS）陶瓷气体放电管（GDT）半导体放电管（TSS）玻璃放电管（SPG）压敏电阻（MOV）贴片压敏电阻（MLV）自恢复保险丝（PPTC）熔断保险丝 RS485通讯芯片 RS232通讯芯片 CAN通讯芯片电源保护模组信号保护模组防雷型RJ45网路连接器高速静噪虑波器磁珠高压整流二极体小信号肖特基二极体小信号开关二极体稳压二极体 MOS管双极型电晶体电源管理芯片电源隔离模组信号隔离模组

授权代理商 - 深圳市世强元件网络有限公司线上商城技术资料

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优恩半导体PPTC自恢复保险丝选型表

优恩半导体提供如下技术参数的PPTC自恢复保险丝选型：保持电流0.01A~14A；动作电流：0.03A~23.8A；最大电流：1A~100A，最大额定电压：6V~72V。产品符合rohs标准，小封装为电路板节省了电路板空间。

产品型号	品类	Hold Current I hold (A)	Trip Current I trip (A)	Rated Voltage （V） max Vdc	Max Current I max(A)	Typical Power P dtyp.(W)	Maximum Time To Trip Current (A)	Maximum Time To Trip Time (Sec.)	Resistance R min(mΩ)	Resistance R max(mΩ)
SMD0603-001	Surface Mount Resettable Polymer PTCs	0.01	0.03	60	20	0.50	0.20	1.00	15.00	100.0

选型表 - 优恩半导体立即选型

优恩半导体ESD、PPTC、GDT用于CAN总线浪涌保护，可大幅缩减单板占用体积

优恩半导体在本文将对CAN总线浪涌保护之自恢复保险丝选型进行详细的讲解，为工程师们的设计提供理论基础。

原厂动态发布时间 : 2021-09-21

【技术】浅析PPTC自恢复保险丝在RS485通讯接口的应用

众所周知，PPTC自恢复保险丝是使用极为广泛的一种过流保护元器件，在一些笔记本电脑、汽车电子、以及变压器、工业控制设备，当然，也包括一些通讯接口，PPTC都能起到过电流和过温保护的作用。浅析PPTC自恢复保险丝在RS485通讯接口的应用。

技术探讨发布时间 : 2022-10-17

【技术】关于保险丝常识的有效问答（一）

目前保险丝种类比较常见的就是自恢复保险丝PPTC与一次性保险丝了，关于保险丝呢，不少客户对它也存在很多疑问，本文优恩半导体对此整理出了三个基本常识的有效问答，希望能帮到大家。

技术探讨发布时间 : 2023-01-18

优恩半导体（UNSEMI）ESD静电保护/雷击浪涌保护器件/串口芯片产品选型指南（英文）

目录- Company Introduction ESD Protection Diodes（ESD） Transient Voltage Suppressor（TVS） Thyristor Surge Suppressors（TSS） Sidac Thyristor（SIDAC） Metal Oxide Varistors（MOV） Gas Discharge Tube（GDT） Spark Gap Protectors（SPG） Micro Surge Protection Module（Micro-SPD） Polymeric Positive Thermal Coefficient（PPTC） RS485/422 Transceiver CAN Transceiver RJ45 Modular Jack connectors Small signal devices EMI Protection devices

型号- SMDJ-AT SERIES,UNS3K,07DXXKJ,UN2E8-XXXML SERIES,SMBJ,UN2E5-XXXLL SERIES,40DXXK SERIES,UN232,UN2E8-XXXL HV,4.0SMF SERIES,UN1812-XXXCSMD SERIES,10DXXKJ,5.0SMDJ-AT SERIES,P6KE SERIES,30KP SERIES,SACB SERIES,UNS1K SERIES,PXXXSC SERIES,P4KE,SMD0603 SERIES,10DXXK SERIES,10DXXKEC SERIES,UN490E,UN3E8-XXXHP,UNSDC12V-3L,07DXXK,07DXXL,UN3E5-XXXMSMD,20DXXK SERIES,PXXXSB,15KPS,PXXXSA,PXXXSB-2L,P4SMA SERIES,SA SERIES,SMAJ,UN2220 SERIES,05DXXKJ,SAC SERIES,SMF SERIES,PXXXSC,KXXXSA SERIES,20KP,5.0SMDJ SERIES,0402 SERIES,20KP SERIES,TPSMAJ SERIES,PXXXLB SERIES,SMCJ SERIES,UN3490,P4SMA,UNSDC24V-3L,SMDJ,UNS1K,UN3E6-XXXMM,UN65HVD75,UN2E8-XXXL HV SERIES,SMDT,UN1812 SERIES,UN3220 SERIES,1.5SMC,SA,UN2E8-XXXML,UNS4032 SERIES,UN2E8-XXXHL SERIES,UN2E5-XXXL HV,UNSDC58V-2L,SMD1210 SERIES,PXXXSD1,UN2E5-XXXLSMD,PXXXEC SERIES,UN3485,UN16,5KP,1.5KE SERIES,TP5.0SMDJ,14DXXL SERIES,07DXXKBC SERIES,UNS2K,UN2E8-XXXMSMD,UN2E5-XXXLL HV SERIES,10DXXKEC,UNSDC24V-2L,32DXXL SERIES,14DXXKJ SERIES,UN3E8-XXXHM SERIES,SMCJ,TPSMB SERIES,UN1210-XXXBSMD SERIES,UN3E6-XXXM,TPSMDJ SERIES,UN65HVD233,UN65HVD234,UN65HVD232,UN65HVD230,SMBJ-AT,UN2E5-XXXL,UN2E8-XXXM,UN1210-XXXBSMD,10DXXKJ SERIES,34SXX,KC SERIES,UN2E6-XXXLSMD SERIES,UN2E8-XXXH,UNB-XXXN-SMD,UN3E8-XXXHMF,32DXXKJ SERIES,UN1050,UN3232E,UNA-XXXM-SMD,UN1050ISODUB,PXXXG,32DXXKJ,40DXXK,UNS3220,UNB-XXXM-SMD,40DXXL,UN3085NE,SMCJS,UN2E8-XXXHSMD,TPSMB10J,32DXXK,32DXXL,PXXXEC,UN30,PXXXEB,PXXXEA,30KP,P6SMB SERIES,PXXXSC-2L SERIES,15KP,PXXXSC-2L,0603,SMD2920 SERIES,10SMBT,14DXXKJ,UN82C250,UNSRS485-2HL,UN82C251,10SMBJ,05DXXL SERIES,25DXXL SERIES,TPSMC SERIES,UN2H8-XXXL HV SERIES,UNSDC58V-3L,SM8Z SERIES,TPSMCJ SERIES,SM5Z,UN6,UN3E5-XXXL,UN3088E,KXXXG SERIES,PXXXTB,PXXXTA,UN2E5-XXXLSMD SERIES,KA SERIES,UNB-XXXN-SMD SERIES,UN3088ES,07DXXL SERIES,5KP SERIES,UN3485ISO,8KP SERIES,PXXXEA SERIES,UNA-XXXN/M SERIES,SMCJS SERIES,3KP,SM8Z,UN3E5-XXXLM,SMCJ-AT SERIES,LCE SERIES,UNC-XXXN/M SERIES,PXXXSA SERIES,UNSRS485-2H,SMCJ-AT,25DXXKJ SERIES,UN0805 SERIES,PXXXDM,POE58C,15SMBJ,PXXXTB SERIES,PXXXSB-2L SERIES,UNA-XXXN-SMD,40DXXKJ SERIES,UNS3220 SERIES,UN1206 SERIES,P4KE SERIES,SM5Z SERIES,UN2E8-XXXMSMD SERIES,UN3E6-XXXMM SERIES,05DXXK,05DXXL,UN600 SERIES,1012 SERIES,UNB-XXXN/M SERIES,8.0SMDJ,UNSRS485-2L,P6SMB,SACA SERIES,40DXXKJ,40DXXL SERIES,PXXXDM SERIES,SACA,UN0603 SERIES,SACB,UN2E5-XXXL SERIES,UN2H8-XXXLL HV SERIES,SMD2920,0402,8.0SMDJ SERIES,25DXXL,25DXXK,UN30 SERIES,10DXXL SERIES,20DXXL SERIES,25DXXKJ,5KPS,UNA-XXXN-SMD SERIES,UN485E,UN2E8-XXXHL,PXXXSB SERIES,UN485ES,PXXXTA SERIES,UN3E8-XXXHMF SERIES,UN2H8-XXXLL HV,SMDJ-AT,4.0SMF,SMF,TPSMB10J SERIES,0603 SERIES,5KPS SERIES,UN2E8-XXXH SERIES,KD SERIES,UN60,SMAJ-AT SERIES,TPSMDJ,UN1206-XXXASMD SERIES,UN2E8-XXXHSMD SERIES,UN3232E-T,UN1210 SERIES,14DXXKSC,07DXXKBC,10DXXK,UNSDC48V-2L,10DXXL,53DXXK,UN3E8-XXXHSMD SERIES,2012 SERIES,UN0805,UN3E5-XXXMSMD SERIES,KA,KB,UN1812-XXXCSMD,KC,TPSMCJ,UN2E8-XXXLL HV,KD,6.0SMAJ SERIES,14DXXKSC SERIES,UNS2K SERIES,10SMBJ SERIES,TP5.0SMDJ SERIES,SMD1812 SERIES,UN60 SERIES,5.0SMDJ,UN3490E,UNSDC48V-3L,20DXXKYC SERIES,SMD0603,SMD1812,KXXXSB SERIES,UN1206,UN16 SERIES,SMBJ SERIES,UNSRS422-2H,SMDT SERIES,UN1210,UNSRS422-2L,UN135 SERIES,TPSMBJ,PXXXLC SERIES,UNS4032,0201 SERIES,UN1206-XXXASMD,UN2H8-XXXL HV,5.0SMDJ-AT,UN3E5-XXXL SERIES,20DXXKYC,UN3485S,UN3E6-XXXM SERIES,34SXX SERIES,UN2E5-XXXLL,05DXXK SERIES,0201,UN3E8-XXXHP SERIES,UN3E8-XXXH SERIES,UN1042,UN3220,TPSMAJ,UN1040,UN2E8-XXXLL HV SERIES,15KP SERIES,8KP,UN2E5-XXXL HV SERIES,UN2E6-XXXLSMD,6.0SMAJ,UN3E8-XXXHSMD,32DXXK SERIES,34SXXJ SERIES,SMD1206 SERIES,SMBJ-AT SERIES,TPSMA SERIES,UNC-XXXM-SMD,LCE,UN600,14DXXK,UN6 SERIES,14DXXL,UNC-XXXN-SMD SERIES,UNSRS422-2HL,15SMBJ SERIES,SAC,SMD0805 SERIES,SMAJ SERIES,UN3E5-XXXLM SERIES,UN3E5-XXXLSMD SERIES,UN250 SERIES,UN3E8-XXXH,UN485CUA,UN488E,UN250,KB SERIES,PXXXLC,UN2E5-XXXLL HV,UN135,PXXXLB,PXXXLA,07DXXK SERIES,SMD1206,UN0603,UN1812,20DXXL,20DXXK,PXXXEB SERIES,10SMBT SERIES,1.5KE,14DXXK SERIES,UNC-XXXN-SMD,05DXXKJ SERIES,3KP SERIES,P6KE,07DXXKJ SERIES,UNS3K SERIES,KXXXSD1 SERIES,TPSMC,SMD0805,25DXXK SERIES,TPSMB,TPSMA6J SERIES,TPSMA,TPSMBJ SERIES,34SXXJ,20DXXKJ,SMD1210,20DXXKJ SERIES,SMDJ SERIES,UN2220,UN2E8-XXXM SERIES,TPSMA6J,UNSDC12V-2L,1.5SMC SERIES,15KPS SERIES,SMAJ-AT,PXXXLA SERIES,UN3E5-XXXLSMD

选型指南 - 优恩半导体 - 2021 PDF 英文下载