【经验】硕凯电子国产压敏电阻的防老化措施

2019-03-20 硕凯电子
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压敏电阻器是目前应用范围最广泛的电子元件之一,在应用的过程中,压敏电阻老化的问题是其最大的缺点,将会严重干扰系统的正常安全工作。那么,有没有什么方法能够有效的遏制压敏电阻器的老化问题呢?硕凯电子将本文将会介绍两种方法,能够帮助工程师有效解决压敏电阻的老化情况。


要为大家介绍的第一个方法,是将压敏电阻器与陶瓷放电管并联,这样做可以解决通过持续大电流后压敏电阻性能退化的问题,延缓其老化的速度。通过与陶瓷放电管的并联操作,在放电管尚未导通之前,压敏电阻就开始动作,对暂态过电压进行钳位,泄放大电流,当放电管放电导通后它将与压敏电阻进行并联分流,减小了对压敏电阻的通流压力,从而缩短了压敏电阻通大电流的时间,有助于减缓压敏电阻的性能退化。


在这种并联组合的操作过程中,有一点需要工程师注意的问题,那就是如果压敏电阻的参考电压Uima选得过低,那么放电管将有可能在暂态过电压作用期间内不会放电导通,过电压的能量全由压敏电阻来泄放,这对压敏电阻是不利的,因此Uima的数值必须选得比放电管的直流放电电压要大些才行。必须指出,这种井联组合电路并没有解决放电管可能产生的续流问题,因此,它不宜应用于交流电源系统的保护。


第二种能够保护压敏电阻器并延迟其老化的措施,是将压敏电阻与陶瓷放电管串联,串联后的电路图如下图所示:


在正常的运行状态下,压敏电阻在电路系统的工作中常常具有较大的寄生电容,当它应用于交流电源系统的保护时,会在正常运行状态下产生数值可观的泄漏电流。例如一个寄生电容为2nF的压敏电阻安装在220V、50hz的交流电源系统中,其泄漏电流可达0.14mA,这样大的泄漏电流往往会对系统的正常运行产生影响。而当我们将压敏电阻与陶瓷气体放电管串联之后,由于放电管的寄生电容很小,可使整个串联支路的总电容减到几个微法。在这种串联组合支路中,放电管起着一个开关作用。当没有暂态过电压作用时,它能够将压敏电阻与系统隔开,使压敏电阻中几乎无泄漏电流,这就能降低压敏电阻的参考电压Uima而不必顾及由此会引起泄漏电流的增大,从而能较为有效地减缓压敏电阻性能的衰退。

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本文由宝丁转载自硕凯电子,原文标题为:压敏电阻的防老化措施,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  -  硕凯电子  - Ver Jul.2018  - 2018年7月 PDF 中文 下载

基于硕凯压敏电阻14D561K的IGBT快速开关电路,在浪涌抗干扰度试验中通过4级,且试验电压提高10%

本试验选用压敏电阻14D561K:击穿电压:504V-616V;通流量IPP高达4500A;位电压最大值 925V(50A);工作温度:-55 至+125°C;具有通流量大、残压低、响应时间快等特点。当干扰电压达到一定值时,就会把两端的电压钳位住,从而保护IGBT不被击穿

应用方案    发布时间 : 2024-10-25

硕凯电子(Socay)MOV压敏电阻选型指南

目录- Radial Lead Metal Oxide Varistor   

型号- 14D181K,40D271K,25D301K,10D681KJ,10D221KJ,07D121KJ,14D821K,20D470K,20D361K,14D182KJ,10D112KJ,40D911K,14D180K,07D220K,32D361K,05D621K,53D122K,07D680K,14D820K,25D751K,10D560KJ,14D301KJ,10D331KJ,20D181KJ,07D241KJ,07D241K,32D241K,32D471K,40D152K,05D511K,07D471K,20D201KJ,10D220KJ,34S621K,05D470KJ,20D431KJ,20D121K,14D390KJ,53D112K,05D361KJ,07D680KJ,14D181KJ,07D471KJ,07D121K,14D182K,53D221K,53D681K,20D471K,20D241K,10D561KJ,20D182KJ,32D122K,10D330KJ,05D820K,07D221KJ,34S821K,14D270KJ,25D511K,05D241KJ,10D511K,40D182K,05D471KJ,05D180K,34S182K,20D151K,14D391KJ,20D781KJ,07D681KJ,07D361K,20D911K,05D121KJ,07D470K,10D621K,07D330KJ,07D561KJ,20D271K,10D121KJ,14D511KJ,32D221K,32D112K,07D220KJ,14D621KJ,53D361K,32D681K,10D680KJ,14D271KJ,10D241KJ,10D751K,32D331K,10D911KJ,53D241K,14D781KJ,32D561K,25D621K,40D391K,53D471K,07D560KJ,05D680KJ,32D102K,20D331KJ,10D470KJ,40D122K,20D431K,10D820KJ,20D681KJ,20D201K,10D301K,20D221KJ,20D781K,25D681K,10D361KJ,05D201K,25D122K,05D431K,34S301K,07D151KJ,07D301K,20D561KJ,53D301K,05D390KJ,20D330KJ,40D112K,40D221K,40D681K,25D561K,25D331K,34S201K,34S431K,40D,07D431K,10D821KJ,10D471KJ,07D201K,20D220KJ,14D471K,05D511KJ,20D911KJ,20D151KJ,14D241K,40D331K,40D561K,32D391K,25D221K,53D,25D112K,05D621KJ,05D270KJ,14D911KJ,53D751K,14D151KJ,14D470K,20D560KJ,07D271KJ,14D361K,05D391KJ,07D470KJ,32D271K,14D270K,14D391K,05D751K,53D331K,53D561K,20D112K,20D220K,20D680K,14D470KJ,53D102K,05D151KJ,32D911K,14D390K,25D102K,07D781K,40D361K,05D271KJ,34S511K,10D431K,07D361KJ,10D201K,10D781K,20D122K,07D820KJ,20D241KJ,20D471KJ,07D330K,05D301K,07D681K,07D560K,20D680KJ,32D,20D,40D241K,40D471K,32D152K,53D781K,20D102K,07D221K,05D820KJ,10D331K,10D330K,10D560K,10D681K,10D101K,14D471KJ,20D331K,20D561K,53D431K,53D201K,10D151KJ,14D271K,14D361KJ,07D561K,25D431K,25D201K,20D101K,07D101K,07D331K,34S751K,10D561K,10D102K,14D911K,20D221K,20D560K,20D681K,20D330K,07D821KJ,25D781K,14D151K,20D470KJ,10D,05D121K,20D621K,34S122K,05D201KJ,20D361KJ,05D431KJ,34S,20D820KJ,14D102K,32D511K,40D301K,25D271K,10D511KJ,14D121KJ,14D821KJ,05D241K,20D511K,14D241KJ,05D471K,10D271KJ,10D220K,10D221K,05D180KJ,10D112K,10D680K,14D101K,14D331K,14D561K,32D621K,25D391K,07D181KJ,07D301KJ,20D821KJ,34S241K,34S471K,05D361K,07D621K,10D241K,05D470K,10D471K,14D680KJ,14D431K,14D201K,25D,25D152K,40D751K,14D820KJ,07D751KJ,10D270KJ,10D121K,20D121KJ,10D621KJ,10D391KJ,25D911K,14D781K,25D361K,14D,40D102K,14D330KJ,05D301KJ,14D560KJ,34S102K,05D101K,05D561K,05D331K,07D511KJ,07D391KJ,14D221KJ,14D681KJ,14D122K,14D112KJ,10D751KJ,40D781K,05D221K,05D330K,05D560K,05D681K,34S781K,20D301K,07D511K,10D361K,10D390KJ,10D470K,20D122KJ,53D511K,07D270KJ,14D121K,10D182KJ,14D331KJ,40D201K,40D431K,14D561KJ,34S112K,34S681K,05D220K,07D390KJ,34S221K,05D680K,14D220KJ,53D621K,14D112K,14D221K,14D560K,14D681K,10D301KJ,07D621KJ,14D122KJ,05D,14D330K,25D471K,25D241K,20D751K,07D751K,34S561K,20D271KJ,34S331K,32D821K,05D181KJ,14D680K,10D181KJ,14D220K,14D102KJ,53D391K,10D911K,07D271K,07D781KJ,10D271K,05D391K,05D270K,05D390K,20D112KJ,34S271K,05D220KJ,07D,20D511KJ,07D151K,34S911K,53D271K,32D781K,10D151K,20D270KJ,05D681KJ,20D621KJ,53D911K,20D101KJ,20D182K,32D201K,32D431K,10D180KJ,14D751K,20D391KJ,05D560KJ,05D751KJ,14D101KJ,07D390K,10D201KJ,14D431KJ,20D391K,14D621K,20D270K,05D221KJ,07D101KJ,10D390K,05D561KJ,05D330KJ,53D152K,07D270K,07D391K,10D270K,07D331KJ,05D181K,20D390K,34S391K,14D511K,20D102KJ,10D391K,40D821K,20D390KJ,10D781KJ,10D182K,07D180KJ,07D821K,53D821K,14D180KJ,32D301K,25D182K,40D511K,53D182K,05D331KJ,34S361K,10D102KJ,40D621K,20D821K,07D180K,10D180K,10D820K,05D151K,34S152K,10D431KJ,14D201KJ,20D181K,25D821K,32D751K,14D751KJ,07D431KJ,20D301KJ,07D201KJ,20D751KJ,20D820K,07D181K,05D101KJ,10D181K,10D821K,07D820K,05D271K,10D101KJ,14D301K,20D180K,20D180KJ

选型指南  -  硕凯电子  - 2019/3/14 PDF 英文 下载

【应用】国产压敏电阻14D561K用于LED路灯,通流量可达6KA

由于LED灯具有节能、响应时间短、使用寿命长、可直接替换传统灯等优点,所以LED灯的应用越来越广泛,现如今LED路灯也是随处可见。本篇主要讲述硕凯电子14D561K压敏电阻在LED路灯的应用,具有大通流量雷电在电源线路上产生感应浪涌,这个浪涌的能量会在电线上产生一个突波,即浪涌波,浪涌就是通过这样的感应方式进行传输的。

应用方案    发布时间 : 2019-05-22

硕凯电子SC0402ML-SC0603ML Series多层片式压敏电阻器选型表

硕凯电子多层片式压敏电阻器/Multilayer Chip Varistor选型,工作电压最大有效值4V-20V,工作电压最大直流电压值5.5V-26V,额定电压8V-31V,过电压最大允许电压19V-51V,电容85pF-270pF,最大峰值电流20A或30A,瞬态能量峰值0.05J或0.1J。

产品型号
品类
Working Voltage Vrms Volts (Max.)
Working Voltage VDc Volts (Max.)
Varistor Voltage Vv Volts
Varistor Voltage △Vv %
Clamping Vottage Vc Volts (Max.)
Capacitance Cp pF(Typical)
Peak Current Imax Amps (Max.)
Transient Energy Wmax Joules (Max.)
SC0402ML080M
Multilayer Chip Varistor
4
5.5
8
±20
19
270
20
0.05

选型表  -  硕凯电子 立即选型

20D Series Radial Lead Metal Oxide Varistor (MOV)

型号- 5D SERIES,14D,20DXXXKJ,20D470KJ,10D,20D431K,20D681KJ,20D112K,20D201K,20D621K,20D221KJ,20D361KJ,20D151K,20D470K,20D820KJ,20D112KJ,20D220K,20D680K,20D361K,7D SERIES,20D781K,20D781KJ,20D SERIES,20D152KJ,20D511KJ,20D911K,20D301K,20D511K,20D270KJ,5D,20D271K,20D621KJ,20D162K,20D101KJ,20D182K,20D122KJ,20D122K,20D561KJ,20D391KJ,20D162KJ,20D330KJ,20D181KJ,20D241KJ,20D471KJ,20D821K,20D680KJ,20D,20D201KJ,20D102K,20D821KJ,20D220KJ,20D431KJ,20D391K,20D181K,20D270K,20D121K,20D331K,20D561K,20D301KJ,20D911KJ,20D151KJ,20DXXXXX,20D820K,20D751KJ,14D SERIES,20D751K,20D101K,20D271KJ,7D,20D121KJ,20D390K,10D SERIES,20D102KJ,20D560K,20D221K,20D471K,20D681K,20D152K,20D330K,20D241K,20D182KJ,20D390KJ,20D560KJ,20D331KJ,20D180K,20D180KJ

数据手册  -  硕凯电子  - Revision July 20, 2021  - July 20, 2021 PDF 英文 下载 查看更多版本

测试报告  -  硕凯电子  - 2023 年 02 月 17 日 PDF 中文 下载

【应用】国产压敏电阻10D471K助力电源适配器防护,通流量达3.5KA,775V钳位电压

为了保障电源适配器的线路系统能够长时间高效安全工作,工程师就要在线路上做防护措施。压敏电阻在防护线路上是一种很常用的器件,它具有瞬态电压抑制功能,能防止静电放电、瞬态浪涌及其它突波干扰对线路造成的损坏。本文主要介绍硕凯10D471K压敏电阻应用于电源适配器,其具有大通流量,精准钳位特点。

应用方案    发布时间 : 2019-05-25

硕凯电子(Socay)MLV贴片压敏电阻选型指南

目录- Multilayer Chip Varistor   

型号- SC0805ML180K,SC2220ML,SC0805ML390K,SC0603ML,SC0805ML120M,ESD0402E002M05,SC0805ML330K,SC0402ML120M,SC0402ML180K,SC0603ML150L,SC2220ML330K,SC2220ML390K,ESD0603E002M24,SC0402E,SC1210ML240K,SC1210ML470K,SC1210ML680K,SC0805ML050M,SC1210ML390K,SC1812ML270K,SC0402E010M18,SC1206ML,SC1206ML470K,ESD0402E002M12,SC1206ML680K,SC0805ML240K,SC1206ML240K,SC2220,SC0402ML220K,SC1206ML050M,SC2220ML240K,SC1812,SC0603ML080M,SC0805,ESD0603E002M12,SC1210,SC1210ML330K,SC1210ML560K,SC0603E,SC0603E100N05,SC1210ML180K,SC0805ML150M,SC1206ML390K,SC1206ML330K,SC1812ML330K,SC1206ML120M,SC1210ML101K,SC1206ML180K,SC1812ML560K,SC0402E100N05,SC0402ML150L,SC1812ML390K,ESD0603E002M05,SC0603ML180K,SC0402E050M09,SC1210ML,SC0603E010M18,ESD0603E,SC0402E050M05,SC0603ML310K,SC1206,SC0603ML120M,SC0805ML080M,SC1210ML270K,SC1206ML270K,SC0402ML080M,SC0805ML270K,SC1812ML240K,SC1206ML080M,SC0402ML,SC0805ML,SC0603E050M05,ESD0402E,SC0603E050M09,SC1812ML620K,SC2220ML270K,SC0603ML220K,SC1812ML,SC1206ML101K

选型指南  -  硕凯电子  - 2019/3/14 PDF 英文 下载

测试报告  -  硕凯电子  - 2023 年 02 月 17 日 PDF 中文 下载

14D Series Radial Lead Metal Oxide Varistor (MOV)

型号- 14D181K,14D,14D102KJ,5D SERIES,14D270K,14D391K,14D330KJ,10D,14D560KJ,14D270KJ,14D221KJ,14D821K,14D180KJ,14D470KJ,14D681KJ,7D SERIES,14D391KJ,14D122K,14D182KJ,20D SERIES,14D102K,14D162K,14D121KJ,14DXXXXX,14D112KJ,14D180K,14D390K,14D821KJ,14D241KJ,5D,14D820K,14D101K,14D331K,14D561K,14D511KJ,14D751K,14D121K,14D301KJ,14DXXXKJ,14D101KJ,14D331KJ,14D621KJ,14D561KJ,20D,14D271KJ,14D431KJ,14D201KJ,14D220KJ,14D471KJ,14D621K,14D680KJ,14D751KJ,14D390KJ,14D221K,14D112K,14D560K,14D431K,14D681K,14D162KJ,14D201K,14D471K,14D181KJ,14D241K,14D122KJ,14D330K,14D271K,14D361KJ,14D182K,14D SERIES,14D781KJ,14D820KJ,7D,14D511K,10D SERIES,14D911K,14D911KJ,14D151KJ,14D781K,14D680K,14D470K,14D301K,14D151K,14D361K,14D220K

数据手册  -  硕凯电子  - Revision March 25 2022  - March 25 2022 PDF 英文 下载 查看更多版本

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EMC雷击浪涌测试

测试1.2/50us-8/20us组合波,10/700us-5/320us组合波,8/20us单波。能够模拟雷电瞬变引起的浪涌冲击抗干扰测试,最高电压达20KV,电流达20KA。点击预约,支持到场/视频直播测试,资深专家全程指导。

实验室地址: 深圳/上海 提交需求>

通用与车载ESD静电测试

测试等级:空气放电30KV±5%;接触放电30KV±5%,适用标准:GB/T 17626.2、IEC61000-4-2、ISO10605、GB/T 19951;给用户产品出电路保护设计方案建议及整改。点击预约,支持到场/视频直播测试,资深专家全程指导。

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