【经验】防雷型压敏电阻的特点和注意事项

时间： 2022-12-06 来源：优恩半导体官网

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雷击浪涌防护型的MOV(压敏电阻)，我们称为防雷型压敏电阻，它是一种限压型的元件。

在日常生活中，有很多电子产品都会受到雷击浪涌的损害，最常见就是电视机、插座之类，小时候经常因雷雨天气未拔掉插头，而导致电视机受到损害，不知道大家是否也有这样的经历呢？为预防这种雷电对电子产品造成危害，人们通常都会在其电路中放置防雷器件产品，例如：压敏电阻。

MOV-压敏电阻主要是以ZnO为原料，添加多种微量金属氧化物，经陶瓷工艺制成的一款器件产品，外面包封是环氧树脂。大家都知道，压敏电阻不止防雷型压敏电阻这一块，那么，雷击浪涌防护型的MOV(压敏电阻)，究竟有什么不一样？让它在市场上如何热销?

其实，平常的MOV压敏电阻与雷击浪涌防护型MOV压敏电阻最大的一个差别，就是其字面意思，一个是防雷作用，一个是起过压保护作用，因此他们之间不止是名称有所不同，更大的一个特性是通流量的不同，两者的通流量相差十倍以上。防雷型压敏电阻在工作时，其内部的每一个压敏单元都会承受来自瞬态浪涌的能量。因此它的浪涌吸收能力更强。

这里需要注意的是：

1.MOV通流容量：在预定的时间间隔次数施加在压敏上的规定波形电路后，其电压仍然在规定范围内。

2.实际过程中，MOV压敏电阻吸收的浪涌电流不大于其峰值脉冲电流。

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本文由玉鹤甘茗转载自优恩半导体官网，原文标题为:优恩-防雷型的MOV压敏电阻器件你了解过吗？，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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产品发布时间 : 2024-10-28

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

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优恩半导体TVS瞬态电压抑制二极管选型表

优恩半导体提供以下技术参数的TVS选型：反向截止电压：3.3V~440V；击穿电压（min）：5.2V~492V；击穿电压（max）：6V~543V；测试电流：1mA、5mA、10mA；最大钳位电压 VC @IPP (V)：8V~713V；最大峰值脉冲电流IPP (A)：0.56A~3000A；最大反向漏电流IR @VRWM (μA)：1uA~1000μA；关断电压：10V~85V；最大反向浪涌电流IPP(A)：48A~388A；最大IR @VRWMTJ=175(uA)：150uA、250uA。

产品型号	品类	Reverse Stand-Off Voltage VRWM(V)	Breakdown Voltage VBR (V) @IT MIN	Breakdown Voltage VBR (V) @IT MAX	Test Current IT (mA)	Maximum Clamping Voltage VC @IPP (V)	Maximum Peak Pulse Current IPP (A)	Maximum Reverse Leakage IR @VRWM (μA)	model
8KP24A	Axial Lead Transient Voltage Suppressors	24	26.7	29.5	1	38.9	206	5	Uni