【技术】TVS瞬态抑制二极管特点及选用技巧

时间： 2022-09-26 来源：里阳半导体官网

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瞬态电压抑制器(Transient Voltage Suppressor)简称TVS，是一种二极管形式的高效能保护器件。当TVS二极管的两极受到反向瞬态高能量冲击时，它能以10-12秒量级的速度，将其两极间的高阻抗变为低阻抗，吸收高达数千瓦的浪涌功率，使两极间的电压箝位于一个预定值，有效地保护电子线路中的精密元器件，免受各种浪涌脉冲的损坏。由于它具有响应时间快、瞬态功率大、漏电流低、击穿电压偏差小、箝位电压较易控制、无损坏极限、体积小等优点。

目前已广泛应用于计算机系统、通讯设备、交/直流电源、汽车、电子镇流器、家用电器、仪器仪表(电度表)、RS232/422/423/485、I/O、LAN、ISDN、ADSL、USB、MP3、PDAS、GPS、CDMA、GSM、数字照相机的保护、共模/差模保护、RF耦合/IC驱动接收保护、电机电磁波干扰抑制、声频/视频输入、传感器/变速器、工控回路、继电器、接触器噪音的抑制等各个领域。

一、TVS瞬态抑制二极管三大特点：

1、将TVS二极管加在信号及电源线上，能防止微处理器或单片机因瞬间的肪冲，如静电放电效应、交流电源之浪涌及开关电源的噪音所导致的失灵。

2、静电放电效应能释放超过10000V、60A以上的脉冲，并能持续10ms;而一般的TTL器件，遇到超过30ms的10V脉冲时，便会导至损坏。利用TVS二极管，可有效吸收会造成器件损坏的脉冲，并能消除由总线之间开关所引起的干扰(Crosstalk)。

3、将TVS二极管放置在信号线及接地间，能避免数据及控制总线受到不必要的噪音影响。

二、TVS的选用技巧

1、确定被保护电路的最大直流或连续工作电压、电路的额定标准电压和“高端”容限。

2、TVS额定反向关断VWM应大于或等于被保护电路的最大工作电压。若选用的VWM太低，器件可能进入雪崩或因反向漏电流太大影响电路的正常工作。串行连接分电压，并行连接分电流。

3、TVS的最大箝位电压VC应小于被保护电路的损坏电压。

4、在规定的脉冲持续时间内，TVS的最大峰值脉冲功耗PM必须大于被保护电路内可能出现的峰值脉冲功率。在确定了最大箝位电压后，其峰值脉冲电流应大于瞬态浪涌电流。

5、对于数据接口电路的保护，还必须注意选取具有合适电容C的TVS器件。

6、根据用途选用TVS的极性及封装结构。交流电路选用双极性TVS较为合理;多线保护选用TVS阵列更为有利。

7、温度考虑。瞬态电压抑制器可以在-55~+150℃之间工作。如果需要TVS在一个变化的温度工作，由于其反向漏电流ID是随增加而增大;功耗随TVS结温增加而下降，从+25℃到+175℃，大约线性下降50%雨击穿电压VBR随温度的增加按一定的系数增加。因此，必须查阅有关产品资料，考虑温度变化对其特性的影响。

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本文由玉鹤甘茗转载自里阳半导体官网，原文标题为:TVS瞬态抑制二极管特点及选用技巧，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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2019/3/27 - 选型指南代理服务技术支持采购服务

SMAJ系列TVS二极管

该资料介绍了SMAJ系列瞬态电压抑制二极管（TVS Diode），这是一种专为保护敏感电子设备免受雷击和其他瞬态电压事件影响而设计的器件。它具有低剖面设计、内置应力缓解设计和良好的钳位能力等特点，适用于电信、计算机、工业和消费电子产品中的I/O接口、VCC总线以及其他易损电路的保护。

里阳半导体 - TVS DIODES,TVS元件,TVS二极管,TVS COMPONENTS,SMAJ200A,SMAJ6.0CA,SMAJ40CA,SMAJ200CA,SMAJ14CA,SMAJ6.0A,SMAJ10CA,SMAJ33CA,SMAJ28A,SMAJ16A,SMAJ7.5A,SMAJ18CA,SMAJ20A,SMAJ350A,SMAJ70CA,SMAJ120A,SMAJ60A,SMAJ110CA,SMAJ,SMAJ51CA,SMAJ160A,SMAJ9.0A,SMAJ190CA,SMAJ48CA,SMAJ250CA,SMAJ17A,SMAJ500A,SMAJ7.5CA,SMAJ45A,SMAJ33A,SMAJ250A,SMAJ60CA,SMAJ440A,SMAJ350CA,SMAJ210A,SMAJ64CA,SMAJ400A,SMAJ480A,SMAJ8.0A,SMAJ15CA,SMAJ220CA,SMAJ11CA,SMAJ160CA,SMAJ500CA,SMAJ26A,SMAJ14A,SMAJ78A,SMAJ54A,SMAJ130A,SMAJ30A,SMAJ90CA,SMAJ550CA,SMAJ8.0CA,SMAJ70A,SMAJ300CA,SMAJ75CA,SMAJ510A,SMAJ170A,SMAJ550A,SMAJ440CA,SMAJ26CA,SMAJ45CA,SMAJ22CA,SMAJ130CA,SMAJ15A,SMAJ43A,SMAJ75A,SMAJ51A,SMAJ220A,SMAJ100CA,SMAJXXCA,SMAJ16CA,SMAJ5.0CA,SMAJ12CA,SMAJ180CA,SMAJ600A,SMAJ54CA,SMAJ48A,SMAJ36A,SMAJ24A,SMAJ58CA,SMAJ12A,SMAJ64A,SMAJ40A,SMAJ100A,SMAJ30CA,SMAJ8.5CA,SMAJ180A,SMAJ210CA,SMAJ SERIES,SMAJ150CA,SMAJ5.0A,SMAJ13A,SMAJ6.5A,SMAJ85A,SMAJ600CA,SMAJ85CA,SMAJ20CA,SMAJ6.5CA,SMAJ17CA,SMAJ36CA,SMAJ13CA,SMAJ18A,SMAJ120CA,SMAJ58A,SMAJ78CA,SMAJ22A,SMAJ10A,SMAJ110A,SMAJ300A,SMAJ90A,SMAJ510CA,SMAJ9.0CA,SMAJ190A,SMAJ150A,SMAJ28CA,SMAJ7.0A,SMAJ24CA,SMAJ7.0CA,SMAJ400CA,SMAJ43CA,SMAJ170CA,SMAJ480CA,SMAJ8.5A,SMAJ11A,COMPUTER,电脑,电信,敏感电子设备,工业应用,SENSITIVE ELECTRONIC EQUIPMENT,TELECOM,INDUSTRIAL APPLICATIONS,CONSUMER ELECTRONIC APPLICATIONS,消费电子应用

2022/4/1 - 数据手册 - V3 代理服务技术支持采购服务

SM8S系列表面贴装-600W TVS二极管规格书

SM8S系列TVS二极管专为保护敏感电子设备免受雷击和其他瞬态电压事件引起的电压瞬变而设计。该系列二极管具有高可靠性、优异的钳位能力、低增量浪涌电阻、符合ISO7637-2 5a/5b和ISO16750负载浪涌测试标准，适用于汽车级AEC-Q101应用。

里阳半导体 - TVS DIODES,TVS二极管,SM8S18CA,SM8S SERIES,SM8S33C,SM8S33CA,SM8S43C,SM8S33A,SM8S30CA,SM8S43A,SM8S36CA,SM8S58CA,SM8S,SM8SXXCA,SM8S18A,SM8S28CA,SM8S18C,SM8S28A,SM8S20CA,SM8S43CA,SM8S22A,SM8S30A,SM8S24C,SM8S22CA,SM8S20A,SM8S22C,SM8S24CA,SM8S48C,SM8S26A,SM8S48CA,SM8S28C,SM8S36C,SM8S58C,SM8S48A,SM8S26CA,SM8S24A,SM8S36A,SM8S58A,SM8S26C,SM8SXXXX,SM8S40C,SM8S40CA,SM8S20C,SM8S40A,SM8S30C,电信,敏感电子设备,SENSITIVE ELECTRONIC EQUIPMENT,INDUSTRIAL APPLICATIONS,I/O接口,I/O INTERFACES,消费电子应用,TELECOM,电脑,CONSUMER ELECTRONIC APPLICATIONS,工业应用,COMPUTER,VCC BUS,VULNERABLE CIRCUITS,VCC总线,易受攻击的电路

2024/8/19 - 数据手册 - Version: V7 代理服务技术支持采购服务

【经验】TVS的工作原理及电性参数分析

TVS的工作原理TVS(Transient Voltage Suppressors)，即瞬态电压抑制器，又称雪崩击穿二极管，它是采用标准的半导体工艺制成的具有单个 PN 结或多个 PN 结集成的器件。TVS是上个世纪六十年代由美国学者Richard Von Barandy所发明，极性分单向和双向，是电路保护器件中应用最为广泛的一种元件。

2023-04-26 - 设计经验代理服务技术支持采购服务

【选型】安邦（ANBON）TVS瞬态电压抑制器选型指南

TVS瞬态电压抑制器工作原理&特点 TVS瞬态电压抑制器电性参数&注意事项 TVS瞬态电压抑制器产品线

安邦 - TVS,瞬态电压抑制器,雪崩击穿二极管,P4KE6.8CA,SMBJ5.0A,P4SMA440A,P6SMB,SMBJ,SMAJ6.0CA,SM6S40A,SMDJ440A,5.0SMDJ11A,SMCJ440CA,SM6S,1.5SMC440CA,SMCJ440A,SMAJ5.0CA,SMAJ6.0A,30KP,5.0SMDJ150A,SMF170A,S4MF5.0A,P4KE,15KP26A,SMF5.0CA,SMB10J,15KP,P6KE440A,S4MF170CA,1.5KE440CA,SMAJ,SM8S10A,SMDJ5.0CA,SMBJ440CA,SMF SERIES,3.0SMC6.8CA,3KP250A,P6SMB440A,1.5KE6.8CA,30KP26A,SMAJ5.0A,1.5KE440A,P6KE6.8CA,S4MF,SMDJ5.0A,5KP6.8A,3KP250CA,5KP250CA,SMB10J5.0CA,SMBJ440A,3KP6.8A,5.0SMDJ11CA,SM6S10A,P4SMA,SMAJ440A,1.5SMC6.8CA,SMDJ,P6KE440CA,SMCJ5.0CA,1.5KE6.8A,5KP250A,P4KE440A,S4MF170A,1.5SMC,P6KE6.8A,P6SMB6.8CA,5KP SERIES,P4SMA440CA,P4SMA6.8A,SM8S,SMB10J5.0A,P4KE440CA,1.5KE,S4MF5.0CA,5KP6.8CA,5.0SMDJ,SMB10J440A,SMDJ440CA,P6SMB6.8A,3KP SERIES,P6KE,3KP6.8CA,SMCJ,SMB10J440CA,SMCJ5.0A,SMF5.0A,P4SMA6.8CA,SMAJ440CA,3.0SMC,P6SMB440CA,SM8S40A,5.0SMDJ150CA,P4KE6.8A,SMF170CA,SMBJ5.0CA,汽车,家电,通讯,仪表仪器,工控,物联网

选型指南代理服务技术支持采购服务

SMF-Q系列表面贴装–200W TVS二极管规格书

SMF-Q系列TVS二极管专为保护敏感电子设备免受雷击和其他瞬态电压事件的影响而设计。该系列具有小型化封装、高可靠性、低感应、出色的钳位能力等特点，适用于汽车、工业标准等应用。

里阳半导体 - TVS DIODES,TVS二极管,SMF43A,SMF18CA,SMF6.0A,SMF15A,SMF7.5A,SMF10CA,SMF14CA,SMF33CA,SMF75CA,SMF170A,SMF5.0CA,SMF160CA,SMF90CA,SMF100CA,SMF-Q SERIES,SMF70A,SMF130A,SMF30A,SMF54A,SMF78A,SMF6.5CA,SMF14A,SMF26A,SMF8.5CA,SMF26CA,SMF22CA,SMF45CA,SMF64CA,SMF60CA,SMF9.0CA,SMF150CA,SMF-Q,SMF13A,SMF8.0A,SMF11CA,SMF15CA,SMF30CA,SMF180A,SMF120CA,SMF40A,SMF100A,SMF64A,SMF5.0A,SMF12A,SMF24A,SMF36A,SMF6.5A,SMF48A,SMFXXXCA-Q,SMF7.0CA,SMF170CA,SMF51A,SMF75A,SMF11A,SMF12CA,SMF58CA,SMF16CA,SMF54CA,SMF150A,SMF90A,SMF7.5CA,SMF110A,SMF10A,SMF7.0A,SMF22A,SMF28CA,SMF58A,SMF8.5A,SMF24CA,SMF18A,SMF20CA,SMF43CA,SMF85CA,SMF110CA,SMFXXX-Q,SMF85A,SMF33A,SMF45A,SMF17CA,SMF17A,SMF36CA,SMF78CA,SMF13CA,SMF160A,SMF180CA,SMF51CA,SMF70CA,SMF60A,SMF120A,SMF20A,SMF6.0CA,SMF9.0A,SMF16A,SMF28A,SMF8.0CA,SMF48CA,SMF40CA,SMF130CA,VULNERABLE CIRCUIT,手机,敏感电子设备,消费者应用程序,CELLULAR PHONES,SENSITIVE ELECTRONIC EQUIPMENT,POWER SUPPLIES,CONSUMER APPLICATIONS,I/O接口,易损电路,BUSINESS MACHINES,电源,商业机器,VCC BUS,便携式电子设备,I/O INTERFACES,VCC总线,PORTABLE ELECTRONICS

2024/8/21 - 数据手册 - Version: V2 代理服务技术支持采购服务