【技术】解析TVS瞬态抑制二极管三大应用特点及注意事项

时间： 2022-11-30 来源：全业电子

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瞬态电压抑制器，简称TVS二级管，是一种二极管形式的高性能保护设备，有的文献上也称为TVP、AJTVS、SAJTVS等。当TVS二极管的两极受到反向瞬态高能量冲击时，它可以以10~12秒的速度将两极之间的高阻抗变成低阻抗，并吸收数千瓦的浪涌功率。将两极之间的电压钳位在预定值，有效地保护电子线路中的精密部件，以免损坏各种浪涌脉冲。TVS二级管具有响应时间快、瞬态功率大、漏电流低、破坏电压偏差小、容易控制钳位电压、无破坏极限、体积小等优点。目前广泛应用于计算机系统、通信设备、交流/DC电源、汽车、家用电器、仪器仪表等领域。

在实际应用电路中，处理瞬时脉冲损坏设备的最佳方法是从敏感设备中引出瞬时电流。为了达到这个目的，TVS在电路板上与受保护的电路并联。这样，当瞬时电压超过电路的正常工作电压时，TNS会破坏雪崩，从而为瞬时电流提供超低阻抗通路。结果，瞬时电流通过TVS被打开，从而避免被保护的设备。在电压恢复正常值之前，保护电路始终保持截止电压。此后，瞬时脉冲结束后，TVS二极管自动恢复到高电阻状态，整个电路进入正常电压状态。那么TVS二极管应用特点是什么？并且需要注意什么？相信很多人都不清楚，本文将为大家一一解答如下。

TVS二极管应用三大特点

（1）在信号和电源线上添加TVS二极管可以防止微处理器或单片机瞬时脉冲，如静电放电效应、交流电源浪涌和开关电源噪声引起的故障；

（2）静电放电效应可以释放10000伏和60A以上的脉冲，并可以持续10毫秒。然而，一般的TTL设备在遇到超过30毫秒的10伏脉冲时会损坏。使用TVS二极管可以有效吸收会损坏设备的脉冲，消除总线间开关造成的干扰；

（3）将TVS二极管放置在信号线和接地之间，可以避免数据和控制总线受到不必要的噪声影响。

TVS二极管使用时注意事项

（1）瞬时变压的吸收功率(峰值)与瞬时变压脉冲宽度之间的关系。手册只给出特定脉宽下的吸收功率(峰值)，而实际线路中的脉冲宽度是不可预测的，应提前估计。应该减少宽脉冲的数量；

（2）保护小电流负载可以有意识地在线路中增加限流电阻。只要限流电阻的电阻值适当，就不会影响线路的正常运行，但限流电阻对干扰产生的电流会大大降低。因此，可以选择峰值功率较小的TVS二极管来保护小电流负载线路；

（3）抑制反复出现的瞬变电压，特别值得注意的是TVS二极管的稳定平均功率是否在安全范围内。

全业电子TVS产品系列详情如下：

规格系列：P6SMB、1.5SMC、5.0SMDJ、8.0SMDJ、SACB、SM8S、P4KE、SA、P6KE、1.5KE、3KP、5KP、8KP、15KP、20KP、30KP、K、SAC、LCE

产品外形规格：以贴片型和引线型为主，根据封装和内部结构，可分为轴向引线二极管、直插TVS(多线保护)、贴片型、组件型和大功率模块型。

产品电压：3.3V~600V

产品特点：反应速度快（ps级）、体积小、脉冲功率大、钳位电压低等，其10/1000μs波脉冲功率为400W~30KW，脉冲峰值电流为0.52A~544A的破坏电压为6.8V~550V的系列值，容易使用各种电压的电路。

产品作用：并联于电路中。当电路正常工作时，它处于截止状态（高电阻状态），不影响电路的正常工作。当电路异常过压并达到其破坏电压时，它很快从高电阻状态变成低电阻状态。在为瞬时电流提供低阻抗导通路径的同时，将异常的高压钳制在安全水平以内，保护被保护的IC和线路的异常过压消失时，恢复到高电阻状态，电路正常工作。

产品应用：TVS二极管广泛应用于半导体和敏感部件的保护，通常用于二次电源和信号电路的保护、防静电等。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、声频输入，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。

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本文由carat转载自全业电子，原文标题为:TVS瞬态抑制二极管三大应用特点及注意事项，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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SMAF6J5.0(C)A-T THRU SMAF6J350A-T Automotive Transient Voltage Suppressors

型号- SMAF6J43CA-T,SMAF6J78CA-T,SMAF6J12A-T,SMAF6J64A-T,SMAF6J17CA-T,SMAF6J170A-T,SMAF6J33CA-T,SMAF6J58A-T,SMAF6J51CA-T,SMAF6J8.0CA-T,SMAF6J350A-T,SMAF6J15A-T,SMAF6J100A-T,SMAF6J26A-T,SMAF6J190A-T,SMAF6J250A-T,SMAF6J120A-T,SMAF6J70A-T,SMAF6J10CA-T,SMAF6J78A-T,SMAF6J14A-T,SMAF6J22CA-T,SMAF6J48CA-T,SMAF6J20A-T,SMAF6J110CA-T,SMAF6J85A-T,SMAF6J43A-T,SMAF6J12CA-T,SMAF6J20CA-T,SMAF6J5.0A-T,SMAF6J90A-T,SMAF6J220A-T,SMAF6J120CA-T,SMAF6J180CA-T,SMAF6J150CA-T,SMAF6J40A-T,SMAF6J160A-T,SMAF6J6.5A-T,SMAF6J48A-T,SMAF6J28A-T,SMAF6J51A-T,SMAF6J200A-T,SMAF6J9.0CA-T,SMAF6J17A-T,SMAF6J14CA-T,SMAF6J16A-T,SMAF6J18CA-T,SMAF6J7.0A-T,SMAF6J180A-T,SMAF6J60CA-T,SMAF6J45A-T,SMAF6J26CA-T,SMAF6J22A-T,SMAF6J60A-T,SMAF6J85CA-T,SMAF6J190CA-T,SMAF6J8.0A-T,SMAF6J54A-T,SMAF6J16CA-T,SMAF6J6.5CA-T,SMAF6J11CA-T,SMAF6J24CA-T,SMAF6J11A-T,SMAF6JXXXCA-T,SMAF6J6.0A-T,SMAF6J9.0A-T,SMAF6J54CA-T,SMAF6J36CA-T,SMAF6J70CA-T,SMAF6J110A-T,SMAF6J170CA-T,SMAF6J7.0CA-T,SMAF6J36A-T,SMAF6J40CA-T,SMAF6J130A-T,SMAF6J6.0CA-T,SMAF6J30CA-T,SMAF6J300A-T,SMAF6J8.5A-T,SMAF6J24A-T,SMAF6J210A-T,SMAF6J13CA-T,SMAF6J160CA-T,SMAF6J8.5CA-T,SMAF6J75A-T,SMAF6J33A-T,SMAF6J10A-T,SMAF6J64CA-T,SMAF6J7.5A-T,SMAF6J90CA-T,SMAF6J18A-T,SMAF6J200CA-T,SMAF6J13A-T,SMAF6J150A-T,SMAF6J7.5CA-T,SMAF6J45CA-T,SMAF6J5.0CA-T,SMAF6J58CA-T,SMAF6J15CA-T,SMAF6J28CA-T,SMAF6J130CA-T,SMAF6J30A-T,SMAF6J100CA-T,SMAF6J75CA-T

2023/6/13 - 普罗森美 - 数据手册代理服务技术支持批量订货

【产品】峰值脉冲功率为5000W（tp=1ms）双向瞬态电压抑制器5KP5.0C系列，适用于汽车电子行业

灿阳科技推出的5KP5.0C系列双向瞬态电压抑制器，具有出色的钳位能力、快速的响应时间和低增量浪涌电阻等特性。其VRM为5.0-180V，PPK 为5000W（tp=1ms）；可应用于对保护器件要求比较高的应用场景，如汽车电子、家电、工业控制、照明、通信和医疗等行业。

2023-02-09 - 产品代理服务技术支持批量订货

【应用】国产单P-MOSFET负载开关TMI6263AH用于通信设备，性价比高，输入电压范围为2.5V~5.5V

客户的通信设备在常规应用环境内考虑低成本方案，信号控制板上接口保护部分原使用模块保护方案，考虑到性价比给其推荐了国产拓尔微的单P-MOSFET负载开关TMI6263AH方案，内部集成集成60mΩ功率MOSFET，可消除开关两端的反向电流。当输出电压高于输入电压时，电源开关将自动关闭。

2023-03-17 - 应用方案代理服务技术支持批量订货

P4KExx(C)A-T Series Automotive Transient Voltage Suppressor

型号- P4KE15CA-T,P4KE600CA-T,P4KEXXCA-T,P4KE8.2A-T,P4KE150A-T,P4KE130CA-T,P4KE120CA-T,P4KE82CA-T,P4KE33CA-T,P4KE16A-T,P4KE130A-T,P4KE480A-T,P4KE39A-T,P4KE68CA-T,P4KE22A-T,P4KE110CA-T,P4KE250A-T,P4KE68A-T,P4KE43A-T,P4KE110A-T,P4KE300CA-T,P4KE11A-T,P4KE540A-T,P4KE440CA-T,P4KE250CA-T,P4KE36A-T,P4KE51A -T,P4KE6.8CA-T,P4KE10CA-T,P4KE400CA-T,P4KE350A-T,P4KE180A-T,P4KE150CA-T,P4KE20CA-T,P4KE12CA-T,P4KE440A-T,P4KE10A -T,P4KE56A-T,P4KE20A-T,P4KE62A-T,P4KE530CA-T,P4KE82A-T,P4KEXXA-T,P4KE27CA-T,P4KE160A-T,P4KE9.1A -T,P4KE200A-T,P4KE8.2CA-T,P4KEXXA-T SERIES,P4KE75CA-T,P4KE400A-T,P4KE350CA-T,P4KE24CA-T,P4KE91CA-T,P4KE300A-T,P4KE12A-T,P4KE180CA-T,P4KE510CA-T,P4KEXXXCA-T,P4KE16CA-T,P4KE200CA-T,P4KE220A-T,P4KE170CA-T,P4KE120A-T,P4KE47CA-T,P4KE550A-T,P4KE6.8A-T,P4KE47A-T,P4KE22CA-T,P4KE18CA-T,P4KE36CA-T,P4KE220CA-T,P4KE15A-T,P4KE91A-T,P4KE530A-T,P4KE7.5CA-T,P4KE100CA-T,P4KE550CA-T,P4KE27A-T,P4KE160CA-T,P4KE11CA-T,P4KE100A-T,P4KE600A-T,P4KE33A-T,P4KE540CA-T,P4KE7.5A-T,P4KE9.1CA-T,P4KE18A-T,P4KE75A-T,P4KE51CA-T,P4KE39CA-T,P4KE24A-T,P4KE480CA-T,P4KE170A-T,P4KE43CA-T,P4KE510A-T,P4KE30CA-T,P4KE56CA-T,P4KE13CA-T,P4KE13A-T,P4KE30A-T,P4KE62CA-T,P4KEXXCA-T SERIES

2023/5/6 - 普罗森美 - 数据手册代理服务技术支持批量订货

SM8S20CA THRU SM8S36CA TRANSIENT VOLTAGE SUPPRESSOR DataSheet

型号- SM8S28CA,SM8S20CA,SM8S33CA,SM8S22CA,SM8S30CA,SM8S36CA,SM8S24CA,SM8S26CA

2022/9/2 - SMC - 数据手册代理服务技术支持批量订货

1.0SMBJ Series 1000W Transient Voltage Suppressor

型号- 1.0SMBJ400CA,1.0SMBJ17CA,1.0SMBJ190CA,1.0SMBJ17A,1.0SMBJ45A,1.0SMBJ110CA,1.0SMBJ13CA,1.0SMBJ33A,1.0SMBJ,1.0SMBJ85A,1.0SMBJ36CA,1.0SMBJ78CA,1.0SMBJ350A,1.0SMBJ160A,1.0SMBJ51CA,1.0SMBJ70CA,1.0SMBJ200CA,1.0SMBJ6.5CA,1.0SMBJ120A,1.0SMBJ28CA,1.0SMBJ160CA,1.0SMBJ7.0A,1.0SMBJ16A,1.0SMBJ28A,1.0SMBJ20CA,1.0SMBJ43CA,1.0SMBJ85CA,1.0SMBJ8.5A,1.0SMBJ24CA,1.0SMBJ20A,1.0SMBJ60A,1.0SMBJ8.0CA,1.0SMBJ18CA,1.0SMBJ7.5A,1.0SMBJ6.0A,1.0SMBJ170CA,1.0SMBJ15A,1.0SMBJ5.0CA,1.0SMBJ10CA,1.0SMBJ33CA,1.0SMBJ75CA,1.0SMBJ43A,1.0SMBJ14CA,1.0SMBJ130A,1.0SMBJ170A,1.0SMBJ90CA,1.0SMBJ220CA,1.0SMBJ7.5CA,1.0SMBJ9.0A,1.0SMBJ14A,1.0SMBJ26A,1.0SMBJ78A,1.0SMBJ54A,1.0SMBJ30A,1.0SMBJ48CA,1.0SMBJ70A,1.0SMBJ250CA,1.0SMBJ40CA,1.0SMBJ200A,1.0SMBJ150CA,1.0SMBJ440CA,1.0SMBJ8.0A,1.0SMBJ9.0CA,1.0SMBJ30CA,1.0SMBJ11CA,1.0SMBJ13A,1.0SMBJ15CA,1.0SMBJ300CA,1.0SMBJ180A,1.0SMBJ100A,1.0SMBJ7.0CA,1.0SMBJ36A,1.0SMBJ48A,1.0SMBJ12A,1.0SMBJ22CA,1.0SMBJ24A,1.0SMBJ64CA,1.0SMBJ120CA,1.0SMBJ45CA,1.0SMBJ26CA,1.0SMBJ64A,1.0SMBJ40A,1.0SMBJ250A,1.0SMBJ SERIES,1.0SMBJ60CA,1.0SMBJ400A,1.0SMBJ210A,1.0SMBJ440A,1.0SMBJ16CA,1.0SMBJ130CA,1.0SMBJ54CA,1.0SMBJ12CA,1.0SMBJ58CA,1.0SMBJ11A,1.0SMBJ75A,1.0SMBJ51A,1.0SMBJ150A,1.0SMBJ190A,1.0SMBJXXCA,1.0SMBJ6.0CA,1.0SMBJ300A,1.0SMBJ110A,1.0SMBJ6.5A,1.0SMBJ18A,1.0SMBJ5.0A,1.0SMBJ180CA,1.0SMBJ350CA,1.0SMBJ58A,1.0SMBJ100CA,1.0SMBJ10A,1.0SMBJ22A,1.0SMBJ90A,1.0SMBJ210CA,1.0SMBJ8.5CA,1.0SMBJ220A

2023/1/9 - 萨瑞微电子 - 数据手册 - Rev.A2 代理服务技术支持批量订货