【经验】常见TVS管电路原理图符号及TVS管直流选型举例

时间： 2022-09-16 来源：优恩半导体官网

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TVS管的电路原理图符号与稳压二极管符号类似，结构也都差不多。了解TVS管的电路原理图符号是掌握TVS管符合选型的基础。

图1

一般常见的TVS管电路原理图符号有：V_BR、I_PP、I_R、V_RWM、V_C、P_M、C_P

V_BR代表的是：击穿电压

I_PP代表的是：反向脉冲峰值电流

I_R代表的是：漏电流

V_RWM代表的是：反向断态电压（截止电压）或反向工作电压

V_C代表的是：箝位电压

P_M代表的是：反向脉冲峰值功率

C_P代表的是：电容

TVS管选型时就应当充分考虑电路条件，学会查看电路原理图符号，遵守箝位电压V_C（MAX）不大于后端电路的允许安全电压；反向工作电压V_RWM不低于电路的工作电压以及额定脉冲功率，必须大于电路中出现的瞬态浪涌功率等原则。这样才能在器件选型上不盲选。

例如直流电选型：

整机直流工作电压12V，允许安全电压25V（峰值），浪涌源的阻抗50MΩ，其干扰波形为方波，TP=1MS，峰值电流50A。

1、可以先从工作电压12V选取max反向工作电压VRWM为13V，则击穿电压V_BR=15.3V；

2、从击穿电压值选取max箝位电压V_C（MAX）=1.30×V_BR=19.89V，取V_C=20V；

3、再从箝位电压V_C和峰值电流I_P计算出方波脉冲功率：P_M=V_C×I_P=20×50=1000W

4、最后计算折合为TP=1mS指数波的峰值功率，折合系数K₁=1.4，PM=1000W÷1.4=715W

从优恩产品手册中可查到1.5KE15A其中P_M=1500W，关断电压V_RWM=12.8V，击穿电压V_RWM=14.3～15.8V，箝位电压V_C=21.2V，浪涌电流I_P=1500/21.2＝70.7A。完全满足上述设计要求，而且留有一倍的余量，不论方波还是指数波都适用。

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本文由三年不鸣转载自优恩半导体官网，原文标题为:常见TVS管电路原理图符号及TVS管直流选型举例，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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SERIES,SA90C,10D241K,SMD0805-010,10SMBJ180A,14D431K,LCDA05C-8,LCDA05C-4,25D,P6KE220CA,SA40CA,ESD05V32D-C,HCM1012GD900B05,10SMBT7.5A,ESD05V88D-CBP,10D821KEC,SMD0805-005,UN2E8-150ML,UN1812-760HS,ESD05V88D-CBD,SMCJ64A-AT,SMBJ48CA-AT,P3800TB,TPSMBJ30A,P3800TA,SMDJ90,UN3220-471HS,P6KE100CA,5KP28C,SMDT7.0A,P6SMB SERIES,5KP28A,14D681KJ,TPSMA100A,P3800SC,P3800SB,SMDJ85,6.0SMAJ54CA,ESD30V12D-C,P3800SA,ESD30V12D-A,SMDJ80,SMAJ8.5CA,SMAJ180C,SMAJ180A,UN2E5-90LSMD,TP5.0SMDJ40A,SMDJ75CA-AT,20D122KJ,10SMBT36A,ESD3.3V04D-LC,SMAJ350CA-AT,14D361KSC,5.0SMDJ220A,SMDJ78,UN30-160,UN16-900,ESD05V08P-LC,SMDJ75,25D121K,5KP8.0C,14D561KJ,SMDJ70,5KP8.0A,UN2K8-450L,1.5SMC10A,UN0805-420H,TPSMA6J26CA,SMDJ16CA,SMCJS SERIES,14D560K,SMBJ130C,SMBJ130A,5.0SMDJ350A,SMDJ64,SMDJ60,34S210J,5KP120CA,ESD12V52D-CF,30KP120A,UNS3220 SERIES,SMDJ43A-AT,SMDJ58,UN30-185,SMDJ54,P6KE75,10SMBJ7.0CA,SMDJ51,UN2E5-3600LL,20KP132A,SMAJ160CA-AT,10SMBT7.0A,UN2K8,P6KE62CA,UN30-135,SMDJ48,P6KE68,SMDJ45,SMDJ43,UNB-401M,SMDJ40,TPSMA36CA,P6KE82,ESD15V02D-CKN,5.0SMDJ78C,SMCJ7.0C,SMDT7.5A,5.0SMDJ78A,SMCJ7.0A,SMDJ51CA,5.0SMDJ48CA,UN111B339HWA1DFL,15KP51A,TPSMDJ,SMDJ36,SMDJ33,25D751KJ,P4SMA220A,SMDJ30,10SMBJ60A,P6KE91,KB-380,SM8Z26A,ESD3.3V12D-A,ESD3.3V12D-C,SMD1812-200-16V,TPSMCJ,UN2H8-5000LL,SMDJ28,5KP8.5C,SMDJ26,5KP8.5A,SMDJ24,UN2K8-600,SMDJ22,SMDJ20,UN1210-151H,SMD0805-110-12V,SMBJ11A-AT,07D331KJ,ESD0402M,UN16 SERIES,14D751KSC,SMD1812-300-16V,SM8Z28A,SMDJ19,ESD12V52D-HA,SMDJ18,SMDJ17,SMDJ16,TPSMB10J16CA,SMDJ15,TPSMBJ,SMDJ14,TPSMB56CA,SMDJ13,SMDJ12,SMDJ11,SMDJ10,SMCJ36A,SMD0805-010-30V,P6KE30,32D621KJ,SMCJ36C,SA190CA,5.0SMDJ75C,5.0SMDJ75A,UNA-SMD,15SMBJ160CA,SMF54CA,TPSMA6J18A,P4SMA91A,P6KE27,TPSMAJ,P6SMB170A,P0300DM,UN1812-390HS,P6KE24,P6KE22,P6KE43,SMCJ45CA,UN3E8-200HSMD,UN0603E,P6KE75CA,P0300EA,P0300EB,P0300EC,P6KE39,TPSMA6J19A,UN2H8,P6KE36,TCF03025U12002A SERIES,P6KE33,10SMBJ64A,SMCJ58CA,P6KE51,TPSMBJ110CA,SMDJ180CA-AT,25D511KJ,SMD1206-300,SMDJ7.5CA,TPSMA75A,UN1812-270HS,5.0SMDJ17A-AT,1.5KE18CA,14D201KJ,UN30-110,BLC03C-4,UN2K8-350L-2,5.0SMDJ70CA,UN2E5,UN2K8-350L-1,SMCJ33A,P6KE47,SMCJ33C,TPSMA6J16A,UN2E8,UN2E8-150HL,P4SMA350A,P6KE62,P4SMA6.8CA,ESD03V23T-LC,ESD03V23T-LA,ESD08V52D-A,15SMBJ180A,14D301K,10SMBT30A,P6KE56,ESD08V52D-C,TPSMA6J17A,5.0SMDJ33CA,UNS3K,UN2E6-SMD SERIES,UN1812-390H,TPSMDJ24CA,20D361K,40D361KJ,4.0SMF13CA,SMDJ160A,SMBJ160CA-AT,TP5.0SMDJ28A,

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