“瞬(shun)態(tai)抑制二極(ji)(ji)管(guan)耐壓(ya)(ya)值，怎(zen)么看(kan)？”這是(shi)四(si)川成(cheng)都客戶(hu)向東沃電子咨(zi)詢的(de)(de)一(yi)(yi)個問題。話(hua)說(shuo)回來了(le)，這個問題也是(shi)咨(zi)詢率比較高的(de)(de)一(yi)(yi)個問題。在實際應用中，電子工程師選型，常常喜歡把瞬(shun)態(tai)抑制二極(ji)(ji)管(guan)鉗(qian)位電壓(ya)(ya)說(shuo)成(cheng)耐壓(ya)(ya)值。為此(ci)，這個問題，客戶(hu)實際問的(de)(de)是(shi)瞬(shun)態(tai)抑制二極(ji)(ji)管(guan)鉗(qian)位電壓(ya)(ya)應該(gai)怎(zen)么看(kan)？

瞬(shun)態抑制TVS二(er)極管選(xuan)型過程中，會涉(she)及(ji)到工(gong)作(zuo)電(dian)(dian)(dian)壓(ya)、擊(ji)穿電(dian)(dian)(dian)壓(ya)、鉗(qian)位(wei)(wei)電(dian)(dian)(dian)壓(ya)、峰(feng)值脈(mo)沖(chong)(chong)電(dian)(dian)(dian)流、峰(feng)值脈(mo)沖(chong)(chong)功(gong)率、漏電(dian)(dian)(dian)流、封(feng)裝這(zhe)些參數。鉗(qian)位(wei)(wei)電(dian)(dian)(dian)壓(ya)指的是施加規定波(bo)形(xing)的峰(feng)值脈(mo)沖(chong)(chong)電(dian)(dian)(dian)流IPP時(shi)，TVS兩端(duan)測得的峰(feng)值電(dian)(dian)(dian)壓(ya)。在選(xuan)型應用中，TVS二(er)極管的鉗(qian)位(wei)(wei)電(dian)(dian)(dian)壓(ya)要小于后級被保(bao)護電(dian)(dian)(dian)路中的損壞電(dian)(dian)(dian)壓(ya)。那么，當(dang)知道這(zhe)個瞬(shun)態抑制二(er)極管型號時(shi)，怎么查看(kan)其耐壓(ya)值（鉗(qian)位(wei)(wei)電(dian)(dian)(dian)壓(ya)）呢？

舉個例子，品(pin)(pin)牌東沃TVS二極管SMDJ440A，查看產品(pin)(pin)手冊可知，SMDJ440A單向(xiang)TVS，SMDJ系列，具體參數如下：

細心觀(guan)察會發現，SMDJ440A的(de)鉗位電(dian)壓(ya)(ya)(ya)大(da)于其(qi)擊穿(chuan)電(dian)壓(ya)(ya)(ya)大(da)于其(qi)工(gong)(gong)作(zuo)電(dian)壓(ya)(ya)(ya)。工(gong)(gong)作(zuo)電(dian)壓(ya)(ya)(ya)不用查看規(gui)格(ge)書，單單根據(ju)型號就(jiu)能看出(chu)來，其(qi)中數字(zi)440就(jiu)是工(gong)(gong)作(zuo)電(dian)壓(ya)(ya)(ya)440V，而其(qi)他參數就(jiu)要查看對應的(de)產品手冊才能確認！關于“瞬態抑制TVS二(er)極(ji)管(guan)耐壓(ya)(ya)(ya)值，怎么看？”這個話題就(jiu)分享到(dao)這兒了(le)，想了(le)解更(geng)多電(dian)路保護(hu)器件選型、型號、參數、價格(ge)、現貨等方面信息的(de)伙伴們，可直接咨詢東沃電(dian)子產品工(gong)(gong)程(cheng)師：136 7581 6901（微信同號）朱(zhu)工(gong)(gong)