1、雙向二極管測(cè)量及參數(shù)骨子I督子醫(yī)備注(V)80典型值呀30Vy(V)29.S異艷值為30V(V)乩50.44F1產(chǎn)尸So)V4VE.)雙向觸發(fā)二極管亦稱二端交流器件(DIAC),與雙向晶閘管同時(shí)問世。由于它結(jié)構(gòu)簡(jiǎn)單、價(jià)格低廉，所以常用來觸發(fā)雙向晶閘管，構(gòu)成過壓保護(hù)電路、定時(shí)器等。雙向晶閘管的結(jié)構(gòu)、符號(hào)及等效電路如圖1所示。它屬于三層構(gòu)造、具有對(duì)稱性的二端半導(dǎo)體器件，可等效于基極開路、發(fā)射極與集電極對(duì)稱的NPN晶體管。正、反向伏安特性完全對(duì)稱，見圖2。當(dāng)器件兩端的電壓V小于正向轉(zhuǎn)折電壓V(B0)時(shí)，呈高阻態(tài)；當(dāng)VV(BO)時(shí)進(jìn)入負(fù)阻區(qū)。同樣，當(dāng)V超過反向轉(zhuǎn)折電壓V(BR)時(shí)，管子也能進(jìn)入負(fù)阻區(qū)。

2、轉(zhuǎn)折電壓的對(duì)稱性用/V(B)表示，/V(B)=V(BO)-V(BR)，一般要求/V(B)MinMaxMa:t60Hz50HzMaMinDB3231001f24101.0201G.7士25.0DO-41DB43545100I101.02016.7+!5.0DO-41DBG3&701001101.02016.7ji-55.0DC-41DBS72ee100士E4101.01G.7士E10DO-41DBIO90100teo101.525士丘10DO-15DB12108132100t96101.5zo25士樂10DO-15DB1+126垢斗100111E101.52025士515DO-15DB1C14-

3、4176100118101.52025士弓15DO-35DB181621汨100114101.520Z5士B15DO猗DB20180220100100101.52025815DC-35DEEZ193zq-z,10011TD10l.SZQZ38ZCiDO-25DEE4-Z161001192101.3ZQZ5BZdDO-23DEEt.Z3斗ass-100120810ZQZ58西DO-23D5JQ2703S0100124010T.53J25820DC-ISTypeItrw十/bo一-Ubo性wlVoIBOtrIbCaseStyleMinMaxAVVVVVuAuStjADBS2.02S吾iJ35.05.01001.5A-405DB斗2.035(4?35.05.010CI11.5甲朋A-W5D日巧.0口h7035.05.0,110A-4-05jlCNOTE)：些二極管也可咲提復(fù)DU-41.R-1塑斛封垃Th旦空：呂i亡日已蘭呂卜色3103vailstil&inpIasticcaseDLl-41andR_1