SKKH273/14E “一触即发”。但是，如果阳极或控制极外加的是反向电压，晶闸管就不能导通。
控制极的作用是通过外加正向触发脉冲使晶闸管导通，
却不能使它关断。那么，用什么方法才能使导通的晶闸管关断呢?使导通的晶闸管关断，
可以断开阳极电源(图3中的开关S)或使阳极电流小于维持导通的最小值(称为维持电流)。
如果晶闸管阳极和阴极之间外加的是交流电压或脉动直流电压，那么，在电压过零时，
晶闸管会自行关断。
编辑本段怎样测试晶闸管的好坏
西门康可控硅
SKKH20/16E
SKKH26/12E
SKKH26/16E
SKKH27/12E
SKKH27/16E
SKKH41/12E
SKKH41/16E
SKKH42/12E
SKKH42/16E
SKKH56/12E
SKKH56/16E
SKKH57/12E
SKKH57/16E
SKKH71/12E
SKKH71/16E
SKKH72/12E
SKKH72/16E
SKKH91/12E
SKKH91/16E
SKKH92/12E
SKKH92/16E
SKKH105/12E
SKKH105/16E
SKKH106/12E
SKKH106/16E
SKKH122/12E
SKKH122/16E
SKKH131/12E
SKKH131/16E
SKKH132/12E
SKKH132/16E.
SKKH161/12E
SKKH161/16E
SKKH162/12E
SKKH162/16E.
SKKH172/12E
SKKH172/16E
SKKH210/12E
SKKH210/16E
SKKH213/12E
SKKH213/16E
SKKH250/12E
SKKH250/14E
SKKH250/16E
SKKH253/12E
SKKH253/14E
SKKH253/16E
SKKH273/12E
SKKH273/14E
SKKH273/16E.
SKKH280/12E
SKKH280/16E.
英飞凌IGBT
BSM200GA120DLC
BSM200GA120DLCS
BSM300GA120DLC
BSM300GA120DLCS
BSM400GA120DLC
BSM400GA120DLCS
BSM600GA120DLC
BSM600GA120DLCS
BSM200GA120DN2
BSM200GA120DN2C
BSM200GA120DN2S
BSM300GA120DN2
BSM300GA120DN2S
BSM400GA120DN2
BSM400GA120DN2S
FZ300R12KE3B1G
FZ300R12KE3G
FZ400R12KE3
FZ400R12KE3_B1
FZ600R12KE3
FZ600R12KE3_B1
FZ800R12KE3
FZ1200R12KE3
FZ1600R12KE3
FZ2400R12KE3
FZ2400R12KE3_B9
FZ3600R12KE3
FZ400R12KS4
FZ600R12KS4
FZ800R12KS4_B2
FZ800R12KF4
FZ1050R12KF4
FZ1200R12KF4
FZ1600R12KF4
FZ1800R12KF4
FZ2400R12KF4
FZ800R12KL4C
FZ1200R12KL4C
FZ1600R12KL4C
FZ1800R12KL4C
FZ2400R12KL4C
FZ3600R12HP4
FZ2400R12HP4_B9
BSM25GB120DN2
BSM35GB120DN2
BSM50GB120DN2
BSM75GB120DN2
BSM100GB120DN2
BSM100GB120DN2K
BSM150GB120DN2
BSM200GB120DN2
BSM300GB120DN2
BSM50GB120DLC
BSM75GB120DLC
BSM100GB120DLC
BSM100GB120DLCK
BSM150GB120DLC