“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，
SKKT106/12E
SKKT106/14E
SKKT106/16E
SKKT106/18E
SKKT122/08E
SKKT122/12E
SKKT122/14E
SKKT122/16E
SKKT122/18E
SKKT131/12E
SKKT131/16E
SKKT132/08E
SKKT132/12E
SKKT132/14E
SKKT132/16E
SKKT132/18E
SKKT161/12E
SKKT161/16E
SKKT162/08E
SKKT162/12E.
SKKT162/14E
SKKT162/16E
SKKT162/18E
SKKT172/08E
SKKT172/12E.
SKKT172/14E
SKKT172/16E
SKKT172/18E
三菱IPM
PM30RSF060
PM75RSD060
PM30RMC060
PM75RSE060
PM30RHC060
PM100RLA060
PM50RHB060
PM150RLA060
PM50RSK060
PM100RSA060
PM75RSK060
PM100RVA060
PM50VHA060
PM100RRS060
PM50RSA060
PM100RSD060
PM50RLB060
PM100RSE060
PM50RSD060
PM300RSD060
PM150RSA060
PM150RVA060
PM50RSE060
PM150RSD060
PM50RHA060
PM150RSE060
PM75RLB060
PM200RSD060
PM75VHA060
PM200RSE060
PM75RSA060
PM75RVA060
PM75RRA060
PM300RSE060
PM75RHA060
PM150RRA060
PM75RLA060
PM200RRA060