... & stud phase control thyristor such as KP Phase Control Thyristors, Fast-Turn-off Thyristor, High Frequency Thyristor, Rotation Thyristors. The ... hermetic glass-metal seal selectable. 2) Disc type phase control thyristor or silicon control rectifier (SCR), 5A ~ 5000A, 100V ... metal case with ceramic insulator. 3) Rotary type phase control thyristor or silicon control rectifier (SCR), 300A ~ 500A, 600V ...