Includes the following:

Stud type phase control thyristors or silicone control rectifier (SCR), 5 to 500A, 100 to 5,000V, hermetic metal case with ceramic insulator and hermetic glass-metal seal selectable Disc type phase control thyristor or silicone control rectifier (SCR), 5 to 5,000A, 100 to 5,000V, hermetic metal case with ceramic insulator Rotary type phase control thyristor or silicone control rectifier (SCR), 300 to 500A, 600 to 2,000V