... thyristers or silicon control rectifier (SCR), 5A~500A, 100V~5000V, hermetic metal case with ceramic insulator and hermetic ... control thyristor or silicon control rectifier (SCR), 5A ~ 5000A, 100V ~ 5000V, hermetic metal case with ceramic insulator. 3) Rotary ... type phase control thyristor or silicon control rectifier (SCR), 300A ~ 500A, ...