The SCT1255Z from SMC Diode Solutions is a standard-recovery silicon-controlled rectifier (SCR) rated 1.2 kV and 55 A, in an insulated through-hole TO-3P package.
The SCT1255SJ from SMC Diode Solutions is a standard recovery silicon-controlled rectifier (SCR) rated 1.2 kV and 55 A, in a through-hole TO-247J package.