The MS T356S17MK from MS Power is a Silicon Controlled Rectifier with Breakover Voltage 1700 V, Breakover Current 8000 to 9000 A, Gate Trigger Voltage 3.0 V, Gate Trigger Current 200 mA, Temperature Operating Range -40 to 125 Degree C. Tags: Stud Mount. More details for MS T356S17MK can be seen below.