The MS T770C03 from MS Power is a Silicon Controlled Rectifier with Breakover Voltage 300 V, Breakover Current 11500 to 12500 A, Gate Trigger Voltage 3.0 V, Gate Trigger Current 200 mA, Temperature Operating Range -40 to 125 Degree C. Tags: Disc. More details for MS T770C03 can be seen below.