The T6070218B4BT from Powerex is a Silicon Controlled Rectifier with Breakover Voltage 200 V, Breakover Current 4500 A, Gate Trigger Voltage 3 V, Gate Trigger Current 0.15 A, Temperature Operating Range -40 to 125 Degree C. Tags: Screw Mount. More details for T6070218B4BT can be seen below.