The T9G0221003DH from Powerex is a Silicon Controlled Rectifier with Breakover Voltage 2200 V, Breakover Current 17000 A, Gate Trigger Voltage 3 V, Gate Trigger Current 0.2 A, Temperature Operating Range -40 to 125 Degree C. Tags: Disc. More details for T9G0221003DH can be seen below.