The TDK4403002DH from Powerex is a Silicon Controlled Rectifier with Breakover Voltage 4000 V, Breakover Current 56000 A, Gate Trigger Voltage 4 V, Gate Trigger Current 0.3 A, Temperature Operating Range -40 to 125 Degree C. Tags: Disc. More details for TDK4403002DH can be seen below.