The T500088004AQ from Powerex is a Silicon Controlled Rectifier with Breakover Voltage 800 V, Breakover Current 1200 to 1800 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 T500088004AQ can be seen below.