The G40KAD from Greegoo Electric is a Silicon Controlled Rectifier with Breakover Voltage 1200 to 1400 V, Breakover Current 6000 A, Gate Trigger Voltage 0.8 to 3.0 V, Gate Trigger Current 30 to 250 mA, Temperature Operating Range -40 to 115 Degree C. Tags: Disc. More details for G40KAD can be seen below.