The DG306AE25 from Dynex Semiconductor is a Gate Turn off Thyristor with Breakover Voltage 2500 V, Breakover Current 600 A, Gate Trigger Voltage 0.9 V, Gate Trigger Current 1 A, Temperature Operating Range -40 to 125 Degree C. Tags: Disc. More details for DG306AE25 can be seen below.