The T6400DHR from Digitron Semiconductors is a Triac with Breakover Voltage 400 V, Breakover Current 300 A, Gate Trigger Voltage 0.2 to 3.4 V, Gate Trigger Current 15 to 240 mA, Temperature Operating Range -65 to 100 Degree C. Tags: Stud Mount. More details for T6400DHR can be seen below.