The BTA04-400S from Comset Semiconductors is a Triac with Breakover Voltage 400 V, Breakover Current 40 to 42 A, Gate Trigger Voltage 1.5 V, Gate Trigger Current 10 mA, Temperature Operating Range -40 to 110 Degree C. Tags: Through Hole. More details for BTA04-400S can be seen below.