The BTB04G-4-A-T60-K from Unisonic Technologies is a Triac with Breakover Voltage 400 V, Breakover Current 40 to 42 A, Gate Trigger Voltage 1.5 V, Gate Trigger Current 10 to 25 mA, Temperature Operating Range -40 to 110 Degree C. Tags: Through Hole. More details for BTB04G-4-A-T60-K can be seen below.