The UT138FEG-5-TF3-R from Unisonic Technologies is a Triac with Breakover Voltage 500 V, Breakover Current 90 to 100 A, Gate Trigger Voltage 0.25 to 1.5 V, Gate Trigger Current 2.5 to 25 mA, Temperature Operating Range -40 to 125 Degree C. Tags: Through Hole. More details for UT138FEG-5-TF3-R can be seen below.