The MAC218-4AHR from Digitron Semiconductors is a Triac with Breakover Voltage 200 V, Breakover Current 100 A, Gate Trigger Voltage 0.2 to 2.5 V, Gate Trigger Current 50 to 75 mA, Temperature Operating Range -40 to 125 Degree C. Tags: Through Hole. More details for MAC218-4AHR can be seen below.