The ID301HR from Digitron Semiconductors is a Silicon Controlled Rectifier with Breakover Voltage 400 V, Breakover Current 15 A, Gate Trigger Voltage 0.2 to 1.0 V, Gate Trigger Current 200 to 500 µA, Temperature Operating Range -40 to 110 Degree C. Tags: Through Hole. More details for ID301HR can be seen below.