The EC103D1 from WeEN Semiconductors is a Silicon Controlled Rectifier with Breakover Voltage 400 V, Breakover Current 8 A, Gate Trigger Voltage 0.2 to 0.8 V, Gate Trigger Current 0.000012 A, Temperature Operating Range -40 to 150 Degree C. Tags: Through Hole. More details for EC103D1 can be seen below.