The S2800AHR from Digitron Semiconductors is a Silicon Controlled Rectifier with Breakover Voltage 100 V, Breakover Current 100 A, Gate Trigger Voltage 0.9 to 1.5 V, Gate Trigger Current 8 to 15 mA, Temperature Operating Range -40 to 100 Degree C. Tags: Through Hole. More details for S2800AHR can be seen below.