The SX008U from SMC Diode Solutions is a Silicon Controlled Rectifier with Breakover Voltage 600 V, Breakover Current 8 A, Gate Trigger Voltage 0.6 to 0.8 V, Gate Trigger Current 20 to 200 uA, Temperature Operating Range -40 to 150 Degree C. Tags: Through Hole. More details for SX008U can be seen below.