The FS0201DN00RB from Fagor Electronica is a Silicon Controlled Rectifier with Breakover Voltage 400 V, Breakover Current 22.5 to 25 A, Gate Trigger Voltage 0.8 V, Gate Trigger Current 1 to 20 uA, Temperature Operating Range -40 to 125 Degree C. Tags: Surface Mount. More details for FS0201DN00RB can be seen below.