The T4771N22TOF PR from Infineon Technologies is a Silicon Controlled Rectifier with Breakover Voltage 2200 V, Breakover Current 91000 A, Gate Trigger Voltage 1.8 V, Gate Trigger Current 4340 A, Temperature Operating Range -40 to 125 Degree C. Tags: Chassis Mount. More details for T4771N22TOF PR can be seen below.