The SJ4025L1ATP from Littelfuse is a Silicon Controlled Rectifier with Breakover Voltage 400 V, Breakover Current 25 A, Gate Trigger Voltage 1.6 V, Gate Trigger Current 0.006 A, Temperature Operating Range -40 to 150 Degree C. Tags: Through Hole. More details for SJ4025L1ATP can be seen below.