The TYN20Y-600TF from WeEN Semiconductors is a Silicon Controlled Rectifier with Breakover Voltage 600 V, Breakover Current 225 A, Gate Trigger Voltage 0.25 to 1 V, Gate Trigger Current 0.01 A, Temperature Operating Range -40 to 150 Degree C. Tags: Through Hole. More details for TYN20Y-600TF can be seen below.