The STPSC40H12C-Y from STMicroelectronics is a Power Diode with Forward Current 20 A, Forward Voltage 1.5 V, Reverse Current 120 µA, Reverse Voltage 1200 V, Repetitive Peak Reverse Voltage 1200 V. Tags: Through Hole. More details for STPSC40H12C-Y can be seen below.