The STPS40L45C-Y from STMicroelectronics is a Power Diode with Forward Current 20 to 40 A, Forward Voltage 0.42 to 0.70 V, Reverse Current 0.6 uA, Repetitive Peak Reverse Voltage 45 V, Non-Repetitive Peak Forward Current 230 A. Tags: Through Hole. More details for STPS40L45C-Y can be seen below.