The STPS0540-Y from STMicroelectronics is a Power Diode with Forward Current 0.5 A, Forward Voltage 0.35 to 0.55 V, Reverse Current 40 uA, Repetitive Peak Reverse Voltage 40 V, Non-Repetitive Peak Forward Current 5.5 A. Tags: Through Hole. More details for STPS0540-Y can be seen below.