The STPS1L40-Y from STMicroelectronics is a Power Diode with Forward Current 1 A, Forward Voltage 0.37 to 0.50 V, Reverse Current 35 uA, Repetitive Peak Reverse Voltage 40 V, Non-Repetitive Peak Forward Current 50 to 60 A. Tags: Surface Mount. More details for STPS1L40-Y can be seen below.