The RBS3LAM40A from ROHM Semiconductor is a Power Diode with Forward Current 3 A, Forward Voltage 0.43 to 0.49 V, Reverse Current 230 to 500 uA, Reverse Voltage 20 V, Repetitive Peak Reverse Voltage 40 V. Tags: Surface Mount. More details for RBS3LAM40A can be seen below.