The RBS3LAM40C from ROHM Semiconductor is a Power Diode with Forward Current 3 A, Forward Voltage 0.36 to 0.40 V, Reverse Current 400 to 800 uA, Reverse Voltage 20 V, Repetitive Peak Reverse Voltage 40 V. Tags: Surface Mount. More details for RBS3LAM40C can be seen below.