The RBS3LAM40B from ROHM Semiconductor is a Power Diode with Forward Current 3 A, Forward Voltage 0.40 to 0.45 V, Reverse Current 300 to 600 uA, Reverse Voltage 20 V, Repetitive Peak Reverse Voltage 40 V. Tags: Surface Mount. More details for RBS3LAM40B can be seen below.