The RB051LAM-40 from ROHM Semiconductor is a Power Diode with Forward Current 3 A, Forward Voltage 0.35 to 0.45 V, Reverse Current 150 to 1000 uA, Reverse Voltage 20 V, Repetitive Peak Reverse Voltage 40 V. Tags: Surface Mount. More details for RB051LAM-40 can be seen below.