The RB510SM-40FH from ROHM Semiconductor is a Power Diode with Forward Current 0.1 A, Forward Voltage 0.48 V, Reverse Current 0.4 to 2.0 uA, Reverse Voltage 40 V, Repetitive Peak Reverse Voltage 40 V. Tags: Surface Mount. More details for RB510SM-40FH can be seen below.