The RB531VM-30 from ROHM Semiconductor is a Power Diode with Forward Current 0.1 A, Forward Voltage 0.35 to 0.49 V, Reverse Current 10 to 45 uA, Reverse Voltage 30 V, Repetitive Peak Reverse Voltage 30 V. Tags: Surface Mount. More details for RB531VM-30 can be seen below.