The RB161MM-20 from ROHM Semiconductor is a Power Diode with Forward Current 1 A, Forward Voltage 0.28 to 0.35 V, Reverse Current 280 to 700 uA, Reverse Voltage 20 V, Repetitive Peak Reverse Voltage 25 V. Tags: Surface Mount. More details for RB161MM-20 can be seen below.