The RFN20NS3S from ROHM Semiconductor is a Power Diode with Forward Current 20 A, Forward Voltage 1.1 to 1.35 V, Reverse Current 0.05 to 10 uA, Reverse Voltage 350 V, Repetitive Peak Reverse Voltage 350 V. Tags: Surface Mount. More details for RFN20NS3S can be seen below.