The RFUH20NS4SFH from ROHM Semiconductor is a Power Diode with Forward Current 20 A, Forward Voltage 1.5 to 1.7 V, Reverse Current 0.05 to 10 uA, Reverse Voltage 430 V, Repetitive Peak Reverse Voltage 430 V. Tags: Surface Mount. More details for RFUH20NS4SFH can be seen below.