The RFN20TJ6S from ROHM Semiconductor is a Power Diode with Forward Current 20 A, Forward Voltage 1.0 to 1.55 V, Reverse Current 0.1 to 200 uA, Reverse Voltage 600 V, Repetitive Peak Reverse Voltage 600 V. Tags: Through Hole. More details for RFN20TJ6S can be seen below.