The RF305BM6S from ROHM Semiconductor is a Power Diode with Forward Current 3 A, Forward Voltage 1.3 to 1.7 V, Reverse Current 0.04 to 10 uA, Reverse Voltage 600 V, Repetitive Peak Reverse Voltage 600 V. Tags: Surface Mount. More details for RF305BM6S can be seen below.