The RBQ20BM45AFH from ROHM Semiconductor is a Power Diode with Forward Current 20 A, Forward Voltage 0.51 to 0.59 V, Reverse Current 20 to 200 uA, Reverse Voltage 45 V, Repetitive Peak Reverse Voltage 45 V. Tags: Surface Mount. More details for RBQ20BM45AFH can be seen below.