The RB178VYM-40FHTR from ROHM Semiconductor is a Power Diode with Forward Current 1 A, Forward Voltage 0.79 V, Reverse Current 0.3 µA, Reverse Voltage 40 V, Repetitive Peak Reverse Voltage 40 V. Tags: Surface Mount. More details for RB178VYM-40FHTR can be seen below.