The RFN3LB4STBR1 from ROHM Semiconductor is a Power Diode with Forward Current 3 A, Forward Voltage 1 to 1.3 V, Reverse Current 1 µA, Reverse Voltage 400 V, Repetitive Peak Reverse Voltage 400 V. Tags: Surface Mount. More details for RFN3LB4STBR1 can be seen below.