The RF201L4SDD from ROHM Semiconductor is a Power Diode with Forward Current 1.5 A, Forward Voltage 0.95 to 1.2 V, Reverse Current 0.01 to 1 uA, Reverse Voltage 400 V, Repetitive Peak Reverse Voltage 400 V. Tags: Surface Mount. More details for RF201L4SDD can be seen below.