The U1D from Vishay is a Power Diode with Forward Current 1.0 A, Forward Voltage 0.71 to 0.92 V, Reverse Current 0.005 to 0.1 mA, Repetitive Peak Reverse Voltage 200 V, Non-Repetitive Peak Forward Current 30 A. Tags: Surface Mount. More details for U1D can be seen below.