The 1N5818 from Vishay is a Power Diode with Forward Current 1.0 A, Forward Voltage 0.450 to 0.900 V, Reverse Current 1.0 to 10 mA, Repetitive Peak Reverse Voltage 30 V, Non-Repetitive Peak Forward Current 25 A. Tags: Through Hole. More details for 1N5818 can be seen below.