The 1N5554 from Semtech is a Power Diode with Forward Current 3.0 to 5.0 A, Forward Voltage 1.0 V, Reverse Current 1.0 to 60 uA, Reverse Voltage 1000 V, Repetitive Peak Reverse Voltage 1000 V. Tags: Through Hole. More details for 1N5554 can be seen below.