The 1N5551 from Semtech is a Space Qualified Diode with Forward Current 3.0 to 5.0 A, Forward Voltage 1.0 V, Reverse Current 1.0 to 60 uA, Reverse Voltage 400 V, Repetitive Peak Reverse Voltage 400 V. Tags: Through Hole. More details for 1N5551 can be seen below.