The 1N5618 from Micross is a Space Qualified Diode with Forward Current 2 A, Forward Voltage 1.1 to 1.5 V, Reverse Current 0.5 to 25 uA (Leakage), Reverse Voltage 600 V, Repetitive Peak Reverse Voltage 600 V. Tags: Axial-Lead. More details for 1N5618 can be seen below.