The FPFF50 from Micross is a Space Qualified Diode with Forward Current 0.18 to 0.36 A, Forward Voltage 12.5 V, Reverse Current 1 to 25 uA, Reverse Voltage 5000 V, Repetitive Peak Reverse Voltage 5000 V. Tags: Axial-Lead. More details for FPFF50 can be seen below.