The FF30 from Micross is a Space Qualified Diode with Dynamic Resistance 30 to 120 Degree C/W (Thermal), Forward Current 0.16 to 0.35 A, Forward Voltage 5 V, Reverse Current 0.25 to 10 uA, Reverse Voltage 3000 V. Tags: Axial-Lead. More details for FF30 can be seen below.