The JANHCD1N6643 from Sensitron Semiconductors is a Space Qualified Diode with Forward Voltage 0.80 to 1.2 V, Reverse Current 50 nA, Temperature operating range -65 to 175 Degree C, Total Capacitance 2.8 to 4.0 pF. Tags: Die. More details for JANHCD1N6643 can be seen below.