The JANHCD1N6638 from Sensitron Semiconductors is a Space Qualified Diode with Forward Voltage 0.65 to 1.1 V, Reverse Current 35 nA, Temperature operating range -65 to 175 Degree C, Total Capacitance 2.5 to 5.0 pF. Tags: Die. More details for JANHCD1N6638 can be seen below.