The DMJ2312 from Skyworks is a Space Qualified Diode with Forward Voltage 500 to 600 mV, Reverse Breakdown Voltage 4 V, Temperature operating range -65 to 175 Degree C, Total Capacitance 0.05 to 0.15 pF (Junction Capacitance). Tags: Ceramic, Chip. More details for DMJ2312 can be seen below.