The DMF2820 from Skyworks is a Space Qualified Diode with Forward Voltage 200 to 260 mV, Reverse Breakdown Voltage 4 V, Temperature operating range -65 to 175 Degree C, Total Capacitance 0.15 to 0.30 pF (Junction Capacitance). Tags: Ceramic, Chip. More details for DMF2820 can be seen below.