A radial ceramic capacitor with the designator CAP CER 390PF 6KV COG/np0 rad features a capacitance of 390 picofarads and has a tolerance of ±5 percent. It is rated for use at voltages of up to 6000 volts (6kV) and is classified as a C0G or NP0 type, which is known for its stability in temperature.