A ceramic capacitor with the designation CAP CER 390PF 2KV X7R 1206 has a capacitance value of 390 picofarads (pF), tolerance of ±10%, and a maximum operating voltage rating of 2000 volts (2kV). It is classified as an X7R type, indicating a temperature-dependent dielectric with a relatively stable capacitance over a wide temperature range. The component's metric designation is 3216.