A ceramic capacitor with the designation CAP CER 390PF 1.5KV C0G/NP0 1812 is specified for a capacitance of 390 pF ±1 and a working voltage of 1500V (1.5kV). It has a temperature coefficient of C0G or NP0, also known as 1B, and a metric size of 4532 corresponding to the 1812 designation.