The CAP CER 390PF 250V C0G/NP0 1808 is a specific type of ceramic capacitor. It has a capacitance value of 390 pF and operates at a voltage rating of ±1 250V. This component falls under the category of C0G, also known as NP0 (Negative Positive Zero), which is a designation for certain types of ceramic capacitors with specific temperature characteristics. The 1808 designation refers to its metric size, which corresponds to the dimensions of an 1812 package in the imperial system.