The Capacitor is an electrical device that stores energy in the form of an electric field. It consists of two metal plates separated by a dielectric or non-conducting substance. The capacitor types broadly divided based on fixed capacitance and variable capacitance. The most important is the fixed capacitance capacitors, but capacitors with variable capacitance also exist. These include rotary or trimmer capacitors. Capacitors with fixed capacitance are divided into film capacitors, ceramic capacitors, electrolytic, and superconductor capacitors.

Ceramic capacitors are majorly used in the resonant circuit in transmitter stations. Class 2 high-power capacitors are used in high voltage laser power supplies, power circuit breakers, induction furnaces, etc. Surface mount capacitors are often used in printed circuit boards and high-density applications.