Different types of Capacitor

In this article, we are going to explain capacitors and different types of capacitors. A capacitor is an electronic component distinguished by its capacity to store an electric charge. A capacitor is a passive electrical part that can store energy in the electric field between a pair of conductors (it is called “plates”).

Different types of capacitors

In simple words, we can call that a capacitor is a tool used to store and release electricity, generally as the result of a chemical action. Also referred to as a storage cell, a secondary cell, an accumulator, or a condenser. A Leyden Jar was a main example. Pin Detail of capacitor.

Different Types of Capacitors

There are many types of capacitors for different applications and functions. These are the Main and Most Common Types:

Ceramic Capacitors

These are non-polarized capacitors manufactured out of two or more alternating coats of metal and ceramic. The ceramic works as the dielectric and the metal work as the plate/wire. These capacitors are also called “Disc Capacitors.”

A code of 3 Digit is usually written on the frame of this kind of capacitor to tell their capacitance in pico-farads. The first two digits present the value of the capacitor and the third digit represents the number of zeros to be added.

Different Types of Capacitors

Electrolytic Capacitor

This kind of capacitor is usually used where large capacitance is required. The anode of electrolytic capacitors is manufactured of metal and is covered with an oxidized layer used as the dielectric. The other electrode can be either a wet non-solid or solid electrolyte.

Electrolytic capacitors are polarized. This means that correct polarity must be used when supplying DC voltage to it. In simple words, the Negative lead of the capacitor must be connected with the negative terminal, and the positive lead to connect with the positive terminal.

These capacitors are grouped into 3 Types:

  • Aluminum electrolytic capacitors.
  • Tantalum electrolytic capacitors.
  • Niobium electrolytic capacitors.

Film Capacitor

These are the most common kinds of capacitors used in electronics. Film capacitors are non-polarized. Here an insulating plastic film works as the dielectric. Electrodes of these kinds of capacitors can be aluminum or zinc reactive. They are applied on one or both edges of the plastic film, therefore, forming a metalized film capacitor. Sometimes a separate metallic foil is used over the film so forming a film or fo capacitor.

Film capacitors are obtainable in different forms and sizes and offer several benefits over paper-kind capacitors. They are highly reliable, have a long life, and have fewer tolerances. They also work as well in a high-temperature environment.

film capacitors

Variable Capacitor

These are non-polarized variable capacitance kinds of capacitors. They have operating and stable plates to determine the capacitance.  They are usually used in Radios, Transmitters Transistor Receivers, etc.

  • These capacitors are grouped as:

  • Tuning capacitors:
  • Trimmer capacitors:
Variable capacitors