What are Capacitors?

Capacitors are two-terminal circuit elements that store electrical energy as an electric field. It is basically obtained by placing an insulating material between two conductive plates. It is denoted by the letter C in the circuit and equations and its unit is Farad (F).

What Does a Capacitor Do?

Capacitors do not conduct direct current (DC), but have the ability to conduct alternating current (AC).  With these features, they are used for different purposes in most circuits. They are used in filtering in power supply circuits, in generating the desired frequency in resonant circuits, and in voltage regulation and control of power flow in power transmission lines.

How Do Capacitors Work?


When voltage is applied to the capacitor, the conductive plates are charged with an opposite and equal electric charge relative to each other. This causes an electric field to be created between the plates.

There is no charge flow (electric current) between these two plates due to the insulator.

The charge change can only take place through the circuit where the capacitor is connected via both ends.

Where is a Capacitor Used?

Capacitors are used in electrical charge storages, reactive power controls, AC-DC conversion, filtering operations and information loss prevention.

It is an indispensable component in electronic and integrated circuits. In summary, we can say that capacitors are present in all electronic devices

VEKMAR supplies Epcos Capacitors from stock. Reach out to us today and allow our engineering team to share their technical expertise on your projects.


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