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HAVELLS Capacitor Price List w.e.f 14th February 2014 (VIEW)      HAVELLS Customer Care No:+91-120-4771000

L&T Capacitors Price List w.e.f 1st January 2015 (VIEW)                   L&T Customer Care No:18002094545​

Introduction of Capacitors

A capacitor is a bit like a battery, but it has a different job to do. A battery uses chemicals to store electrical energy and release it very slowly through a circuit; sometimes (in the case of a quartz watch) it can take several years. A capacitor generally releases its energy much more rapidly—often in seconds or less. If you're taking a flash photograph, for example, you need your camera to produce a huge burst of light in a fraction of a second. A capacitor attached to the flash gun charges up for a few seconds using energy from your camera's batteries. (It takes time to charge a capacitor and that's why you typically have to wait a little while.) Once the capacitor is fully charged, it can release all that energy in an instant through the xenon flash bulb. Zap!

Capacitors come in all shapes and sizes, but they usually have the same basic components. There are the two conductors (known as plates, largely for historic reasons) and there's the insulator in between them (called the dielectric). The two plates inside a capacitor are wired to two electrical connections on the outside called terminals, which are like thin metal legs you can hook into an electric circuit.

Working of Capacitors

Though any non-conducting substance can be used as a dielectric, practically some special materials like porcelain, mylar, teflon, mica, cellulose and so on. A capacitor is defined by the type of dielecric selected. It also defines the application of the capacitor.

According to the size and type of dielectric used, the capacitor can be used for high-voltage as well as low-voltage applications.
For applications in radio tuning circuits air is commonly used as the dielectric. for applications in timer circuits mylar is used as the dielectric. For high voltage applications glass is normally used. For application in X-ray and MRI machines, ceramic is mostly preferred.
The metal plates are separated by a distance “d”, and a dielectric material is placed in-between the plates.
The dielectric constant of the dielectric material =  e0e………………e0 is the dielectric of air.

The dielectric material is the main substance that helps in storing the electrical energy.

Advantages of Capacior

  • Since the capacitor can discharge in a fraction of a second, it has a very large advantage. Capacitors are used for appliances which require high speed use like in camera flash and laser techniques.
  • Capacitors are used to remove ripples by removing the peaks and filling in the valleys.
  • A capacitor allows ac voltage to pass through and blocks dc voltage. This has been used in many electronic applications.

Conversion of Farads into Kvar

These are the main Formulas to Convert Capacitor kVAR into Farads and Vice Versa

Required Capacity of Capacitor in Farads/Microfarads (Convert Capacitor Farads into kVAR)

C = kVAR / (2 π f V2) in microfarad

Required Capacity of Capacitor in kVAR (Convert Capacitor kVAR into Farads)

kVAR = C x (2 π f V2)  


Our Major Brands of Capacitors are

Havells Capacitor , L&T Capacitor