Capacitors

Capacitors are passive electrical components found in almost all electronics applications. Our range includes over 60,000 different capacitors including aluminium, tantalum, polymer, polyester film and ceramic capacitors. We source from globally renowned manufacturers AVX, Murata, KEMET, Panasonic, TDK and many more, so that you can rely on performance.

What is a capacitor and what does it do?

A capacitor is a device used to store energy as an electric charge, similar to a battery but they are able to release the charge much faster. The amount it's able to store is known as capacitance, this is measured in Farads (F). They comprise 2 metal plates (conductors) separated by an electrical insulator (dielectric).

What capacitor types are available?

There are many different types available with detailed specifications for their required function. The main elements are available in varying materials and these determine many properties of the capacitor. Some factors to consider are:

  • Metal plate material - e.g silver, tantalum, aluminium
  • Dielectric plate material - paper, film, ceramic, glass
  • Max voltage - cannot be exceeded or the device will break
  • Size - capacitance and dimensions
  • Tolerance - variance on the capacitance value
  • Mounting type - how it is fixed to the circuit
  • ESR (Equivalent series resistance) - resistance of the terminals

Applications of capacitors

Capacitors are found all around us, they are used in most electronics from fans to hybrid electric cars - there are over 500 just in a typical smartphone. Here are some of their uses:

  • Decoupling capacitors - can control high-frequency noise, removing voltage ripples from the power supply.
  • Energy storage and supply - deliver stored energy bursts quickly, like a camera flash for example.
  • Signal filtering - they are able to block low-frequency signals and allow higher-frequencies to pass through. Useful in telecommunications.
Related Products
General Purpose GRM series, High Dielectric Constant type. ...
Description:
General Purpose GRM series, High Dielectric Constant type. Smaller size and higher capacitance valueHigh reliability and no polarityExcellent pulse responsibility and noise reduction due to the low impedance at high frequencyThe GRM series is lead free productApplications in general electronic ...
Professional range of TDK multilayer ceramic chip capacitors ...
Description:
Professional range of TDK multilayer ceramic chip capacitors from the C series. Suitable for high frequency and high density type power supplies due to low ESR and excellent frequency characteristics. High capacitance through precision technologies that enable the use of ...
Nickel barrier terminations covered with a layer of ...
Description:
Nickel barrier terminations covered with a layer of plated Tin (NiSn). Applications include mobile phones, video and tuner designs, COG/NPO is the most popular formulation of the "temperature compensating", EIA Class I ceramic materials, X7R, X5R formulations are called "temperature ...
GRM High Dielectric Constant Type is ideal for ...
Description:
GRM High Dielectric Constant Type is ideal for decoupling and smoothing Circuits, and for Rated voltages of 200 V min. They are best for clamp snubber circuits and smoothing circuits. Large capacity in small size multilayer structureHigh reliability with no ...