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. Need to switch between capacitance units for your circuit design? Easily and instantly convert capacitance values between farads, microfarads, nanofarads and picofarads with our Capacitance Conversion calculator.

Take a look at our voltage divider calculator to work out the output voltage of a resistor divider circuit for a given set of resistor values and source voltage in seconds.

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).

Looking to calculate the cutoff frequency for low-pass and high-pass filters? Our handy calculator will give you the answer you’re looking for in a matter of seconds.

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.

51211 Products showing for Capacitors

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  • RS Stock No. 194-3511
  • Mfr. Part No. B32529C8102K000
Subtotal (1 pack of 50 units)
£8.45(exc. VAT)
£0.169/unit
In Stock
  • RS Stock No. 199-2010
  • Mfr. Part No. CC1206KKX7R9BB224
Subtotal (1 tape of 50 units)
£3.10(exc. VAT)
£3.10/tape
In Stock
  • RS Stock No. 198-8287
  • Mfr. Part No. CS1206JKNPOCBN100
Subtotal (1 tape of 50 units)
£3.20(exc. VAT)
£0.064/unit
In Stock
  • RS Stock No. 198-8188
  • Mfr. Part No. CS0603KRX7R0BB104
Subtotal (1 tape of 100 units)
£5.60(exc. VAT)
£0.056/unit
Currently unavailable
  • RS Stock No. 198-5295P
  • Mfr. Part No. AC0603JRNPO9BN150
Subtotal 200 units (supplied on a reel)
£3.20(exc. VAT)
£0.016/unit
In Stock
  • RS Stock No. 199-2026
  • Mfr. Part No. CC1206KKX7RBBB332
Subtotal (1 tape of 50 units)
£2.70(exc. VAT)
£2.70/tape
Currently unavailable
  • RS Stock No. 194-3764
  • Mfr. Part No. B32654A3335J000
Subtotal (1 pack of 5 units)
£16.10(exc. VAT)
£3.22/unit
In Stock
  • RS Stock No. 131-1215
  • Mfr. Part No. 615R100GAD33
Subtotal (1 unit)
£5.81(exc. VAT)
£5.81/unit
Currently unavailable
  • RS Stock No. 198-5347P
  • Mfr. Part No. AC0612JRNPO9BN220
Subtotal 50 units (supplied on a continuous strip)
£5.90(exc. VAT)
£0.118/unit
In Stock
  • RS Stock No. 196-8768
  • Mfr. Part No. C44UOGT6900M51K
Subtotal (1 bag of 4 units)
£390.40(exc. VAT)
£97.60/unit
Currently unavailable
  • RS Stock No. 199-2062
  • Mfr. Part No. CC1206KKX7RZBB223
Subtotal (1 tape of 25 units)
£2.93(exc. VAT)
£2.93/tape
In Stock
  • RS Stock No. 194-3595
  • Mfr. Part No. B32652A4224J000
Subtotal (1 pack of 20 units)
£6.40(exc. VAT)
£0.32/unit
Temporarily out of stock
  • RS Stock No. 198-8279
  • Mfr. Part No. CS0805KRX7RYBB222
Subtotal (1 reel of 4000 units)
£200.00(exc. VAT)
£0.05/unit
In Stock
  • RS Stock No. 194-3654
  • Mfr. Part No. B32652A6154J000
Subtotal (1 pack of 20 units)
£8.24(exc. VAT)
£0.412/unit
Currently unavailable
  • RS Stock No. 195-4864P
  • Mfr. Part No. CAS17C102KARGC
Subtotal 5 units (supplied on a continuous strip)
£4.80(exc. VAT)
£0.96/unit
In Stock
  • RS Stock No. 199-1944P
  • Mfr. Part No. CC1206JKNPOCBN560
Subtotal 50 units (supplied on a continuous strip)
£5.35(exc. VAT)
£0.107/unit
Temporarily out of stock
  • RS Stock No. 199-1977
  • Mfr. Part No. CC1206KKX5R6BB226
Subtotal (1 reel of 2000 units)
£144.00(exc. VAT)
£144.00/reel
In Stock
  • RS Stock No. 126-2236
  • Mfr. Part No. R463I347040M1M
Subtotal (1 pack of 10 units)
£3.50(exc. VAT)
£0.35/unit
Temporarily out of stock
  • RS Stock No. 210-4880
  • Mfr. Part No. 4TPS220MUD
Subtotal (1 tape of 5 units)
£7.65(exc. VAT)
£1.53/unit
In Stock
  • RS Stock No. 485-761P
  • Mfr. Part No. 885012106003
Subtotal 5 units (supplied on a continuous strip)
£0.66(exc. VAT)
£0.132/unit
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