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. 185-1775
  • Mfr. Part No. GRM0335C1H6R0BA01D
Subtotal (1 reel of 1000 units)
£3.00(exc. VAT)
£0.003/unit
Currently unavailable
  • RS Stock No. 298-164
  • Mfr. Part No. VJ1206Y221KBETW1HV
Subtotal (1 reel of 3000 units)
£69.00(exc. VAT)
£0.023/unit
In Stock
  • RS Stock No. 298-177
  • Mfr. Part No. VJ1206Y221KBGTW1HV
Subtotal (1 bag of 200 units)
£7.60(exc. VAT)
£0.038/unit
Temporarily out of stock
  • RS Stock No. 185-1608
  • Mfr. Part No. GRM033R71E561KA01D
Subtotal (1 reel of 15000 units)
£30.00(exc. VAT)
£0.002/unit
Temporarily out of stock
  • RS Stock No. 188-0333
  • Mfr. Part No. B58035U7105M052
Subtotal (1 unit)
£14.14(exc. VAT)
£14.14/unit
In Stock
  • RS Stock No. 180-6501
  • Mfr. Part No. C0402C101J5GACAUTO
Subtotal (1 reel of 1000 units)
£9.00(exc. VAT)
£0.009/unit
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  • RS Stock No. 190-8905P
  • Mfr. Part No. B32654A2683K000
Subtotal 1 unit (supplied in a box)
£2.97(exc. VAT)
£2.97/unit
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  • RS Stock No. 181-3163
  • Mfr. Part No. 16SVPK330M
Subtotal (1 pack of 5 units)
£6.30(exc. VAT)
£1.26/unit
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  • RS Stock No. 180-6420
  • Mfr. Part No. C1210C107M9PAC7210
Subtotal (1 reel of 500 units)
£144.00(exc. VAT)
£0.288/unit
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  • RS Stock No. 190-8315
  • Mfr. Part No. B32653A4105K000
Subtotal (1 unit)
£1.40(exc. VAT)
£1.40/unit
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  • RS Stock No. 181-3498
  • Mfr. Part No. 885012006053
Subtotal (1 reel of 500 units)
£5.50(exc. VAT)
£0.011/unit
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  • RS Stock No. 181-2287P
  • Mfr. Part No. EEHZS1H221P
Subtotal 5 units (supplied on a continuous strip)
£9.80(exc. VAT)
£1.96/unit
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  • RS Stock No. 298-562
  • Mfr. Part No. VJ1812A101JXGTW1HV
Subtotal (1 reel of 2000 units)
£210.00(exc. VAT)
£0.105/unit
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  • RS Stock No. 185-3103
  • Mfr. Part No. GJM0335C1E120GB01D
Subtotal (1 reel of 15000 units)
£75.00(exc. VAT)
£0.005/unit
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  • RS Stock No. 185-3093
  • Mfr. Part No. GCG21BR71C475KA12L
Subtotal (1 reel of 3000 units)
£147.00(exc. VAT)
£0.049/unit
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  • RS Stock No. 185-1974
  • Mfr. Part No. GRM0335C1E5R6DA01D
Subtotal (1 reel of 2500 units)
£2.50(exc. VAT)
£0.001/unit
Temporarily out of stock
  • RS Stock No. 188-1965
  • Mfr. Part No. C1206X105K3RAC3316
Subtotal (1 reel of 2500 units)
£627.50(exc. VAT)
£0.251/unit
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  • RS Stock No. 287-491P
  • Mfr. Part No. EEEFK1A221AP
Subtotal 5 units (supplied on a continuous strip)
£3.23(exc. VAT)
£0.646/unit
In Stock
  • RS Stock No. 181-4019
  • Mfr. Part No. 885012207086
Subtotal (1 pack of 250 units)
£7.50(exc. VAT)
£0.03/unit
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  • RS Stock No. 181-4092
  • Mfr. Part No. 885012207088
Subtotal (1 pack of 250 units)
£7.50(exc. VAT)
£0.03/unit
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