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. 788-2893
  • Mfr. Part No. C1608X5R1A106K080AC
Subtotal (10 units, in packs of 10)
£0.81(exc. VAT)
£0.081/unit
Temporarily out of stock
  • RS Stock No. 276-3763
  • Mfr. Part No. GRM21BR61A476ME15L
Subtotal (10 units, on tapes of 10)
£4.14(exc. VAT)
£0.414/unit
Temporarily out of stock
  • RS Stock No. 884-7258
  • Mfr. Part No. GRM188R61A226ME15D
Subtotal (50 units, in packs of 50)
£4.20(exc. VAT)
£0.084/unit
Temporarily out of stock
  • RS Stock No. 788-2985P
  • Mfr. Part No. CGA3E2X7R1H104K080AA
Subtotal (50 units, supplied on a continuous strip)
£1.50(exc. VAT)
£0.03/unit
In Stock
  • RS Stock No. 222-9520P
  • Mfr. Part No. LGU2G121MELA
Subtotal (5 units, supplied in a bag)
£10.10(exc. VAT)
£2.02/unit
Temporarily out of stock
  • RS Stock No. 538-1629
  • Mfr. Part No. C410C103K5R5TA
Subtotal (5 units, in packs of 5)
£1.42(exc. VAT)
£0.284/unit
In Stock
  • RS Stock No. 247-8164P
  • Mfr. Part No. GRM31CR71H475KA12L
Subtotal (10 units, supplied on a continuous strip)
£1.67(exc. VAT)
£0.167/unit
In Stock
  • RS Stock No. 711-1390
Subtotal (100 units, in packs of 100)
£8.60(exc. VAT)
£0.086/unit
Temporarily out of stock
  • RS Stock No. 915-9114
  • Mfr. Part No. C1608X5R1A226M080AC
Subtotal (20 units, in packs of 20)
£1.88(exc. VAT)
£0.094/unit
In Stock
  • RS Stock No. 526-0960
  • Mfr. Part No. EEUFM0J151
Subtotal (5 units, in packs of 5)
£1.42(exc. VAT)
£0.284/unit
In Stock
  • RS Stock No. 707-6631P
Subtotal (5 units, supplied in a bag)
£6.04(exc. VAT)
£1.208/unit
Temporarily out of stock
  • RS Stock No. 788-3063
  • Mfr. Part No. C3216X5R1V226M160AC
Subtotal (5 units, in packs of 5)
£3.19(exc. VAT)
£0.638/unit
Temporarily out of stock
  • RS Stock No. 247-8183
  • Mfr. Part No. GRM32ER71E226KE15L
Subtotal (10 units, on tapes of 10)
£6.16(exc. VAT)
£0.616/unit
Last RS stock
  • RS Stock No. 827-4577P
  • Mfr. Part No. AY2222M35Y5US63L7
Subtotal (25 units, supplied in a box)
£4.85(exc. VAT)
£0.194/unit
Last RS stock
  • RS Stock No. 144-7286
  • Mfr. Part No. CGA1A2C0G1E560J030BA
Subtotal (250 units, in packs of 250)
£4.00(exc. VAT)
£0.016/unit
Being discontinued
  • RS Stock No. 715-2316
  • Mfr. Part No. UCS2W6R8MPD
Subtotal (10 units, in packs of 10)
£4.06(exc. VAT)
£0.406/unit
Currently unavailable
  • RS Stock No. 691-1212P
  • Mfr. Part No. C1206C226M8PACTU
Subtotal (10 units, supplied on a continuous strip)
£2.56(exc. VAT)
£0.256/unit
In Stock
  • RS Stock No. 788-7378
  • Mfr. Part No. 6TPE100MPB
Subtotal (5 units, in packs of 5)
£5.04(exc. VAT)
£1.008/unit
In Stock
  • RS Stock No. 272-7822
  • Mfr. Part No. VJ0603A100JXACW1BC
Subtotal (200 units, on tapes of 200)
£4.20(exc. VAT)
£0.021/unit
In Stock
  • RS Stock No. 241-6527P
  • Mfr. Part No. B32529C0105J189
Subtotal (5 units, supplied on a continuous strip)
£2.36(exc. VAT)
£0.472/unit
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