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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£3.01(exc. VAT)
£0.301/unit
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  • RS Stock No. 212-6633
  • Mfr. Part No. R75MW510050H3J
Subtotal (72 units, in trays of 72)
£441.936(exc. VAT)
£6.138/unit
Temporarily out of stock
  • RS Stock No. 144-7438
  • Mfr. Part No. YFF18PH0J225MT000N
Subtotal (20 units, in packs of 20)
£1.74(exc. VAT)
£0.087/unit
Currently unavailable
  • RS Stock No. 197-2239
  • Mfr. Part No. MAL225729561E3
Subtotal (50 units, in boxes of 50)
£708.60(exc. VAT)
£14.172/unit
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  • RS Stock No. 373-323
  • Mfr. Part No. EKRG500ELL101MJ09S
Subtotal (5 units, in packs of 5)
£4.13(exc. VAT)
£0.826/unit
Temporarily out of stock
  • RS Stock No. 163-6978
  • Mfr. Part No. 860160275037
Subtotal (500 units, in boxes of 500)
£317.50(exc. VAT)
£0.635/unit
Currently unavailable
  • RS Stock No. 163-6615
  • Mfr. Part No. 860040574005
Subtotal (800 units, in boxes of 800)
£132.00(exc. VAT)
£0.165/unit
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  • RS Stock No. 915-5673
  • Mfr. Part No. CGA3E1X7S1C225K080AC
Subtotal (50 units, in packs of 50)
£3.95(exc. VAT)
£0.079/unit
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  • RS Stock No. 755-4305
  • Mfr. Part No. QYX1H153KTP
Subtotal (25 units, in packs of 25)
£4.90(exc. VAT)
£0.196/unit
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  • RS Stock No. 185-5172
  • Mfr. Part No. 875135219003
Subtotal (3500 units, on reels of 3500)
£3,867.50(exc. VAT)
£1.105/unit
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  • RS Stock No. 144-3351
  • Mfr. Part No. 1EUTSJ102M0
Subtotal (2 units, in packs of 2)
£4.80(exc. VAT)
£2.40/unit
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  • RS Stock No. 852-3312
  • Mfr. Part No. K180J15C0GF5TL2
Subtotal (1 unit)
£0.19(exc. VAT)
£0.19/unit
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  • RS Stock No. 146-6416
  • Mfr. Part No. C0603C105K4RACTU
Subtotal (4000 units, on reels of 4000)
£52.00(exc. VAT)
£0.013/unit
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  • RS Stock No. 798-6737
  • Mfr. Part No. GRM033R11A472KA01D
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£0.50(exc. VAT)
£0.001/unit
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  • RS Stock No. 276-3709
  • Mfr. Part No. DSS1NB32A682Q91A
Subtotal (10 units, on tapes of 10)
£2.38(exc. VAT)
£0.238/unit
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  • RS Stock No. 181-3523
  • Mfr. Part No. 885012207103
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£5.50(exc. VAT)
£0.11/unit
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  • RS Stock No. 170-6133
  • Mfr. Part No. LLL185R71A104MA11L
Subtotal (4000 units, on reels of 4000)
£148.00(exc. VAT)
£0.037/unit
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  • RS Stock No. 210-5601
  • Mfr. Part No. 50SVT39M
Subtotal (400 units, on reels of 400)
£396.80(exc. VAT)
£0.992/unit
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  • RS Stock No. 501-9611
  • Mfr. Part No. F931E335MB
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£3.27(exc. VAT)
£0.327/unit
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  • RS Stock No. 194-3444
  • Mfr. Part No. B32926D3156K000
Subtotal (45 units, in boxes of 45)
£276.75(exc. VAT)
£6.15/unit
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