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. 257-1106
  • Mfr. Part No. 885012206126
Subtotal (10 units, on tapes of 10)
£3.11(exc. VAT)
£0.311/unit
In Stock
  • RS Stock No. 257-5911
  • Mfr. Part No. CL05C101JB51PNC
Subtotal (250 units, on tapes of 250)
£3.25(exc. VAT)
£0.013/unit
In Stock
  • RS Stock No. 628-3813
  • Mfr. Part No. EEUFC1H471B
Subtotal (5 units, in packs of 5)
£6.20(exc. VAT)
£1.24/unit
In Stock
  • RS Stock No. 257-5744
  • Mfr. Part No. 875115652014
Subtotal (500 units, on reels of 500)
£279.00(exc. VAT)
£0.558/unit
In Stock
  • RS Stock No. 923-2874
  • Mfr. Part No. EEUEB1C102
Subtotal (200 units, in bags of 200)
£66.60(exc. VAT)
£0.333/unit
Currently unavailable
  • RS Stock No. 252-7067
  • Mfr. Part No. MAL214650471E3
Subtotal (500 units, in boxes of 500)
£307.00(exc. VAT)
£0.614/unit
In Stock
  • RS Stock No. 242-7532P
  • Mfr. Part No. CK45-B3AD102KYVNA
Subtotal (50 units, supplied on a continuous strip)
£2.85(exc. VAT)
£0.057/unit
In Stock
  • RS Stock No. 242-1160P
  • Mfr. Part No. 885012207102
Subtotal (10 units, supplied on a continuous strip)
£0.83(exc. VAT)
£0.083/unit
In Stock
  • RS Stock No. 252-7107
  • Mfr. Part No. MAL225051102E3
Subtotal (250 units, in boxes of 250)
£420.00(exc. VAT)
£1.68/unit
Last RS stock
  • RS Stock No. 652-1979
  • Mfr. Part No. 400MXG470MSN35X35
Subtotal (1 unit)
£7.88(exc. VAT)
£7.88/unit
In Stock
  • RS Stock No. 257-5652
  • Mfr. Part No. CL05C680JB51PNC
Subtotal (10000 units, on reels of 10000)
£40.00(exc. VAT)
£0.004/unit
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  • RS Stock No. 242-7556P
  • Mfr. Part No. FA28C0G2A103JRU06
Subtotal (10 units, supplied on a continuous strip)
£1.42(exc. VAT)
£0.142/unit
Last RS stock
  • RS Stock No. 252-5226
  • Mfr. Part No. 293D475X9050D2WE3
Subtotal (10 units, on tapes of 10)
£7.59(exc. VAT)
£0.759/unit
Temporarily out of stock
  • RS Stock No. 185-5562P
  • Mfr. Part No. 885392004005
Subtotal (500 units, supplied on a reel)
£13.00(exc. VAT)
£0.026/unit
In Stock
  • RS Stock No. 242-1050
  • Mfr. Part No. 885012006083
Subtotal (50 units, in packs of 50)
£2.75(exc. VAT)
£0.055/unit
Temporarily out of stock
  • RS Stock No. 242-7549
  • Mfr. Part No. CNC6P1X7R2A475K250AE
Subtotal (1000 units, on reels of 1000)
£393.00(exc. VAT)
£0.393/unit
Currently unavailable
  • RS Stock No. 253-9289
  • Mfr. Part No. MAL214699501E3
Subtotal (1 unit)
£2.10(exc. VAT)
£2.10/unit
Last RS stock
  • RS Stock No. 243-1681
  • Mfr. Part No. MKP1848Se52090JK2A
Subtotal (99 units, in trays of 99)
£135.729(exc. VAT)
£1.371/unit
In Stock
  • RS Stock No. 275-9357P
  • Mfr. Part No. 870575774003
Subtotal (1 unit, supplied on a continuous strip)
£1.89(exc. VAT)
£1.89/unit
Temporarily out of stock
  • RS Stock No. 276-3772
  • Mfr. Part No. GRM31CD80J107MEA8L
Subtotal (2000 units, on reels of 2000)
£232.00(exc. VAT)
£0.116/unit
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