Fast & free stop-desk delivery from 4000 DA | Flexible payment | Technical support for your builds

Capacitors

481 results

Ceramic, electrolytic, polypropylene film and SMD capacitors, plus varistors and NTC thermistors, for board repair, power supplies and your electronic projects.

Child categories

Related categories

481 results

481 results

12…31

Choosing the right capacitor

Three values are usually enough: the capacitance (in pF, nF or µF), the working voltage and the dielectric type. For voltage, allow a margin: on a 12V rail use a 25V rated part, on rectified mains filtering go up to 400V. A capacitor working too close to its rated voltage runs hot and ages quickly.

  • Ceramic: unpolarized, for decoupling and oscillators. The dielectric matters — NP0/C0G (like the 18pF and 220pF YAGEO or WALSIN) stays stable, X7R is fine for general decoupling, Y5V loses a lot of capacitance under voltage and temperature.
  • Aluminum electrolytic: polarized, large values (100µF, 1000µF) for power supply smoothing. Respect the negative marking orientation.
  • Polypropylene film and CBB61 or lug-terminal run capacitors: starting and running single-phase motors, fans, air conditioners.
  • Varistor (MOV) type 14D431K and NTC MF52AT: surge protection and temperature sensing.

For SMD parts, check the package before ordering: 0402, 0603 and 0805 are not soldered the same way. Sizes and dielectrics are grouped under SMD Capacitors, filtering values under Chemical and Power Capacitors.

Frequently asked questions

What is the difference between X7R, Y5V and NP0 (C0G)?

NP0/C0G is the most stable with temperature and voltage, reserved for filters and oscillators where the value must be precise. X7R is a good compromise for decoupling, while Y5V can lose a large part of its capacitance under DC voltage and heat.

What voltage should be chosen for a capacitor?

Take at least 1.5 to 2 times the DC voltage actually present in the circuit. On mains, use parts designed for AC (X2, CBB61) and never a standard electrolytic.

Can an electrolytic be replaced with a ceramic of the same value?

Only for small values and if size allows: ceramic is unpolarized and has low ESR, but its actual capacitance drops under voltage depending on the dielectric. For smoothing large values, keep an aluminum electrolytic.

Which capacitor for a single-phase motor or fan?

A lug-terminal run capacitor or a CBB61 polypropylene type, matching the µF value and the AC voltage shown on the old one (for example 2µF 450VAC). See <a href='/category/condensateurs-film-polypropylene'>Polypropylene Film Capacitors</a>.

Why does capacitor price vary so much?

Technology (ceramic, electrolytic, film), voltage, tolerance and manufacturer all play a role: a low-voltage Y5V ceramic does not cost the same as a branded high-capacitance X7R or a power capacitor for a motor.