Ceramic Disc Capacitor Markings

Ceramic disc capacitors have two to three digits code printed on them.

Ceramic disc capacitor markings.

Typically the markings on a capacitor may give the figures like 22 and 6v. A variety of schemes may be used. Ceramic disc capacitor code label will normally consist of three numbers followed by a letter. This letter represents the tolerance of the capacitor meaning how close the actual value of the capacitor can be expected to be to the indicated value of the capacitor.

The above image shows a pair of ceramic disk capacitors labeled only as 10 and 15 these capacitors and all those under 1000pf directly show their capacitance in picofarads. They are very easy to decode to find the value. The first is used with small ceramic capacitors and appears as a single letter. Capacitor tolerance markings in addition to the capacitance value and possibly the working voltage or breakdown voltage the capacitor may be marked by its tolerance.

There are several tolerance marking systems used. The third digit is the multiplier which is 1000. This indicates a 22µf capacitor with a maximum voltage of 6v. The first two significant digits represent the first two digits of the actual value which is 47.

A guide to understanding ceramic disc capacitor values. Ceramic capacitors are generally smaller than types like electrolytic capacitors and therefore the markings need to be more concise. When the first two numbers are multiplied with the multiplier the resulting value is the value of the capacitor in picofarads. Ceramic disc capacitors markings are a two or three digit value this tutorial explains how use the code to determine the capacitance in farads.

There is no negative indicator as this capacitor doesn t have a dedicated polarity and can be installed either way.