Ceramic Disc Capacitor Markings

The first is used with small ceramic capacitors and appears as a single letter.

Ceramic disc capacitor markings.

They are very easy to decode to find the value. The first two numbers describe the value of the capacitor and the third number is the number of zeros in the multiplier. Ceramic disc capacitor code label will normally consist of three numbers followed by a letter. The first two significant digits represent the first two digits of the actual value which is 47.

Ceramic capacitors are generally smaller than types like electrolytic capacitors and therefore the markings need to be more concise. Typically the markings on a capacitor may give the figures like 22 and 6v. When the first two numbers are multiplied with the multiplier the resulting value is the value of the capacitor in picofarads. The third digit is the multiplier which is 1000.

Two of the most common are shown here. This indicates a 22µf capacitor with a maximum voltage of 6v. A guide to understanding ceramic disc capacitor values. There are several tolerance marking systems used.

There is no negative indicator as this capacitor doesn t have a dedicated polarity and can be installed either way. Ceramic capacitors which are usually tiny pancakes with two pins typically list the tolerance value as one letter immediately after the three digit capacitance value. Ceramic disc capacitors markings are a two or three digit value this tutorial explains how use the code to determine the capacitance in farads. 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.

A variety of schemes may be used.