Vintage Ceramic Capacitor Markings

Click here for resistor colour code and smd resistor code ceramic disc capacitors have two to three digits code printed on them.

Vintage ceramic capacitor markings.

The first two significant digits represent the first two digits of the actual value which is 47. The above image shows a mylar film capacitor. In addition to the capacitance value and possibly the working voltage or breakdown voltage the capacitor may be marked by its tolerance. Method of finding the value meaning of codes of capacitor.

A variety of schemes may be used. Sometimes figures such as 10n will be seen and this indicates a 10nf capacitor. The first two numbers describe the value of the capacitor and the third number is the number of zeros in the multiplier. The third digit is the multiplier which is 1000.

Chassis bottom plates natural aluminum finish. These will also use a xxm format to indicate value where the m is the multiplier and a tolerance letter from table 5 above. Different types of capacitors ceramic capacitor polarity and symbol. The ceramic capacitor is a non polarity device which means they do no have polarities.

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. There are several tolerance marking systems used. 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. When the first two numbers are multiplied with the multiplier the.

For example 102j with a black cap would a 1000 pf 5 c0g. There are three exceptions for the last digit. To get this value you multiply the leading digits 68 in this case by 10 raised to the power of the last digit 3 and the result is the capacitance in picofarads in this case we get 68x10 3 pf. The top 683 marking indicates the capacitance value which is 68 000 picofarads pf.

The letter j signifies the tolerance of 5. Ceramic capacitors are generally smaller than types like electrolytic capacitors and therefore the markings need to be more concise. 7 is not. The ceramic capacitor described in more detail in this article.

Polypropylene film 1600v capacitor markings. Ceramic capacitors are most commonly found in every electrical device and it uses a ceramic material as the dielectric. Some ceramic disks wear a color skull cap to indicate the dielectric. They are very easy to decode to find the value.

Two of the most common are shown here. Often the value may be given in picofarads.