Ceramic Capacitor Marking Reader

The value of the capacitor is indicated in picofarads.

Ceramic capacitor marking reader.

Has a very low dissipation factor and are very stable over wide variations in temperature frequency voltage and time. Here is how to read ceramic capacitor values. Markings of ceramic capacitor. Sometimes figures such as 10n will be seen and this indicates a 10nf capacitor.

Some small capacitance capacitors can be marked with an r between numbers. For beginners some values might prove confusing. The above image shows a mylar film capacitor. There are three exceptions for the last digit.

7 is not. Ceramic capacitors are generally smaller than types like electrolytic capacitors and therefore the markings need to be more concise. Npo type capacitors are frequently used for precision timing filtering frequency setting and tuning circuits. Atc provides component and custom integrated packaging solutions for the rf microwave and telecommunications industries atc designs develops manufactures and markets multilayer capacitors single layer capacitors resistive products inductors and custom thin film products for rf microwave and millimeter wave applications.

3r9 would be 3 9pf. Unlike resistors capacitors use a wide variety of codes to describe their characteristics. 682k is 6 8 nf 10 tolerance. American technical ceramics corp.

The markings on a ceramic capacitor are more concise in nature since it is smaller in size as compared to electrolytic capacitors. Thus for such concise markings many different types of schemes or solutions are adopted. 222k is a 2 2 nf capacitor with a 10 tolerance. If code is 3r9 then r is an indicator of values less than 10pf and has nothing to do with resistance.

Physically small capacitors are especially difficult to read due to the limited space available for printing. A variety of schemes may be used. Reading values printed on electrolytic capacitors is easy digits on ceramic capacitors need to know some theory. My article on ceramic disc capacitor values might help with the tolerance letters.

Values with the letter capital k represents 10 tolerance. Some capacitors are only marked as 0 1 or 0 01 mostly in these cases the values are given in uf. I have always been unaware of the markings on a disc ceramic capacitor such as j m and other symbols. Example 103k is a 10 nf capacitor with a 10 tolerance.

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.