Ceramic Capacitor Marking Reader

Some capacitors are only marked as 0 1 or 0 01 mostly in these cases the values are given in uf.

Ceramic capacitor marking reader.

682k is 6 8 nf 10 tolerance. The above image shows a mylar film capacitor. Sometimes figures such as 10n will be seen and this indicates a 10nf capacitor. I have always been unaware of the markings on a disc ceramic capacitor such as j m and other symbols.

American technical ceramics corp. Markings of ceramic capacitor. The value of the capacitor is indicated in picofarads. 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.

If code is 3r9 then r is an indicator of values less than 10pf and has nothing to do with resistance. 222k is a 2 2 nf capacitor with a 10 tolerance. My article on ceramic disc capacitor values might help with the tolerance letters. 7 is not.

Some small capacitance capacitors can be marked with an r between numbers. Thus for such concise markings many different types of schemes or solutions are adopted. Like resistors has some coding which needs to decipher printed digits on ceramic capacitors also needs deciphering. The top 683 marking indicates the capacitance value which is 68 000 picofarads pf.

3r9 would be 3 9pf. Has a very low dissipation factor and are very stable over wide variations in temperature frequency voltage and time. Ceramic capacitors are generally smaller than types like electrolytic capacitors and therefore the markings need to be more concise. Example 103k is a 10 nf capacitor with a 10 tolerance.

The markings on a ceramic capacitor are more concise in nature since it is smaller in size as compared to electrolytic capacitors. Npo type capacitors are frequently used for precision timing filtering frequency setting and tuning circuits. Reading values printed on electrolytic capacitors is easy digits on ceramic capacitors need to know some theory. Values with the letter capital k represents 10 tolerance.

Unlike resistors capacitors use a wide variety of codes to describe their characteristics. Physically small capacitors are especially difficult to read due to the limited space available for printing. A variety of schemes may be used. 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. For beginners some values might prove confusing.