Ceramic Disc Capacitor Identification

A lacquer or ceramic coating protects the capacitor against moisture and other ambient influences.

Ceramic disc capacitor identification. 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. Capacitor identification capacitor marking review. Ceramic capacitors come in various shapes and styles. In many instances where the capacitor is small no voltage coding is provided and care must be taken when using a capacitor without any knowledge of its working voltage.

Capacitor values are usually tiny often in the millionths or billionths of a farad. There are several tolerance marking systems used. Ceramic disc capacitor single layer disc resin coated with through hole leads. Ceramic capacitor definition a ceramic capacitor is a capacitor which uses a ceramic material as the dielectric.

Multilayer ceramic chip capacitor mlcc rectangular block for surface mounting. In addition to the capacitance value and possibly the working voltage or breakdown voltage the capacitor may be marked by its tolerance. 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. The working voltage for a capacitor is very important and therefore this parameter is often marked on capacitors and particularly in situations where there is space for alphanumeric coding.

To express those small values succinctly we use the metric system. The capacitor on the left is of a ceramic disc type capacitor that has the code 473j printed onto its body. 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.

Some of the most common are. Then by just using numbers and letters as codes. The following prefixes are the modern convention. The letter j signifies the tolerance of 5.

Then the 4 1 st digit the 7 2 nd digit the 3 is the multiplier in pico farads pf and the letter j is the tolerance and this translates to. When the first two numbers are multiplied with the multiplier the resulting value is the value of the capacitor in picofarads. 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 above image shows a mylar film capacitor.

The top 683 marking indicates the capacitance value which is 68 000 picofarads pf. Ceramic disc capacitor code label will normally consist of three numbers followed by a letter. Capacitor working voltage codes. The first two significant digits represent the first two digits of the actual value which is 47.

47pf 1 000 3 zero s 47 000 pf 47nf or 0 047uf the j indicates a tolerance of 5. Ceramic disc capacitors have two to three digits code printed on them. The two most common types are multi layer ceramic capacitors and ceramic disc capacitors. Two of the most common are shown here.

The third digit is the multiplier which is 1000.