Ceramic Disk Capacitor Markings

This code indicates what the capacitance of the capacitor is.

Ceramic disk capacitor markings.

The third digit is the multiplier which is 1000. Ceramic capacitors are generally smaller than types like electrolytic capacitors and therefore the markings need to be more concise. The letter j signifies the tolerance of 5. They are very easy to decode to find the value.

There are several tolerance marking systems used. When the first two numbers are multiplied with the multiplier the. The early style of the ceramic disc capacitor could be more cheaply produced than the common ceramic tube capacitors in the 1950s and 1970s. Method of finding the value meaning of codes of capacitor.

Two of the most common are shown here. I have always been unaware of the markings on a disc ceramic capacitor such as j m and other symbols. Typically the markings on a capacitor may give the figures like 22 and 6v. Ceramic disc capacitor code label will normally consist of three numbers followed by a letter.

The first two digits in this case the 10 give us the first part of the value. A variety of schemes may be used. Taking a look. This indicates a 22µf capacitor with a maximum voltage of 6v.

An american company in the midst of the apollo program launched in 1961 pioneered the stacking of multiple discs to create a monolithic block. Ceramic disc capacitors like the one on the left are printed with a code. In addition to the capacitance value and possibly the working voltage or breakdown voltage the capacitor may be marked by its tolerance. The example capacitor has a 3 digit number printed on it 103.

Click here for resistor colour code and smd resistor code ceramic disc capacitors have two to three digits code printed on them. The first two numbers describe the value of the capacitor and the third number is the number of zeros in the multiplier. The first is used with small ceramic capacitors and appears as a single letter.