How To Read Ceramic Disc Capacitor Values

The example capacitor has a 3 digit number printed on it 103. The letter j signifies the tolerance of 5.

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Electrolytic ceramic and polyesterwell start with electrolytics as they are the most straightforward ones to readpolyester and ceramic share the same labeling system but with some small differences.

How to read ceramic disc capacitor values. Ceramic disc capacitors have two to three digits code printed on them. When the first two numbers are multiplied with the multiplier the resulting value is the value of the capacitor in picofarads. The third digit is the multiplier which is 1000.

They are very easy to decode to find the value. The smallest capacitors made from ceramic film or tantalum use units of picofarads pf equal to 10 12 farads. Here the digit is 104 that means 10104pf 100000pf 100nf 01uf.

If a ceramic capacitor has three digits abc then the value would be ab10c pico farad. Ceramic disc capacitor code label will normally consist of three numbers followed by a letter. Work out the capacitance units from context.

For much larger capacitors the value is sometimes given in micro farads uf 10 6 farads. To make it a bit more difficult not all the capacitors share the same labeling system so we have to make a difference between the main 3 capacitor types. The first two significant digits represent the first two digits of the actual value which is 47.

The first two digits of printed code are the first two digits of capacitor value and the third digit gives the number of zeroes to be added so as to get capacitor value in pico farad. Diskceramic capacitor ceramic capacitor usually uses 3 digits like 102 103 101 for indicating its value and values in term of pico farad. This code indicates what the capacitance of the capacitor is.

If abc is 104 then the digit 104 means 10104pf 100000pf 100nf 01uf. In ceramic capacitor if the three digits are abc then the value would be ab10c pico farad. The first two digits in this case the 10 give us the first part of the value.

With ceramic capacitors the value you get is typically assumed to be in picofarads pf 10 12 farads. Larger capacitors the cylindrical aluminum electrolyte type or the double layer type use units of microfarads uf or uf equal to 10 6 farads. The first two numbers describe the value of the capacitor and the third number is the number of zeros in the multiplier.

Ceramic disc capacitors like the one on the left are printed with a code.