Capacitors. Character encoding. Reference data

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Capacitors. Character encoding. Reference data

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Encyclopedia of radio electronics and electrical engineering / Reference materials

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In accordance with IEC standards, four ways of coding the nominal capacitance are used in practice.

1. Encoding with 3 digits

The first two digits indicate the value of the capacitance in picofarads (pf), the last - the number of zeros. When the capacitor has a capacitance of less than 10 pF, then the last digit can be "9". For capacitances less than 1.0 pF, the first digit is "0". The letter R is used as the decimal point. For example, code 010 is 1.0 pF, code 0R5 is 0.5 pF.

Capacitors. Character encoding. Reference data

* Sometimes the last zero is not indicated.

2. Encoding with 4 digits

4-digit coding options are possible. But in this case, the last digit indicates the number of zeros, and the first three indicate the capacity in picofarads (pF).

Capacitors. Character encoding. Reference data

examples:

Capacitors. Character encoding. Reference data

3. Capacitance marking in microfarads

The decimal point can be replaced by the letter R.

4. Mixed alphanumeric marking of capacity, tolerance, TKE, operating voltage

Unlike the first three parameters, which are marked in accordance with the standards, the operating voltage of different companies has different alphanumeric markings.

Publication: cxem.net

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