Capacitor codes: Difference between revisions

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On larger capacitors their value is printed on the case or encapsulation. The values of small capacitors are indicated in an alphanumeric code. With older capacitor values were sometimes indicated by a colour code.<ref name="ccam">[https://www.electronics-notes.com/articles/electronic_components/capacitors/capacitor-codes-markings.php Capacitor Codes &amp; Markings], Electronics Notes</ref>
On larger capacitors their value is printed on the case or encapsulation. The values of small capacitors are indicated in an alphanumeric code. With older capacitor values were sometimes indicated by a colour code.<ref name="ccam">[https://www.electronics-notes.com/articles/electronic_components/capacitors/capacitor-codes-markings.php Capacitor Codes &amp; Markings], Electronics Notes</ref>


With small general purpose capacitors where values range from a few pF to less than 1 µF the convention arose that whole numbers designate values in picofarads while decimal fractions designates values in microfarads.<ref name="rcv">[https://web.archive.org/web/20120814104332/http://www.play-hookey.com:80/dc_theory/capacitor_values.html Reading Capacitance Values] by Ken Bigelow</ref>
With small general purpose capacitors where values range from a few pF to less than 1 µF the convention arose that whole numbers designate values in picofarads while decimal fractions designates values in microfarads.<ref name="rcv">[https://web.archive.org/web/20120814104332/http://www.play-hookey.com/dc_theory/capacitor_values.html Reading Capacitance Values] by Ken Bigelow</ref>


Often p, n and u are substituted for the decimal point. For example 8p2 for 8.2pF, n51 for 0.51nF or 4u7 for 4.7µF.
Often p, n and u are substituted for the decimal point. For example 8p2 for 8.2pF, n51 for 0.51nF or 4u7 for 4.7µF.