The E series is a system of preferred numbers (also called preferred values) derived for use in IEC release history: IEC (aka IEC ). IEC Preferred Number Series for Resistors and Capacitors. Find the most up-to-date version of IEC at Engineering

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Other types of electrical components are either specified by the Renard series for example fuses or are defined in relevant product standards for example IEC for wires.

The two main differences between each major group is the number of significant digits 2 digits for E3 to E24, 3 digits for E48 to E and different rounding rules.

List of International Electrotechnical Commission standards.

Retrieved from ” https: Archived from the original on Later, the post—World 06063 II baby boom and the invention of the transistor kicked off demand for consumer electronics goods during the s.


Archived PDF from the original on World War II military production was a major influence for establishing common standards across many industries.

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Over time, components evolved towards common values, then based on some of these existing conventions, the International Electrotechnical Commission IEC began work on an international standard in From Wikipedia, the free encyclopedia.

In the early 20th centurycapacitor previously called condenser [1] [2] and resistor [3] [4] value increments were different than today. Wikimedia Commons has media related to E12 values. In other projects Wikimedia Commons.

By using this site, you agree to the Terms of Use and Privacy Policy. The E3 series is defined as a series of the numbers 1. Also, the E series is used for 0.

Commons category link is on Wikidata Commons category link is on Wikidata using P If a manufacturer sold resistors with E3 series values in a range of 1 ohm to 10 megohms, then the available resistance values would be: Views Read Edit View history.


As transistor radio production migrated towards Japan during the s, irc was critical for the electronic industry to have international standards.

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It should be noted that some values in the E24 series don’t exist in E48 to E series. This page was last edited on 1 Novemberat This allows easier purchasing migration between different tolerance parts.

It consists of the E3E6E12E24E48E96 and E series, where the number after the ‘E’ designates the quantity of value “steps” in iev series. Currently, most electrolytic capacitors are manufactured with values in the E6 or E12 series, thus E3 series is likely obsolete.