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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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Archived PDF from the original on This allows easier purchasing migration between different tolerance parts.

Later, the post—World War II baby boom and the invention of the transistor kicked off demand for consumer electronics goods during the s.

In other projects Wikimedia Commons.

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 This page was last edited on 1 Novemberat Retrieved from ” https: Commons category link is on Wikidata Commons category link is on Wikidata using P Currently, most electrolytic capacitors are manufactured with values in the E6 or E12 series, thus E3 series is likely obsolete.


List of International Electrotechnical Commission standards.

Archived from the original on Views Read Edit View history. Wikimedia Commons has media related to E12 values. In the early 20th centurycapacitor previously called condenser [1] [2] and resistor [3] [4] value increments were different than today.

E series of preferred numbers

As transistor radio production migrated towards Japan during the s, it was critical for the electronic industry to have international standards. Also, the E series is used for 0. 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.

It consists of the E3E6E12E24E48E96 and E series, where the number after the ‘E’ designates the quantity of value “steps” in each series.

It should be noted that some values in the E24 series don’t exist in E48 to E series. From Wikipedia, the free encyclopedia.

E series of preferred numbers – Wikipedia

World War II military production was a major influence for establishing common standards across many industries. The E3 series is defined as a series of the numbers 1. By using this site, you agree to the Terms of Use and Privacy Policy. 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.


If a manufacturer sold resistors with Ied series values in a range of 1 ohm to 10 megohms, then the available resistance values would be: