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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The E3 series is defined as a series of the numbers 1.
List of International Electrotechnical Commission standards. Archived PDF from the original on Views Read Edit View history.
This allows easier purchasing migration between different uec parts. Also, the E series is used for 0. Retrieved from ” https: This page was last edited on 1 Novemberat As transistor radio production migrated towards Japan during the s, it was critical for the electronic industry to have international standards.
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Later, the post—World War II baby boom and the invention of the transistor jec off demand for consumer electronics goods during the s.
World War II military production was a major influence for establishing common standards across many industries.
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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. Commons category link is on Wikidata Commons category link is on Wikidata using P 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. Currently, most electrolytic capacitors are manufactured with values in the E6 or E12 series, thus E3 series is likely obsolete.
E series of preferred numbers
Archived from the original on It should be noted that some values in the E24 series don’t exist in E48 to E series.
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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