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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Views Read Edit View history. It consists of the E3E6E12E24E48E96 and E series, where the number after the ‘E’ designates the quantity of value “steps” in each series. Also, the E series is used for 0.
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The E3 series is defined as a series of the numbers 1. Retrieved from ” https: If a manufacturer sold resistors with E3 series iecc in a range of 1 ohm to 10 megohms, then the available resistance values would be: 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. 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 Archived PDF from the original on List of International Electrotechnical Commission standards.
World War II military production was a major influence for establishing common standards across many industries. Currently, most electrolytic capacitors are manufactured with values in the E6 or E12 series, thus E3 series is likely obsolete. 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. kec
Wikimedia Commons has media related to E12 values. In the early 20th centurycapacitor iecc called condenser   and resistor   value increments were different than today.
In other projects Wikimedia Commons. This allows easier purchasing migration between different tolerance parts.
E series of preferred numbers
This page was last edited on 1 Novemberat It should be noted that ie values in the E24 series don’t exist in E48 to E series. Archived from the original on Later, the post—World War II baby boom and the invention of the transistor kicked off demand for consumer electronics goods during the s.
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