= E series of preferred numbers
{wiki=E_series_of_preferred_numbers}
The E series, or E series of preferred numbers, is a standard set of values used primarily in engineering and manufacturing to provide a consistent methodology for selecting component values, such as resistors and capacitors. These preferred numbers are defined in various standards, including the ANSI/EIA-198 standard, which is used for electronics. The E series is structured in a logarithmic scale and comprises several series that are based on a specific multiplication factor, denoted as "E".
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