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The rationale is simple – select values for components based on the tolerances with which they are able to be manufactured.

The E series preferred or standard resistor value ranges are internationally accepted and have been adopted by international standards organisations.

E6 E12 E24 E48 E96 E This process is followed through for all the values in a decade, creating a set of standard resistor values for each tolerance.

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: Later, the post—World War II baby boom and the invention of the transistor kicked off demand for consumer electronics goods during the d24.

From Wikipedia, the free encyclopedia. One example where values can be kept within the E3 series occurs with digital design where a relhe up or pull down resistor is needed.

E series of preferred numbers

Wikimedia Commons has media related to E12 values. The E6 series resistor values are also widely used within the industry.


Resistor E series tables of values Below are the common resistor values. These standard resistor values have a logarithmically based sequence and this enables the different values to be spaced in such a way that they relate r24 the component tolerance or accuracy. By having these standard resistor values, components from a variety of manufacturers can be chosen, making sourcing much easier and the cost of the components much less.

Resistor Values E6 E12 E24 E48 E96 E

The values in any decade can be derived by merely dividing or multiplying the table entries by powers of The different sets of standard resistor values are known by their E-series numbers: In any event, one should be aware of these practices to avoid confusion. The ohm resistor has a value ranging between and ohms.

It should be noted that some values in the E24 series don’t exist in Rfihe to E series.

Archived from the original on Occasionally E24, E48, E96 or even E series values may needed for high accuracy and close tolerance requirements. E6 Standard Resistor Series 1. rekhe

Standard Resistor Values: E3, E6, E12, E24, E48

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

E3 Standard Resistor Series 1. The exact value is rehie little is of little consequence and the value can be maintained within the E3 series.


Standard Resistor Values | E3 E6 E12, E24, E48 Series | Electronics Notes

The number following the “E” specifies the number of logarithmic steps per decade. Take then a resistor with a value of 1. The E96 and E series of standard resistor values also exist, but their use is much smaller than those in the other ranges given above.

Current resistor technology enables very close tolerance levels to be achieved, yet there is still a great benefit in using resistors even from the E3 series. World War II military production was a major influence for establishing common standards across many industries.

Below are the common resistor values.

E series of standard resistor values The standard resistor values are organised into a set of series of values known as the E-series.

While the “E” preferred value lists are the best way to insure one is stocking the optimum number of values for a given tolerance, a word of caution is in order with respect to what is actually available in the marketplace and certain real world practices. By using this site, you agree to the Terms of Use and Privacy Policy. The resistance of this component at the bottom of its tolerance band is 1. This page was last edited on 1 Novemberat