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Commons category link is on Wikidata Commons category link is on Wikidata using P It should be noted that some values in the E24 series don’t exist in E48 to E series. 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: It consists of the E3E6E12E24E48E96 and E series, where the number after the ‘E’ designates the quantity of value “steps” in each series. Resistor E series tables of values Below are the common resistor values.

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

As transistor radio production migrated towards Japan during the s, it was critical for the electronic industry to have international standards. Resistor E series The EIA preferred values or standard resistor values can be summarised in a tabular form to give the different values within each decade. One example where values can be kept within the E3 series occurs with digital design where a pull up or pull down resistor is needed.

The series are as follows: It reduces the number of different types of resistor used in a design and this simplifies purchasing and manufacturing processes. The number following the “E” specifies the number of logarithmic steps 2e4 decade.


In the early 20th centurycapacitor previously called condenser [1] [2] and resistor [3] [4] value increments were different than today. The E3 series is defined as a series of the numbers 1. The standard resistor values are organised into a set of series of values known as the E-series. The different sets of standard resistor values are known by their E-series numbers: The actual resistance at the top of the tolerance band is 1.

They provide a wider range of common resistor values that can be used. Retrieved from ” https: From Wikipedia, the free encyclopedia. The table below is normalized for the decade between and 1, The resistance of this component at the bottom of its tolerance band is 1. The EIA Electrical Industries Association which is based in North America is one organisation that has adopted the system and as a result the resistor value series are often referred to as the EIA standard resistor values. This allows easier purchasing migration between different tolerance parts.

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. In other projects Wikimedia Commons. Often designs try to keep to the E3 or E6 standard resistor values, only using those in the E12, E24, E48 or E96 if absolutely necessary.

E6 E12 E24 E48 E96 E 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. For analogue designs it is a little more flexibility is often needed, but even E6 or E12 standard resistor values can be used without difficulty in the design.


The rationale is simple – select values for components based on the tolerances with which they are able to be manufactured. The EIA “E” series specify the preferred values for various tolerances. Archived PDF from the original on Below are the common resistor values.

By having these standard resistor values, components from a variety of manufacturers can be chosen, making sourcing much easier and the cost of eeihe components much less. List of International Electrotechnical Commission standards.

The ohm resistor has a value ranging between and ohms. The values in any decade can be derived by merely dividing or multiplying the table entries by powers of The E6 series resistor values are also widely used within the industry. The E3 series resistors are the most widely used and hence these values will be the most common resistor values used within rrihe electronics industry.

Also, the E series is used for 0. World War II military production was a major influence for establishing common standards across many industries.

E series of preferred numbers – Wikipedia

Take then a resistor with a value of 1. This process is followed through for all the values in a decade, creating a set of standard resistor values for each tolerance. The Electronic Industries Association EIAand other authorities, specify standard values for resistors, sometimes referred to as the “preferred value” system. The preferred value system has its origins in the early years of the last century at a time when most resistors were carbon-graphite with relatively poor manufacturing tolerances.

In any event, one should be aware of these practices to avoid confusion.