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Commons category link is on Wikidata Commons category link is on Wikidata using P 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.

Later, the post—World War II baby boom and the invention of the transistor kicked off demand for consumer electronics goods during the s. More accurate rwihe are available for some resistors, but these are not as widely available and costs are higher. The values in any decade can be derived by merely dividing or multiplying the table entries by powers rfihe From Wikipedia, the free encyclopedia.

This process is followed through for all the values in a decade, creating a set of ee24 resistor values for each tolerance. Wikimedia Commons has media related to E12 values. E12 Standard Resistor Series 1.

E series of preferred numbers

Rfihe series of standard resistor values The standard resistor values are organised into a set of series of values known as the E-series. This page was last edited on 1 Novemberat In any event, one should be aware of these practices to avoid confusion. The rationale is simple – select values for components based on the tolerances with which they are able to be manufactured.

deihe It should be noted that some values in the E24 series don’t exist in E48 to E series. 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 exact value is of little is of little consequence and the value can be maintained within the E3 series. The E series preferred or standard resistor value ranges are internationally accepted and have been adopted by international standards organisations.

Resistor Values E6 E12 E24 E48 E96 E

It reduces the number of different types of resistor used in a design and this simplifies purchasing and manufacturing processes. 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. Retrieved from ” https: 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: This allows easier purchasing migration between different tolerance parts.

In the early 20th centurycapacitor previously called condenser [1] [2] and resistor [3] [4] value increments were different than today. E3 Standard Resistor Series 1. 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. 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. The E6 series resistor values are also widely used within the industry. 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. List of International Electrotechnical Commission standards. Views Read Edit View history. By using this site, you agree to the Terms of Use and Privacy Policy.

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


Occasionally E24, E48, E96 or even E series values may needed for high accuracy and close tolerance requirements.

E6 E12 E24 E48 E96 E deihe It consists of the E3E6E12E24E48E96 and E series, where the number after the ‘E’ designates the quantity of value “steps” in each series. The actual resistance at the top of the tolerance band is 1. The table below is normalized for the decade between and 1, 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 to the component tolerance or accuracy.

The Electronic Industries Association EIAand other authorities, specify standard values for resistors, sometimes referred to as the “preferred value” system.

NOVA Elektronik – DIN/IEC Standardwerte E-Reihen

Archived from the original on 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. Take then a resistor with a value of rsihe. As transistor radio production migrated towards Japan during the s, it was critical for the electronic riehe to have international standards.

The EIA “E” series specify the preferred values for various tolerances. E6 Standard Resistor Series 1.

E3 has three resistors in each decade, E6 has six, E12 has twelve, and so forth. The number following the “E” specifies the number of logarithmic steps per decade. The different sets of standard resistor values are known by their E-series numbers: Also, the E d24 is used for 0.

Supplier Directory For everything from distribution to test equipment, components and more, our directory covers it. The different values are spaced such that the top of the tolerance band of one value and the bottom of the tolerance band of the next one do not overlap.