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The number following the “E” specifies the number of logarithmic steps per decade. Take then a resistor with a value of 1. The rationale is simple – select reihee for components based on the tolerances with which they are able to be manufactured.
The ohm resistor has a value ranging between and ohms. The table below is normalized for the decade between and reihs, The E3 series resistors are the most widely used and hence these values will be the most common resistor values used within the electronics industry.
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.
Views Read Edit View history. E series of standard resistor values The rreihe resistor values are organised into a set of series of values known as the E-series. They provide a wider range of common resistor values that can be used. The resistance of this reohe at the bottom of its tolerance band is 1.
However, this is not always the case as can be seen by comparing the E24 and E96 lists. In any event, one should be aware of these practices to avoid confusion.
Retrieved from ” https: 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. 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.
E series of preferred numbers
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 The standard resistor values are organised into a set of series of values known as the E-series. Below are the common resistor values. The values in any decade can be derived by merely dividing or multiplying the table entries by powers of From Wikipedia, the free encyclopedia.
Archived from the original on Resistor E series tables of values Below are the common resistor values. The EIA preferred values or standard resistor values can be summarised in a tabular form to give the different values within each decade.
Archived PDF from the original on It reduces the number of different types of resistor used in a design and this simplifies purchasing and manufacturing processes.
E3 has three resistors in each decade, E6 has six, E12 has twelve, and so forth. In other projects Wikimedia Commons. The Electronic Industries Association EIAand other authorities, specify standard values for resistors, sometimes referred to as the “preferred value” system.
Resistor Values E6 E12 E24 E48 E96 E
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: As transistor radio production migrated towards Japan during the s, it was critical for the electronic industry to have international standards.
The E series preferred or standard resistor value ranges are internationally accepted and have been adopted by international standards organisations. Later, the post—World War II baby boom and the invention of the transistor kicked off reie for consumer electronics goods during the s.
The series are as follows: 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. Also, the Reihf series is used for 0. The EIA “E” series specify the preferred values riehe various tolerances.
E6 Standard Resistor Series 1. 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 eeihe. Resistor E series The EIA preferred values or e224 resistor values can be summarised in a tabular form to give the different values within each decade. List of International Electrotechnical Commission standards. E12 Standard Resistor Series 1.
E6 E12 E24 E48 E96 E The different sets of standard resistor values are known by their E-series numbers: This allows easier purchasing migration between different tolerance parts.
Standard Resistor Values: E3, E6, E12, E24, E48
E3 Reiue Resistor Series 1. This process is followed through for all the values in a decade, creating a set of standard resistor values for each tolerance.
Wikimedia Commons has media related to E12 values. Commons category link is on Wikidata Commons category link is on Wikidata using P More accurate tolerances are available for some resistors, but these are not as widely available and costs are higher.
It consists of the E3E6E12E24E48E96 and E series, where the number after the ‘E’ designates the quantity of value “steps” in each series. World War II military production was a major influence for establishing common standards across many industries. The E6 series resistor values are also widely used within the industry.
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.