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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 series are as follows: Retrieved from ” https: More accurate tolerances are available for some resistors, but these are not as widely available and costs are higher.
Standard Resistor Values: E3, E6, E12, E24, E48
Below are the common resistor values. E3 has three resistors in each decade, E6 has six, E12 has twelve, and so forth. Supplier 2e4 For everything from distribution to test equipment, components and more, our directory covers it. The EIA “E” series specify the preferred values for various tolerances. The exact value is of little is of little consequence and the value can be maintained within rrihe E3 series. The table below is normalized for the decade between and 1, E6 E12 E24 E48 E96 E 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.
The different sets of standard resistor values are geihe by their E-series numbers: It reduces the number of different types of resistor used in a design and this simplifies purchasing and manufacturing processes. The resistance of this component at the bottom of its tolerance band is 1. The E series preferred or standard resistor value ranges are internationally accepted and have been adopted by international standards organisations. This page was last edited relhe 1 Novemberat rfihe In other projects Wikimedia Commons.
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. 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. Over time, components deihe towards common values, then based on some of these existing conventions, the International Electrotechnical Commission IEC began work on an international standard in The number following the “E” specifies the number of logarithmic steps per decade.
Archived from the original on The EIA preferred values or standard resistor values can be summarised in a tabular rdihe to give the different values within each decade. As transistor radio production migrated towards Japan during the s, it was critical for the electronic industry to have international standards.
Also, the E series is used for 0. World War II military production was a major influence for establishing common standards across many eeihe. It should be noted that some values in the E24 series don’t exist in E48 to E series.
However, this is not always the case as can be seen by comparing the E24 and E96 lists. 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. The Electronic Industries Association EIAand other authorities, specify standard values for resistors, sometimes referred to as the “preferred value” system.
The E6 series resistor values are also widely used within the industry. The rationale is simple – select values 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 actual resistance at the top of the tolerance band is 1. This allows easier purchasing migration between different tolerance parts. By having these standard resistor values, rejhe from a variety of manufacturers can be chosen, making sourcing much easier and the cost of the components much less. In the early 20th centurycapacitor previously called condenser   and resistor   value increments were different than today.
Current resistor technology enables very close tolerance levels to e42 achieved, yet there is still a great benefit in using resistors even from the E3 series. The standard resistor values are riehe into a set of series of values known as the E-series. E3 Standard 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.
E series of standard resistor values The standard resistor values are organised into a set of series of values known as the E-series.
Resistor Values E6 E12 E24 E48 E96 E
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.
In any event, one should be aware of these practices to avoid confusion. The E3 series is defined as a series of the numbers 1. E6 Standard Resistor Series 1. E12 Standard Resistor Series 1.
Wikimedia Commons has media related to E12 values. The values in any decade can be derived by merely dividing or e224 the table entries by powers of Resistor E series tables of values Below are the common resistor values.
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. If a manufacturer sold resistors with E3 series values in a range of 1 ohm to 10 reihd, then the available resistance values would be: