E12 SERIE WEERSTANDEN

The rationale is simple – select values for components based on the tolerances with which they are able to be manufactured. The Electronic Industries Association EIA , and other authorities, specify standard values for resistors, sometimes referred to as the “preferred value” system. In other projects Wikimedia Commons. 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. The ohm resistor has a value ranging between and ohms. 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. In the early 20th century , capacitor previously called condenser [1] [2] and resistor [3] [4] value increments were different than today. In any event, one should be aware of these practices to avoid confusion.

List of International Electrotechnical Commission standards. Views Read Edit View history. World War II military production was a major influence for establishing common standards across many industries. Archived PDF from the original on The rationale is simple – select values for components based on the tolerances with which they are able to be manufactured. By using this site, you agree to the Terms of Use and Privacy Policy. 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.

Other types of electrical components are either specified by the Renard series for weerstnden fuses or are defined in relevant product standards for example IEC for wires.

The E3 series is defined as a series of the numbers 1. The number following the “E” specifies the number of logarithmic steps per decade. The rationale is simple – select values for components based on the tolerances with which they are able to be manufactured.

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This allows easier purchasing migration between different tolerance parts. List of International Electrotechnical Commission standards.

E series of preferred numbers

Commons category link is on Wikidata Commons category link is on Wikidata using P As transistor radio production migrated towards Japan during the s, it was critical for the weerstznden industry to have international standards. 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.

By using this site, you agree to the Terms of Use and Privacy Policy. The Electronic Industries Association EIAand other authorities, specify standard values for resistors, sometimes referred to as the “preferred value” system. 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 In the early 20th centurycapacitor previously called condenser [1] [2] and resistor [3] [4] value increments were different than today.

Archived PDF from the original on Views Read Edit View history. This page was last edited on 27 Januaryat It consists of the E3E6E12E24E48E96 and E series, where the number after the ‘E’ designates the quantity of value “steps” in each series. It should be noted that some values in the E24 series don’t exist in E48 to E series.

The values in any decade can be derived by merely dividing or multiplying the table entries by powers of Also, the E series is used for 0. Currently, most electrolytic capacitors are manufactured with values in the E6 or E12 series, thus E3 series is likely obsolete.

OKAPHONE – Colour coding of resistors

The ohm resistor has a value ranging between and ohms. 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: World War II military production was a major influence for establishing common standards across many industries.

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The series are as follows: The table below is normalized for the decade between and 1, 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. Archived from the original on However, this is not always the case as can be seen by comparing the E24 and E96 lists. From Wikipedia, the free encyclopedia.

Colour coding of resistors

Retrieved from ” https: E6 E12 E24 E48 E96 E In any event, one should be aware of these practices to avoid confusion. Wikimedia Commons has media related to E12 values. Later, the post—World War II baby boom and the invention of the transistor kicked off demand for consumer electronics goods during the s. 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 other projects Wikimedia Commons.

The EIA “E” series specify the preferred values for various tolerances.