Resistor Standard E12

The e12 series is probably the most common series and exist for almost every resistor. This calculator will select the closest standard resistor value from 1 5 or 10 standard eia values calculates the error and prints out a table of the standard values for the given tolerance.

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The E12 Series

E12 Pdf Fundamentals Standards And Codes Types Materials

The e12 series of resistor values including their color codes.

Resistor standard e12. Following this logic the preferred values for 10 tolerance resistors between 100 and 1000 ohms would be 100 120 150 180 220 270 330 and so on rounded appropriately. E3 has three resistors in each decade e6 has six e12 has twelve and so forth. The eia e number is the number of logarithmic steps.

These values are among the most common resistor values. When an engineer designs a circuit they work out the component values which make it work as well as possible. There are four more or less commonly used resistor series with 12 24 48 and 96 values per decade respectively.

For example some low value 1 resistors are available in e12 only. 1 22 and 47. For example for e12 has twelve steps between any power.

This may lead to values like 149 ohms or 255334 ohms. Standard resistor values 5 10 10 100 10k 10k 100k 10m 11 11 110 11k 11k 110k 11m 12 12 120 12k 12k 120k 12m 13 13 130 13k 13k 130k 13m 15 15 150 15k 15k 150k 15m 16 16 160 16k 16k 160k 16m 18 18 180 18k 18k 180k 18m 20 20 200 20k 20k 200k 20m 22 22 220 22k 22k 220k 22m 24 24 240 24k 24k 240k 24m. Resistor standard values e12 series.

Two decades of e12 values which would give resistor values of 1 w to 82 w the e series is a system of preferred numbers also called preferred values derived for use in electronic components. Generally 5 tolerance resistors are available in e24 and 1 resistors in e96 but this is not a hard and fast rule. The 120 ohm resistor has a value ranging between 110 and 130 ohms.

For 20 e6 10 e12 and 5 e24 resistors you can always find a standard resistor value within 20 10 or 5 respectively of the value you want. This graph shows all the standard resistor values which occur in the e12 series. This is the e12 series shown in the table below.

The chart also gives you an example of the color codes used for the different values. The different sets of standard resistor values are known by their e series numbers. The tolerance is 10.

The most basic series within the e range is the e3 series which has just three values. For the 2 e48 1 e96 and 05 e192 resistors you will not always be able to find a standard resistor value within 2 1 or 05 respectively of the value you want. It is called the e12 series because there are 12 values spaced exponentially across a change in value of a power of ten.