The values are as follows and note there are 24 values per column or decade, hence e24. Resistors of a series fall into one of nominal resisrance ranges shown in the table above. Analogs products are no longer available at the present time. Two decades of e12 values, which would give resistor values of 1. Eia preferred values table for e24, e48, e96, and e196. High wattage resistor values are usually stamped on the resistor itself. Eia standard resistor values by tolerance% move the decimal point to achieve the actual value desired. Resistor values will determine the value of a resistor based on the color bands or the reverse, it can display the color bands of a resistance value entered by the user.
Preferred number series for resistors and capacitors specifies the preferred values in the e24 series, which is the most often used. When decoding the resistor color bands, consult a resistor color code table like the one below. A higher number correlates to a lower tolerance and a higher precision. Handy formulae for series and parallel resistors, power dissipation, and led current limiting resistors. A resistor is a passive electronic component that opposes the flow of electrical current through it. But i remember the most common values simply through constant exposure. It can also be used to learn the resistor color code with the lesson and quiz included. The only circuits that come near to zero resistance are superconductors. Excel formula calculates standard 1%resistor values. 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. Using standard resistor values can greatly impact the accuracy and predictability of a circuit by eliminating rounding errors incurred at the end of the design. The first calculator gives values based on standard led types.
Although it is theoretically possible to produce components of any value, in practice the need for inventory simplification has. The electronic industries association eia, and other authorities, specify standard values for resistors, sometimes referred to as the preferred value system. Electronic components are at the core of electronics technology. Resistor colour code solver is a featured resistor value calculator which offers both color code to value and value to color code conversions.
The, end of the pathway to the other, the higher the resistance. How to memorize the standard resistor values quora. It makes little sense to produce a 105 ohm resistor since 105 ohms falls within the 10% tolerance range of the 100 ohm resistor. These standard resistor values are those which can be bought. Standard eia decade resistor values table e6 e12 e24. How to find burnt resistor value even without a schematic diagram page 5 jestine yong. This should only be used if the led forward voltage and current are not known. E24 e e24 gir deg det aller siste fra aksjemarkedet og tar. Revision 04oct06 335 standard resistance values are obtained from the decade table by multiplying by powers of 10. The e series consists of the e3, e6, e12, e24, e48, e96 and e192 series. The 120 ohm resistor has a value ranging between 110 and ohms. They are the standard e3, e6, e12, e24, e48 and e96 resistor values. Both of these conversions are available for 4 band, 5 band, and 6 band resistors.
Although it is theoretically possible to produce components of any value, in practice the need for inventory. The e24 series is for resistors with a 5% tolerance precision. In the example below, note the label indicating the value of the resistor. Resistors there is always some resistance in every circuit. Using standard resistor values can greatly impact the accuracy and. The eight official e24 values shown in bold do not exist in the e48, e92, e192 series. Select the first 3 or 4 bands for 20%, 10% or 5% resistors and all 5 bands for precision 2% or less, 5band resistors. The first resistor in the chart with 4 bands tells you the minimum information you can learn from a resistor. Youll find the values for the e6, e12, e24, e48, e96 and e192 series or preferred resistor values in this table.
They are particularly useful for resistor values that are not in any way critical. If there is no tolerance band, then find the side that has. For the first two bands, find that colors corresponding digit value. These series are standardized and commercialized, common for low power. A circuit is always made up of some wire, so there will be some resistance there. Standard series values in a decade for resistances and. 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. Includes a table explaining the colours and their values, can be used as a homework or extension task or just to teach about values of resistors. The resistance of resistors often follows the e series. Everything from passive components like resistors, capacitors and the like through devices like diodes, and onto other electronic components like transistors, fets and even. Resistor power dissipation you can calculate the power in watts dissipated by a resistor as long as you know any two of 1 the voltage across the resistor, 2 the current flowing through it, and 3 the value of the resistor. Resistors are manufactured in series of standard resistance values. In 1952 the iec international electrotechnical commission decided to define the resistance and tolerance values into a norm, to ease the mass manufacturing of resistors. The rationale is simple select values for components based on the tolerances with which they are able to be manufactured.
The information presented here in the logwell database is. This application lists the e48 resistor sizes standard resistor values from the e series range, perfect for electrical and electronic engineers or. Standard eia decade values table e6 e12 e24 e48 e96 e192. The e series is a system of preferred numbers also called preferred values derived for use in electronic components. Use the resistor color code chart below to understand how to use the color code system. The calculator above will display the value, the tolerance and performs a simple check to verify if the calculated resistance matches one of the eia standard values. If you want to find out the color bands for a value. Resistor values is an electrical engineering program that will calculate the value of a 4 band resistor. Standard series values in a decade for resistances and capacitances e3 to e192 according to iec 60063 e192 e96 e48 e192 e96 e48 e192 e96 e48 e192 e96 e48 e24 e12 e6 e3 100 100 100 178 178 178 316 316 316 562 562 562 10 10 10 10 101 180 320 569 11 102 102 182 182 324 324 576 576 12 12. Resistor color codes color value black 0 brown 1 red 2 orange 3 yellow 4 green 5 blue 6 violet 7 gray 8 white 9 the first two colors on the resistor shown in figure ht43 are actual numbers, read directly from the color table, as shown in table ht41. Standard electronic decade value tables decade table vishay dale document number 31001 for technical questions, contact. These calculators give values for led current limiting series resistors. The values of the e24 e96 series are, cl e96 series. Resistor color code calculator 3, 4 and 5 band resistors.
The trial version of resistor values is limited to resistance values of. Using 10% tolerance devices as an example, suppose that the first preferred value is 100 ohms. Unauthorized duplication or distribution is strictly prohibited. Make sure you select a resistor with a suitable power rating for the maximum power you expect it to dissipate. Colour codes and examples of 4band and 5band resistors. Variations of working out resistor values, including tolerances and kilo and mega ohms as well as working backwards from the values to the colours. When looking at the chart, note the illustration of three round resistors with numerous color code bands.
These are referred to as preferred values or eseries, and they are published in standard iec 60063. When designing a circuit you need to round calculated resistor values to a preferred value. Following this logic, the preferred values for 10% tolerance resistors between 100 and 1,000 ohms would be 100, 120, 150, 180, 220, 270, 330 and so on rounded appropriately. The others values can be obtained by multiply these values for powers of 10. Resistors are available in a number of standard ranges, often called preferred values these ranges, or series, are set out by the electronic industries association eia, and are e3, e6, e12, e24, e48, e96 and e192. The number after the e denotes the number of values the series contains per decade. It consists of the e3, e6, e12, e24, e48, e96 and e192 series, where the number after the e designates the quantity of value steps in each series. Even the battery has parts that offer resistance to the flow of electrons. All standard resistor values can be found in the table below. They are commonly available from component suppliers. In this software, you have 8 color codes for tolerance level, which include brown, red, green, blue, violet, silver, gold, and grey. Determination of a resistors value according to its colors, determination of a resistors color accordng to its value, determination of a resistors standard according to its value, support for resistors with from 3 to 6 bands, color code table that includes decoding example, eia standard value table e6, e12, e24, e48, e96, e192. Excel stores a lookup table containing standard eia decade resistor. Atlence resistor viewer allows electronics engineers to get the value and characteristics of a resistor from its color bands and vice versa.
In this article youll find an interactive table in which you can find the standard resistor values, as used in electronics, and defined by the iec. Eseries values standard series values in a decade for. It consists of the e3, e6, e12, e24, e48, e96 and e192 series, where the number after the e designates the quantity of value steps in each series the bmw 6 series is known as a bmw luxuy car and this is where it all begun. Standard resistor values in 1952 the iec international electrotechnical commission decided to define the resistance and tolerance values into a norm, to ease the mass manufacturing of resistors. The tolerance band on a resistor indicates the spread of possible values of any particular resistor, for example a resistor marked as 47k. This resistance that is from the parts of the circuit itself especially. Type or electronically paste the text below into any cell other than a1. Get the band colors of a resistor and the standard values youve just determined the theoretical value of a resistor and want to get the closest standard. The excel cell formula below calculates the nearest standard 1%resistor value without using a lookup table or macro. There is a huge variety of different components that are available with a variety of different functions.