All resistor values entered with greater than 3 digits will be displayed in scientific notation. Preferred number series for resistors and capacitors specifies the preferred values in the e24 series, which is the most often used. Variations of working out resistor values, including tolerances and kilo and mega ohms as well as working backwards from the values to the colours. If you want to find out the color bands for a value. Thick film lead free chip resistors specification 0603 1% marking table table 1 code e48 e96 code e48 e96 code e48 e96 code e48 e96 01 100 100 25 178 178 49 316 316 73 562 562 02 102 26 182 50 324 74 576 03 105 105 27 187 187 51 332 332 75 590 590 04 107 28 191 52 340 76 604 05 110 110 29 196 196 53 348 348 77 619 619 06 1 30 200 54 357 78 634. 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. The first calculator gives values based on standard led types. 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. Clicking calculate r1 and r2 will find the optimum pair of resistors from the selected range of preferred values, for a given v in and v out. These values are generally available in multiples of 0. Standard electronic decade value tables decade table vishay dale document number 31001 for technical questions, contact.
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 others values can be obtained by multiply these values for powers of 10. Enter the desired resistance value and the calculated closest standard resistor is returned for each accuracy group. How to find burnt resistor value even without a schematic diagram page 5 jestine yong. How to memorize the standard resistor values quora. Resistor tolerances are generally 20%, 10% 5%, 2% and 1%. The standard e3, e6, e12, e24, e48 and e96 resistor values are listed below. The excel cell formula below calculates the nearest standard 1%resistor value without using a lookup table or macro. Apr 26, 2020 this process is followed through for all the values in a decade, creating a set of standard resistor values for each tolerance. These standard resistor values are those which can be bought. Mar 30, 2016 this application lists the e48 resistor sizes standard resistor values from the e series range, perfect for electrical and electronic engineers or electronics hobbyists to select the correct.
Resistor values is an electrical engineering program that will calculate the value of a 4 band resistor. Jan 02, 20 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. 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. Resistor calculator has an automatic program update system. Unauthorized duplication or distribution is strictly prohibited. Jul 03, 2019 the e6 series resistor values are also widely used within the industry. 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 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. The e6 series resistor values are also widely used within the industry.
Excel formula calculates standard 1%resistor values. Colour codes and examples of 4band and 5band resistors. Standard base resistor values are given in the following tables for the most commonly used tolerances 1%, 5%, 10%, along with. It will then provide you with the most suitable and closest resistor of the e series e12, e24, e48 etc. The trial version of resistor values is limited to resistance values of. The values are as follows and note there are 24 values per column or decade, hence e24. Eia preferred values table for e24, e48, e96, and e196. A resistor is a passive electronic component that opposes the flow of electrical current through it. This application lists the e48 resistor sizes standard resistor values from the e series range, perfect for electrical and electronic engineers or electronics hobbyists to select the correct. The number following the e specifies the number of logarithmic steps per decade.
Clicking calculate r1 and r2 will find the optimum pair of resistors from the selected range of preferred values. The 120 ohm resistor has a value ranging between 110 and ohms. Resistor color calculator the resistor color calculator can be used for free of course and was written in javascript by myself around the year 1999 or 2000. In both of these calculations, the color code scheme is applicable for 4, 5, and 6 band resistors.
Easy browsing of topics with interactive table of content. It can also be used to learn the resistor color code with the lesson and quiz included. Atlence resistor viewer allows electronics engineers to get the value and characteristics of a resistor from its color bands and vice versa. Resistors are manufactured in series of standard resistance values.
The number after the e denotes the number of values the series contains per decade. A resistor is a passive twoterminal electrical component that implements electrical resistance as a circuit element. Youll find the values for the e6, e12, e24, e48, e96 and e192 series or preferred resistor values in this table. Type or electronically paste the text below into any cell other than a1. 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. Handy formulae for series and parallel resistors, power dissipation, and led current limiting resistors. These are referred to as preferred values or eseries, and they are published in standard iec 60063. 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. The bigger the value of a resistor the more it opposes the current flow. Standard eia decade resistor values table e6 e12 e24. Eia standard resistor values by tolerance% move the decimal point to achieve the actual value desired. How to find burnt resistor value even without a schematic. The eight official e24 values shown in bold do not exist in the e48, e92, e192 series. Handy formulae for series and parallel resistors, power dissipation, and.
Jan 01, 2020 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. In the example below, note the label indicating the value of the resistor. The rationale is simple select values for components based on the tolerances with which they are able to be manufactured. To manufacture resistors of every possible value would be impractical. These calculators give values for led current limiting series resistors. Resistors are one of the four fundamental types of passive electronic components. Revision 04oct06 335 standard resistance values are obtained from the decade table by multiplying by powers of 10. How to find burnt resistor value even without a schematic diagram. All about resistors low high power symbols markings resistance most commonly used resistors in electronic circuits have a wattage rating of 12w or there are smaller resistors 18w and 116w and higher 1w, 2w.
More accurate tolerances are available for some resistors, but these are not as widely available and costs are higher. You will not have to look for the updates in continuous intervals. Using 10% tolerance devices as an example, suppose that the first preferred value is 100 ohms. High wattage resistor values are usually stamped on the resistor itself. The table below is normalized for the decade between and 1, e series of standard resistor values the standard resistor values are organised into a set of series of values known as the eseries. If there is no tolerance band, then find the side that has.
The nextreasonable value is 120 ohms because the 100 ohm resistor with a 10%. This process is followed through for all the values in a decade, creating a set of standard resistor values for each tolerance. Dec, 2017 standard resistor values electronics basictables an introduction to electronics 2 4 colour coding and most common resistor values solved table j 1 standard resistance values resistor v share this. Eseries values standard series values in a decade for. Two decades of e12 values, which would give resistor values of 1.
The e24 series is for resistors with a 5% tolerance precision. 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 values and. The e series is a system of preferred numbers also called preferred values derived for use in electronic components. But i remember the most common values simply through constant exposure. This should only be used if the led forward voltage and current are not known.
Standard resistor values electronics basictables an introduction to electronics 2 4 colour coding and most common resistor values solved table j 1 standard resistance values resistor v share this. Resistor color code calculator 3, 4 and 5 band resistors. A resistor is a passive electronic component that opposes the. Common resistor values pdf resistor engineering tolerance. Although it is theoretically possible to produce components of any value, in practice the need for inventory simplification has. 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. Standard eia decade values table e6 e12 e24 e48 e96 e192.
The original was based on an old cardboard sliding card my dad used to have to determine values and colors and it has been available at weethet. Standard eia decade values table 100 to 1,000 decadee6 e12 e24 e48. Common resistor values pdf free download as pdf file. 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. Standard series values in a decade for resistances and. Find the optimal resistors to use for a resistor divider, or find which combination of. Standard base resistor values are given in the following tables for the most commonly used tolerances 1%, 2%, 5%, 10%, along with typically available resistance ranges. 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. 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. Selecting resistor values traditionally has been a manual process where the calculated value is. 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. Resistor value and ratio calculator nightshade electronics.
Instead resistors are made in a restricted range of values and each value is quoted as a specific number of ohms plus or minus a percentage of the quoted value, this range of possible values is called the tolerance of the resistor. Resistor values are organised into a set of different series of preferred values or standard resistor values. The tolerance band on a resistor indicates the spread of possible values of any particular resistor, for example a resistor marked as 47k. A free online environment where users can create, edit, and share electrical schematics, or convert between popular file formats like eagle, altium, and orcad. 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. Code e48 e96 code e48 e96 code e48 e96 code e48 e96 01 100 100 25 178 178 49 316 316 73 562 562 02 102 26 182 50 324 74 576 03 105 105 27 187 187 51 332 332 75 590 590 04 107 28 191 52 340 76 604. The excel cell formula below calculates the nearest standard 1% resistor value without using a lookup table or macro. 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. Explains all resistor types, properties and background theory. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses. Selecting resistor values traditionally has been a manual process where the calculated value is matched to a real value in a printed lookup table. They are commonly available from component suppliers. Highpower resistors that can dissipate many watts of electrical power as heat, may be used as.
930 422 343 1417 231 1327 844 180 1196 849 1438 70 1286 252 1273 1223 151 593 1407 218 1164 1042 1095 21 969 1042 221 115 1411 1476 512 1225 756 1062 307 868 1010 220 1147 625 1089 85 1320 1078