In this video is explained what eseries and standard values for resistors are and how to use them. Two decades of e12 values, which would give resistor values of 1. Dcrcw e3 standard thick film chip resistors datasheet pdf. 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. Because of this, all resistors with a tolerance of 10% overlap. Eseries values standard series values in a decade for.
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. This physics video tutorial explains how to use the resistor color code chart to determine the value of the resistance of a resistor in an electric circuit. Describe different classes of resistor according to the eia preferred value system. The most common preferred value series is the e24 series. Resistors and capacitors are available in a limited range of values, according to their manufacturing precision. Technical articles standard values used in capacitors, inductors and resistors. The 120 ohm resistor has a value ranging between 110 and ohms. The e series is a system of preferred numbers also called preferred values derived for use in electronic components. The tables below show the values for some of the more common preferred series.
The electronic industries association eia, and other authorities, specify standard values for resistors, sometimes referred to as the preferred value system. Take as an example a resistor that has a value of 1 ohm and a tolerance of 20%. 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. Normally this would be the value closest to the calculated one for the series you are using. The resistance of this component at the bottom of its tolerance band is 1. The actual resistance at the top of the tolerance band is 1. Successive values within a decade series are related approximately by a factor.