Series E6 E24 E96 Commdon ratio 10 1.46 10 1.21 10 1.10 10 1.02 The values are rounded up or down based on the number of effective digits. Notes 6 12 24 96 The values are rounded up or down based on the number of effective digits. For basic guidelines on using resistors,see the technical reports issued by Japan Electronics and Further is E12 series which have 12 resistor values in each decade. The resistor tolerance is ±10%. E24 series have tolerance range of ±5%. E48 series have tolerance range of ±2%. E96 series have tolerance range of ±1%. E192 series have tolerance range of ≤±0.5%. Below tables shows summary of different E series and their resistance The values are 10, 12, 15, 18, 22, 27, 33, 39, 47, 56, 68, 82, then it continues 100, 120, 150 etc. Notice how the E24 series has smaller value steps in between the gaps. What is a 5% resistor? The tolerance gives the % deviation that the real value is allowed to be different from the stated or nominal value. The ordering code for a RC0402 0.0625W chip resistor value 100KΩwith ±5% tolerance, supplied in 7-inch tape reel of 10,000 units per reel is: RC0402JR-07100KL. including values 10/11/13/15/20/75 of E24 series 5%, E24 series : 3 digits First two digits for significant figure and 3rd digit for number of zeros RC0805 / RC1206 / RC1210 Enter a resistor value to find its closest standard resistor value. Results given for 1%, 5% and 0.1% components, (E series E24, E96, and E192). The E6, E12, and E24 series have had some their values moved around a bit . The E48 and E96 series exactly match the geometric series. The E192 Figure 3 shows a set of bars that illustrate the range of values covered each resistor value in the E6 series. Note that each resistor range overlaps with the adjacent resistor ranges. Standard values of nominal resistance are taken from the E24 series for resistors with a tolerance of ±5% and ±2%. The values of the E24 series are in accordance with "IEC publication 60063". Limiting values Note 1. The maximum voltage that may be continuously applied to the resistor element, see "IEC publication 60115-8". TYPE A decade of the E12 values shown with their electronic color codes on resistors. List of values for each E series: E3 values (40% tolerance) 1.0, 2.2, 4.7 E6 values (20% tolerance) 1.0, 1.5, 2.2, 3.3, 4.7, 6.8 E12 values (10% tolerance) 1.0, 1.2, 1.5, 1.8, 2.2, 2.7, 3.3, 3.9, 4.7, 5.6, 6.8, 8.2 E24 values (5% tolerance) select x = 3, R = 120. That is, you use the R ranges from the next higher series, for example, E24, to determine the limits of each E12 value. Once you find the correct x value, use a lookup table for the E12 value because rounding and truncating does not always give the the exact value of the series. In industrial design, preferred numbers (also called preferred values or preferred series) are standard guidelines for choosing exact product which gives resistor values from 1 to 82 ohms (Ω). The E series is another system of preferred numbers. It consists of the E1, E3, E6, E12, E24, E48, E96 and E192 series. Based on some of the 6uPnJ.