Standard values of nominal resistance are taken from the E24 series for resistors with a tolerance of ±5%, and E96 series for resistors with a tolerance of ±1%. The values of the E24/E96 series are in accordance with "IEC publication 60063" Derating The power that the resistor can dissipate depends on the operating temperature; see Fig.2 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. The EIA E number is the number of logarithmic steps. For example, for E12 has twelve steps between any power. Re: Voltage Divider Help. For the resistor ladder calculations, assume V (1) = 2 V and simply write out the voltage divider equations for V (2), V (3), V (4). Some of the resistors in the upper or lower half of the divider would be a sum (series) of individual resistors. You will end up with 3 equations and 4 unknowns (Rn values). 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 12 104 184 328 583 13 Standard SMD Resistor Values - decade 1 to 10 MΩ. The SMD resistor code E24 stands for 9.1 MΩ / 2%, in words: nine point one Megaohms with two percent tolerance. SMD resistors with a 2%, 5% or 10% tolerance can be marked using A11 format (letter followed by two digits). The letter indicates the multiplier. The digits (numbers) range from 01 Standard resistance values are obtained from the decade table by multiplying by powers of 10. As an example, 13.3 can represent Ω, 133 Ω, 1.33 kΩ, 13.3 kΩ, 133 kΩ, 1.33 MΩ. Document Number 31001 For technical questions, contact: ff2aresistors@vishay.com www.vishay.com Revision 04-Oct-06 335 E24 Series - E24 Series is used for resistors having 5% tolerance. It has twenty-four preferred values, each of two significant digits, for each decade as follows: 10 11 12 13 15 16 18 20 22 24 27 30 33 36 39 43 47 51 oZ3x.

e24 series resistor values