Owner manual

Atlas ESR User Guide February 2008 – Rev 4
Page 8
Typical Values of ESR
It is not possible to provide a definitive rule for values of ESR that are
acceptable for all situations.
The expected value of ESR largely depends on the capacitance value and the
voltage rating of the capacitor but also depends on temperature ratings and
other factors. Some capacitors are manufactured to exhibit very low ESR
values, whilst conventional low cost parts are likely to exhibit higher values
but still be acceptable.
As a rough guide only, the following table shows “typical” values of ESR for a
range of different capacitance and voltage ratings.
10V 16V 25V 35V 63V 160V 250V
4.7µF >20Ω >20Ω >20Ω >20Ω 19.0Ω 16.0Ω 13.0Ω
10µF 20.0Ω 16.0Ω 14.0Ω 11.0Ω 9.3Ω 7.7Ω 6.3Ω
22µF 9.0Ω 7.5Ω 6.2Ω 5.1Ω 4.2Ω 3.5Ω 2.9Ω
47µF 4.2Ω 3.5Ω 2.9Ω 2.4Ω 2.0Ω 1.60Ω 1.40Ω
100µF 2.0Ω 1.60Ω 1.40Ω 1.10Ω 0.93Ω 0.77Ω 0.63Ω
220µF 0.90Ω 0.75Ω 0.62Ω 0.51Ω 0.42Ω 0.35Ω 0.29Ω
470µF 0.42Ω 0.35Ω 0.29Ω 0.24Ω 0.20Ω 0.16Ω 0.13Ω
1000µF 0.20Ω 0.16Ω 0.14Ω 0.11Ω 0.09Ω 0.08Ω 0.06Ω
2,200µF 0.09Ω 0.07Ω 0.06Ω 0.05Ω 0.04Ω 0.03Ω 0.03Ω
4,700µF 0.04Ω 0.03Ω 0.03Ω 0.02Ω 0.02Ω 0.02Ω 0.01Ω
10,000µF 0.02Ω 0.02Ω 0.01Ω 0.01Ω 0.01Ω 0.01Ω 0.01Ω
Please note that the above figures are only typical
figures for standard grade
electrolytics at room temperature, please verify readings against expected
values for the particular type of capacitor you are testing.