ESR60/ESR70 User Guide April 20 2 – Rev 8
Page 9
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.
10 16 25 35 63 160 250
4.7µF >40Ω 35.0Ω 29.0Ω 24.0Ω 9.0Ω 6.0Ω 3.0Ω
10µF 20.0Ω 6.0Ω 4.0Ω .0Ω 9.3Ω 7.7Ω 6.3Ω
22µF 9.0Ω 7.5Ω 6.2Ω 5. Ω 4.2Ω 3.5Ω 2.9Ω
47µF 4.2Ω 3.5Ω 2.9Ω 2.4Ω 2.0Ω .60Ω .40Ω
100µF 2.0Ω .60Ω .40Ω . 0Ω 0.93Ω 0.77Ω 0.63Ω
220µF 0.90Ω 0.75Ω 0.62Ω 0.5 Ω 0.42Ω 0.35Ω 0.29Ω
470µF 0.42Ω 0.35Ω 0.29Ω 0.24Ω 0.20Ω 0. 6Ω 0. 3Ω
1000µF 0.20Ω 0. 6Ω 0. 4Ω 0. Ω 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 0.0 Ω
10,000µF 0.02Ω 0.02Ω 0.0 Ω 0.0 Ω 0.0 Ω 0.0 Ω 0.0 Ω
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.
For any particular capacitance and voltage rating,
a lower ESR reading is generally better than a higher ESR reading. For
good quality capacitors it is common for the ESR readings to be much
lower than the figures shown in the above table.
