Those numbers are "peanuts" Lane and indicate the units you tested are in
decent shape. The manufacturer's catalogs usually include a simple formula
for calculating the expected/satisfactory leakage current for various
series in their product lines.
For example the expected leakage current for Mallory type CG capacitors is :
I = CxVx6x10^-6 or CxVx0.000006 ma, C in uf, V is rated max voltage, I
is
in ma. In this case the book also states that maximum leakage is not to
exceed 4.0 ma after 30 minutes.
For Mallory type CGS and CGH capacitors the formula is I = 0.006xSQRT(CxV),
max leakage current not to exceed 6.0 ma after 30 minutes.
Formulas published by Phillips, Sprague and CDE yield similar values for
their products (in general).
If you tell me what brand and series of caps you have, I may be able to
find the specific formula for you.
Phil
At 09:39 PM 5/23/99 -0700, zeitler@ibm.net wrote:
>
>What is the acceptable limit for leakage current on electrolytic capacitors?
>The units in use are 560uF 400 volt and 470uF 450 volt.
>
>I am measuring around 2 to 300 hundred micramps at the max voltage depending
>on the one being tested and need to know if this is in the safe zone.
>
>Lane Zeitler
>ku7i
>
>
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