leakage current of electrolytics

[Larry Wolken]

Lane --

I would say the electolytic leakage figure should be in the 20 MILLIamps
range so you are probably fine.  If you can get hold a manual for for the
Sprague TO-5 05 TO-6 there should be a table in the back or use the
following formula:

I = kC + 0.3

where C = the capacitance in uF and I equals the leakage in MILLIamps and k
equals the following constant.

3-100 WVDC = .01
101-250 WVDC = .02
251-350 WVDC = .025
351-500WVDC = .04

This formula determines the limit of "good".

Obviously you want to give these larger caps as much as 2 to 3 minutes to
settle down to a reading.  Don't throw out a cap based on the reading after
a few seconds unless you see the milliameter pinned and going nowhere.

Happy leakage testing.

Larry Wolken N3OJD


===========
At 09:39 PM 5/23/99 -0700, Lane Zeitler 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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