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Question electrolytic capacitor

cloudff7

Manufacturers of aluminum electrolytic capacitors in storage recommend energizing these components once every 1 or 2 years and the temperature range is 5-35C and humidity is below 75C. After this interval, under these maximum conditions, they recommend refurbishing.

Do these recommendations only work on new aluminum electrolytic capacitors with little or no use because their chemistry is new and unchanged, or does this recommendation also work on old aluminum electrolytic capacitors that are used and assembled in electronic circuits and manufactured in the early 1990s?

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    Some people replace all the Al capacitors in old test gear as the first step in refurbishing. Others (me included) are more optimistic and only replace ones that have failed or look suspect.

    The life of capacitors depends very much on temperature, voltage and ripple current.

    I've not measured and degradation in new unused electrolytic capacitors  even when they are 20 years old.

    MK

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  • 0

    Some people replace all the Al capacitors in old test gear as the first step in refurbishing. Others (me included) are more optimistic and only replace ones that have failed or look suspect.

    The life of capacitors depends very much on temperature, voltage and ripple current.

    I've not measured and degradation in new unused electrolytic capacitors  even when they are 20 years old.

    MK

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