Message text written by Rich Measures
>As I understand it, the lifespan of an electrolytic capacitor approx.
doubles for each ten degrees C below its rated operating temp. --
provided that the temp. stays above the minimum allowable.<
>From an STC application note:
"Reducing the element temperature greatly extends the life of the
electrolytic capacitor. A component which is endurance tested for 1000
hours with an element temperature of 85C can have a life expectancy of
100,000 hours at an element temperature of 40C...The leakage current
follows a logarithmic law, approximately doubling for each 10C increase in
temperature."
>From an RS Components application note:
"As a rule of thumb, the useful life of an electrolytic capacitor can be
considered to reduce by a factor of 2 for each 10C increase in operating
temperature..."
John Nelson
GW4FRX
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