How long is the life of electrolytic capacitors?
For example, the electrolytic capacitor with a rated maximum temperature of 85 ° C has a life of 1,000 hours under the ambient temperature of 85 ° C. The ambient temperature is reduced to 60 ° C, and the life can be extended to about 10,000 ° C. When the ambient temperature is reduced to 40 ° C, the life can reach about 80,000 hours.
Factors affecting the life of electrolytic capacitors
The service life of electrolytic capacitors is not only related to the level of the ambient temperature, but also to the magnitude of the ripple current.
Since thermal stress has a decisive influence on the service life of electrolytic capacitors, the heat loss caused by ripple current is an important factor affecting the service life of electrolytic capacitors.
Ripple current is the AC component current flowing through the electrolytic capacitor. It is affected by ambient temperature and AC frequency. The maximum allowable value of ripple current is different for different ambient temperatures. When the ambient temperature is constant, within the allowable range, the larger the ripple current flowing, the shorter the service life of the electrolytic capacitor.
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