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Home> Industry Information> Dry goods ruby ​​electrolytic capacitor life authority calculation

Dry goods ruby ​​electrolytic capacitor life authority calculation

November 02, 2020

The origin of the life calculation formula

The working status and working environment of Aluminum Electrolytic Capacitors are the main factors affecting their life.

Among many factors, the influence of the ambient temperature and the magnitude of the ripple current have the greatest effect on the life of the capacitor.

By using the temperature coefficient and the ripple current coefficient, the life of a particular condition can be calculated by analyzing the increase and decrease of the basic life.

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Life calculation formula

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How to calculate the internal rising temperature △Tj D0a996b0384fc0dff7e2bb0d026d1107.png

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Ripple current measurement method D0a996b0384fc0dff7e2bb0d026d1107.png

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Ripple Current Calculation Method D0a996b0384fc0dff7e2bb0d026d1107.png

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Calculation Example D0a996b0384fc0dff7e2bb0d026d1107.png

Ripple current calculation method for PFC circuit

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Capacitor internal temperature (△Tj) method D0a996b0384fc0dff7e2bb0d026d1107.png

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Method for obtaining ambient temperature (Ta) D0a996b0384fc0dff7e2bb0d026d1107.png

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Life calculation formula D0a996b0384fc0dff7e2bb0d026d1107.png

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Rubycon capacitor life prediction D0a996b0384fc0dff7e2bb0d026d1107.png

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