Aluminum Electrolytic Capacitor Application Guide
This application guide focuses on the application of polar, non-solid aluminum electrolytic capacitors used in ripple-filtering applications such as used as input and output capacitors in
AIuminum electrolytic capacitors assume a special position among the various types of capacitors since their principle of operation relies, in part, on electrochemical processes.
Aluminum electrolytic capacitors can generally withstand rapid charging along with occasional overvoltage transient spikes of lim-ited energy. If transients above the capacitor's rated DC voltage are anticipated in the application, please contact us to discuss the best capacitor for the application.
Aluminum Electrolytic Capacitors offer high capacitance in a small size but suffer from issues like high leakage current and electrolyte evaporation. They have good self-healing properties, and their construction involves reactive aluminum and conducting electrolytes.
The anode of an aluminum electrolytic capacitor is an aluminum foil of extreme purity. The effective surface area of this foil is greatly enlarged (by a factor of up to 200) by electrochemical etching in order to achieve the maximum possible capacitance values.
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