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Suntan Basic Knowledge of Aluminum Electrolytic Capacitor

Suntan Technology Company Limited

  • ----All Kinds of Capacitors
  • As one of our customers asked us the construction of E-cap,incidentally we’d like to share below information about Suntan TS13 & TS14 series with you.

    An Aluminum Electrolytic Capacitor, usually simply called an electrolytic capacitor (e-cap), is a capacitor whose anode (+) consists of pure aluminum foil with an etched surface, covered with a uniformly very thin barrier layer of insulating aluminum oxide, which operates as a dielectric. The electrolyte, which covers the rough surface of the oxide layer, operates as the second electrode, the cathode (-). E-caps have the largest capacitance values per unit volume compared to the two other main conventional capacitor families, ceramic and plastic film capacitors, but much smaller capacitance than similar sized super capacitors.

    Aluminum electrolytic capacitors with non-solid electrolyte are the most inexpensive type and also those with widest range of sizes, capacitance and voltage values. They are made with capacitance values from 0.1 µF up to 2,700,000 µF (2.7 F), and rated voltages values from 4V up to 630V. The liquid electrolyte provides oxygen for re-forming or self-healing of the dielectric oxide layer. However, it can evaporate through a temperature-dependent drying-out process, which causes electrical parameters to drift, limiting the service life time of the capacitors.

    Here is the general production flow of E-caps for your reference. Any further problem, you can communicate with us freely.