Electrolytic Capacitors ( or aluminum capacitors ) are capacitors in which one of the two plates acting as an anode and a cathode, is a non-metallic substance called electrolyte. This type capacitors consist of two, wound on spools, thin aluminum foils - one of which is covered with a thin layer of aluminum oxide, such as insulation and wrapped in waxed paper soaked in electrolyte. This constitutes the anode in the condenser. The other aluminum foil roll , together with the liquid electrolyte represent the cathode. Both rolls together with liquid electrolyte are encapsulated in hermetically sealed housing.
Depending on the location of external terminals, electrolyte capacitors are axial and radial. Electrolytic capacitors also can be aluminum and tantalum . They are widely used in high-voltage circuits and low-frequency (low pass) filters , as well as in almost all types of electronics equipment.
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