EXV477M025S9PAA

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Aluminum electrolytic capacitors are polarized electrical energy storage devices widely used in all kinds of electronic equipment. EXV477M025S9PAA, as one kind of aluminum electrolytic capacitors, has an application field and working principle of its own.

Application Field

EXV477M025S9PAA aluminum electrolytic capacitors are usually used in high voltage power supplies, including photovoltaic inverters, battery chargers, and DC/DC converters, for their features of large capacity, long life, and high power. This capacitor also have wide application range in industrial, automotive, and consumer electronic equipment.

In industrial equipment, EXV477M025S9PAA aluminum electrolytic capacitors can be used for motor start and control, filter network, and snubber increasing. In automotive industry, it is widely used for DC-DC converters, brake system, headlights, dimming, and so on. In consumer market, this type capacitor can provides durable performance for battery chargers, consumer AC-DC power supplies, and other household products.

Working Principle

EXV477M025S9PAA aluminum electrolytic capacitors are of cylindrical construction and an electrode is wound with aluminum foil as the anode and it is immersed in an electrolyte of individual internal electric field. By definition, an electrolytic capacitor is a polarized electronic component with two electric plates with different functions: an anode and a cathode. The anode foil of the EXV477M025S9PAA capacitor is made of pure aluminum, sometimes tantalum or nickel. This anode is covered with a very thin layer of oxide which works as a dielectric layer between the two electrodes and this anode is also covered with a special etched paper to increase performance efficiency.

Additionally, this special anode foil is wound with an electrolytic paper impregnated with a special electrolytic solution. This electrolytic paper keeps the capacitor\'s form during its life span, forming a cylindrical shape. This assembled unit is the actual anode. Meanwhile, the cathode of the EXV477M025S9PAA aluminum electrolytic capacitors is a pure aluminum foil and it’s the outer plate of the assembled unit, sealed with self-adhesive aluminum trim strips. The cathode works as an inner plate; in contact with the electrolyte, it connects the anode foil to the external pin.

It works in the same way as other regular aluminum electrolytic capacitors, with the only difference that it can withstand higher voltages, up to 700V, due to the particular design characteristics of this capacitor. When the capacitor is connected into the circuit and it receives a voltage, an electrostatic field is created between the anode and the cathode and this attracts the electrolyte in the form of a liquid. This liquid is then attracted around the anode and increases capacitor’s capacity as well as its lifespan.

EXV477M025S9PAA aluminum electrolytic capacitors are infusing with new technology to offer increased performance efficiency, longevity and reliable system startup performance in all industries. By combining performance and capacity features, this type of capacitors are a great choice for power supply systems and electrical applications.

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