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Aluminum Electrolytic Capacitors

25YXH470MEFCT78X20 belongs to the category of Aluminum Electrolytic Capacitors, which are mainly composed of aluminum foil, paper, electrolyte, and other parts. Aluminum Electrolytic Capacitors are widely used in power supplies, DC&AC link circuits, bypass and filter circuits, and are also widely used in various electronic circuits.

Aluminum Electrolytic Capacitors have many advantages such as a very large capacitance value, a wide range of operating voltage and temperature, easy to use, and low cost. However, Aluminum Electrolytic Capacitors also have their shortcomings, such as large loss, less working temperature range, possible mechanical and electrical deterioration with time.

Application Field

The 25YXH470MEFCT78X20 Aluminum Electrolytic Capacitor is mainly used in power supply filtering circuits, AC and DC decoupling circuits, electro-acoustic frequency dividers, and audio-frequency crossovers.

In power supply filtering circuits, the capacitor acts as an input capacitor filter. As DC currents pass through the capacitor, some AC currents may appear, and Aluminum Electrolytic Capacitors can effectively suppress the AC component, so that the power supply circuit can output a stable DC current.

In AC and DC decoupling circuits, it is mainly used to reduce the surge voltage in AC circuits and reduce the ripple voltage in DC circuits, so that the operating voltage of the entire circuit is stable. In addition, Aluminum Electrolytic Capacitors are sometimes used in audio frequency dividers as filter capacitors, which can effectively remove high-frequency and low-frequency signals from the circuit, enabling the circuit to accurately output the working frequency signal.

Working Principle

Aluminum Electrolytic Capacitors mainly work by capacitance. The working principle is to use the surface roughness formed by aluminum oxide film on the aluminum foil, and the dielectric body, and the electrolyte, to form a capacitor, and the electrolyte (electrolyte) is the medium for forming the capacitor. When a voltage is applied, the positive and negative electrodes of the electrolyte are polarized for a certain time, forming a surface oxide film, and the surface roughness increases. The larger the increase, the greater the capacitance generated when a voltage is applied. When the capacitor is connected to the circuit, electric energy is exchanged between the two electric fields and stored in the capacitor. The current changes the potential energy stored in the capacitor.

In addition, Aluminum Electrolytic Capacitors have a stable operating temperature range and can effectively reduce the effect of thermal deformation on the circuit, which makes them applicable to many fields.

Conclusion

Aluminum Electrolytic Capacitors are widely used in various fields, and the 25YXH470MEFCT78X20 is mainly used in power supply filtering circuits, AC and DC decoupling circuits, electro-acoustic frequency dividers, and audio-frequency crossovers. With the advantages of low cost, large capacity, and wide temperature range, Aluminum Electrolytic Capacitors can effectively stabilize the performance of the system and reduce the ripple voltage and the surge voltage. The working principle is to use the surface roughness formed by the aluminum oxide film on the aluminum foil and the dielectric body, and the generation of the capacitance is realized by the electrolyte.

Aluminum Electrolytic Capacitors no doubt plays a very important role in the different areas, and its application will be more and more widely used.

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