CB047G0333JBC

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Film Capacitors

A film capacitor, also known as an AC capacitor or a metallized film capacitor, is an electronic component composed of two cutouts of film – such as plastic, paper, or thin foil – separated by an insulator, typically a paper or plastic dielectric. Its name is derived from the fact that it consists of a thin dielectric layer that is typically made of a film material such as mica, glass, thin paper, or PVC.

The CB047G0333JBC is a film capacitor typically used in power supplies, motor applications, and electrical components with demanding energy-storing needs. It is rated from 5 to 100 microfarads (µF) or greater, and its working frequency extends to 100 kHz. This type of capacitor is a good solution for applications with limited space, as its construction is much smaller than electrolytic and ceramic capacitors.

The CB047G0333JBC has a pair of terminals that connects the two electrodes together. Its terminals can vary in diameter, shape, and material such as tin or silver-plated brass. A plastic sleeve is installed around the terminals to protect them from corrosion and moisture. The CB047G0333JBC also has a dielectric layer consisting of a thin film made of polyester or polypropylene. The film thickness is usually in the micrometer range, making this capacitor extremely lightweight.

Working Principle

Film capacitors work by storing electrical energy within the thin dielectric layer. When the two terminals are connected to a power source, an electric field forms within the dielectric, creating electrostatic charge dipoles. These charge dipoles will attempt to remain polarised, and therefore, electrical energy is stored in the capacitor due to the interaction of the positive and negative charge.

When the voltage across the terminals is removed, the stored energy is discharged from the capacitor. This energy is released very quickly, allowing the capacitor to quickly store and discharge energy. This makes it ideal for high frequency applications, where voltage and current fluctuations must occur very quickly.

Applications

Due to its fast response time, film capacitors are suitable for a wide range of applications where quick charge/discharge cycles are required, such as electrostatic motors, resonant circuits, power supplies, and voltage converters. They are also commonly used in automotive applications to reduce electrical noise, where their good high-frequency filtering properties can be taken advantage of.

Film capacitors also have good high temperature operating capabilities, making them suitable for environments where temperatures reach up to 125°C. This unique combination of features makes them the ideal choice for applications that demand stable, reliable voltage control at high temperatures.

Conclusion

The CB047G0333JBC is a high-performing film capacitor that offers excellent features and performance. Its small size and fast charge/discharge times make it an ideal choice for a wide range of applications, from small-scale electronics to large-scale automotive applications. By leveraging the unique properties of the dielectric material, the CB047G0333JBC can provide reliable, stable voltage control even under harsh temperatures.

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