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Introduction To Film Capacitors

A film capacitor (or foil capacitor) is an electrical component used to store electric charge and electrical energy. They are constructed from two metal foils, each with an electrically non-conductive dielectric film which is applied between them. A resistive material, which may be deposited onto the dielectric film, is also added to create the capacitor\'s equivalent series resistance.

Film capacitors can be found in many different forms, including: Axial, Radial, and Snap-in styles, and are made from a multitude of materials. However, they all have similar characteristics: high capacitance, low dissipation factor, resonant properties, and high insulation resistance.

The two most common types of materials used for film capacitors are polyester (PET) and polypropylene (PP). Both of these are polymers materials that can be produced using a variety of manufacturing techniques and can be found in capacitor sizes ranging from 1 pF to 550 µF. Polyester and polypropylene have a very low temperature coefficient of capacitance when compared to other types of capacitors.

B32023B3224K000 Application Field & Working Principle

The B32023B3224K000 film capacitor is a high voltage, radial leaded, snap-in style capacitor manufactured by KEMET. It is designed for automotive applications and general use.

The B32023B3224K000 is a motor start capacitor designed for AC induction motors. It can be used for applications including electric pumps, compressors, and electric air conditioning systems. The capacitor has a working voltage of 150V-250V and a capacitance of 24 µF. It features high insulation resistance, a long life, and low ESR.

The B32023B3224K000 capacitor utilizes a polyester dielectric material which is applied between two metal foils. This construction provides superior characteristics such as long life and high insulation resistance. The capacitor also features a self-healing construction, meaning that if the capacitor becomes damaged, the current will flow through the dielectric material without causing any permanent damage to the capacitor.

The working principle behind a film capacitor is relatively simple. Like all capacitors, it is an energy-storing device. As an alternating current is applied to the capacitor, it stores an electrical charge, which it can then discharge when the current reverses. This allows the capacitor to act as an AC filter, removing transients and other noise from power systems. It can also be used for DC-blocking and DC decoupling.

Conclusion

Film capacitors are an essential component in many different electrical applications, and the B32023B3224K000 is a great example of this. It is a high voltage, radial leaded, snap-in style capacitor suitable for a variety of applications including motor start, DC decoupling, and AC filtering. It also features a polyester dielectric which provides superior performance characteristics such as a long life and high insulation resistance.

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