JS181755-AA

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Film Capacitors

Film capacitors are made from thin film dielectrics such as polyester, film/foil, polycarbonate, PTFE, polypropylene, polystyrene, ceramic, and polyethylene. Although the specific construction of film capacitors can vary significantly depending on the nature of the application they’re used, their basic operation remains essentially the same.

A film capacitor has two metallic plates which have been separated by a thin dielectric material. Electric fields of opposite polarity form on each plate and across the dielectric material in-between them. As current flows, the electric fields exert a force on each other that increases the dielectric strength of the film.

The JS181755-AA application field is a film capacitor designed to help protect the components of AC motors, AC power supplies, power tools, short wave radio antenna, and other electrical applications. The capacitance value of this capacitor is 0.0047 uF and it is rated for a voltage of 200VAC. Its construction consists of two very thin metal plates that are separated by a thin film dielectric material. This construction provides the capacitor with superior dielectric characteristics and allows it to impart a high degree of voltage breakdown protection.

When AC voltage is applied across the plates of the JS181755-AA film capacitor, the electric field created across the plates is constantly changing its sign and amplitude. This rapid change in voltages causes an induced current to flow through the capacitor which opposes the flow of current. The electric field created by this induced current helps to protect the components downstream from the capacitor, by suppressing the flow of electric currents that are harmful to the components.

JS181755-AA film capacitors also have excellent temperature stability and self-healing properties. A self-healing capacitor is one that can easily repair any damage caused by a high energy surge or voltage spike, by shifting its shape or composition in order to dissipate the extra energy. This prevents the capacitor from failing and ensures that the components downstream are protected from unwanted electric currents.

Due to its superior dielectric properties and self-healing capabilities, the JS181755-AA application field film capacitor is an ideal choice for many AC motor and power supply designs. It is highly reliable, easy to install, and can provide reliable voltage breakdown protection for a variety of AC and communication applications.

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