BFC233623223

Film Capacitors

Film capacitors, also known as plastic film capacitors, are non-electrolytic capacitors with a polymer film as the dielectric material. This film is usually polypropylene (PP) or polyester (PET), although other polymers materials are sometimes used. Compared to paper and ceramic capacitors, film capacitors are able to handle high AC voltages with the dielectric constant allowing them to remain stable under a large range of temperatures and operating conditions. Film capacitors also offer increased noise reduction, relatively low dielectric absorption, and good electrical stability.

BFC233623223 Application Field and Working Principle

The BFC233623223 film capacitor is a non-polarized polyester capacitor. It is designed for use in various applications from DC blocking for audio to bypassing for input radio frequency amplifiers. The capacitor is made with an insulated, impregnated metallized film wound into a cylindrical plastic case. It is then sealed with epoxy resin to provide insulation and moisture resistance. It provides superior temperature stability, high reliability, high capacitance values, and high energy density.

This capacitor’s design utilizes two metal-film layers cut in the center. This is known as the “sandwich” method, which sandwiches the middle layer consisting of a thin dielectric film between two metal plates. This technique increases the capacitor’s volumetric efficiency and capacitance. When a voltage is applied, an electric field develops between the two plates and an electric current is induced. The electric current then travels through the dielectric film, resulting in a capacitance effect.

The BFC233623223 film capacitor is especially useful for applications that require high capacitance values and high energy density. This type of capacitor is also suitable for applications where moisture resistance and temperature stability are important factors, such as power circuits and electric motor circuits.