B32656S8255K563

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Film Capacitors

A film capacitor, also known as a plastic film capacitor, is an electronic component composed of two metal plates separated by a dielectric film. The dielectric film used in film capacitor can be made of various materials, including polypropylene (PP), polyester (PET), polystyrene (PS), conjugated polypropylene (CPP), polyphenylene sulfide (PPS) or poly amide (PA). The ability of the film capacitor to store electrical charge, make them especially useful in applications such as filtering and decoupling.

B32656S8255K563 Application Field and Working Principle

Film capacitors like B32656S8255K563 are a kind of metallized film capacitors. They are widely used in the application with higher frequency such as AC filter, DC-Link, signal oscillation, interference suppression, power supply and measurement equipment. These capacitors are especially designed for high inrush current, PFC application and DC link. Film capacitors also displays excellent electrical properties, such as loss tangent, current and voltage strength.

The traditional construction of film capacitors like B32656S8255K563 consists of metalized polypropylene film with 6mm or 7mm diameter. The capacitance values of these capacitors are available from 27pF to 1100pF with voltage range from 250V AC to 630V AC. The capacitors also use self-healing property, which involves re-deposition of the evaporated metal onto the surfaces of the electrodes, thus restoring the originally designed capacitance and voltage strength. They also feature up to 2000 cycles and short circuit proofing.

The components of these film capacitors use high-frequency-squared voltage, which prevents them from self-heating and overheating. The capacitors also feature very low DC leakage current of 20mA or less in 100 days. Moreover, they come with additional features like endurance from 500V AC to 2000V AC, insulation resistance of 500VDC, and self-exitation of the voltage up to 1000V AC.

The working principle of B32656S8255K563 involves an insulation layer, a dielectric layer and a conductive layer. The insulation layer separates the electrodes, ensuring a defined distance between them. An electric field is also created between the electrodes. The dielectric layer functions as the barrier for electrons, which prevents them from passing through the electrode surface. The conductive layer increases the capacitance by providing a higher current flow, and also increases the voltage handling capacity of the capacitor.

B32656S8255K563 film capacitors are widely used for AC and DC filter in the practical application. They displays features like high inrush current capability, high dielectric breakdown endurance, strong anti-overload capacity an high current loading capacity. These characteristics make them especially suitable for power supplies applications which require higher efficiency and larger power.

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