SFD44S35K391B

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Film Capacitors

Film capacitors, also known as polyethylene naphthalate (PEN) capacitors, have become increasingly popular in many area of electronic applications due to their superior performance characteristics. In particular, the SFD44S35K391B is a popular model of film capacitor, and is widely employed in many markets due to its versatility and reliability.

Application Field

The SFD44S35K391B is a polypropylene film capacitor designed for use in professional audio applications. This capacitor is often used in power amplifiers, sound cards, pre-amps and other audio devices. It is noted for its excellent power handling, wide-range frequency response and low noise capability.

In addition to its typical professional audio applications, the SFD44S35K391B is also used in automotive applications, such as ignition, seat control systems, remote starters, and other automotive electronics. Additionally, this capacitor model is found in high-frequency switch gear and power supply applications, where its low internal losses and high-pulse surge capability lend themselves to reliability and performance.

Working Principle

The SFD44S35K391B employs a polypropylene film dielectric that is rolled around a thin metal foil electrode and then sealed inside a metalized plastic envelope. This design ensures that the capacitor remains low dissipation, allowing for better high-frequency response and lower noise performance. The films used in film capacitors are high-dielectric constants, meaning that they can store greater amounts of charge relative to other capacitor types.

The design of the SFD44S35K391B also permits the capacitor to operate over an extended range of temperatures, tolerating temperatures from -40 to +105 Celsius. The capacitor also features low leakage, or "dielectric absorption”, enabling it to maintain its charge for long periods of time. This makes it an excellent choice for applications where long-term reliability and performance are required.

Conclusion

The SFD44S35K391B is a popular model of film capacitor designed for use in a wide range of applications from professional audio to automotive electronics. This capacitor is noted for its low dissipation, extended temperature range and low leakage. As a result, it is an excellent choice for those looking to maximize the performance and reliability of their electronic applications.

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