B81141C1154M289

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Film Capacitors

A film capacitor is a capacitor that uses a thin plastic film as the dielectric, rather than the more common paper or mica dielectrics. The plastic film, either polyester or polypropylene, is quite thin, thus allowing the plates of the capacitor to be closely spaced, resulting in a higher capacitance relative to its size.

B81141C1154M289 Film Capacitor

The B81141C1154M289 film capacitor is a type of high-precision lead-type film capacitor manufactured by EPCOS. It is mainly used in switched-mode power supplies, signal processing and RF applications. This device is designed with an extended temperature range and an increase in the vibration level.

Application Field

The B81141C1154M289 is suitable for use in various consumer electronic devices including compact disc players, audio amplifiers, radios, and televisions. It is also used to improve the overall performance of capacitively tuned circuits in radio frequency (RF) applications. Additionally, this film capacitor can be used in power supplies, both for AC and DC coupling.

Working Principle

A film capacitor works on the principle of capacitance. There is a certain amount of charge stored in the capacitor\'s plates, which is separated by the thin plastic insulation layer. When DC voltage is applied to the plates, the charge stored is proportional to the applied voltage and serves as the capacitor’s electrical energy storage. The capacitance of the film capacitor is determined by the surface area of the plates and the thickness of the plastic insulation.

Advantages

Some of the advantages of the B81141C1154M289 film capacitor include its high accuracy and reliability, its high dielectric strength, and its very low parasitic ESR. This device also has very low self-inductance and high linearity. Additionally, this type of capacitor has a very low self-resonant frequency, resulting in improved performance in pulse shaping applications. It also offers excellent temperature stability and is resistant to dust and moisture.

Disadvantages

The main disadvantage of this device is its cost, as it is more expensive than other alternatives. Additionally, due to the thin plastic insulation layer, it is potentially more prone to dielectric breakdown. It also has a lower operating temperature than other capacitors.

Conclusion

The B81141C1154M289 film capacitor is a high-precision lead-type device designed for use in a wide variety of consumer electronic devices, power supplies, signal processing and RF applications. It offers excellent performance with its high accuracy, reliability and dielectric strength. However, it is also more expensive than other capacitors and has a lower operating temperature.

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