B25856K105K3

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Film capacitors, also called film dielectric capacitor, are used to store electric energy and to create electric fields. The B25856K105K3 is a film capacitor manufactured by EPCOS (Siemens). It is a polypropylene-film-based capacitor designed for use in AC applications up to 250V. It is suitable for AC stability and improved high-frequency characteristics.

The B25856K105K3 is a multi-layer capacitor with two separate, thin polypropylene films as the dielectric material. The layers are connected together in an alternately spaced, lamination structure. This imitates the characteristics of a large capacitor plate and results in a high capacitance value and low than standard series inductance. The capacitor can be wire wound or are connected in an axial format.

The application fields for the B25856K105K3 are broad, with usage including high-efficiency loudspeakers, home entertainment equipment, power supplies, lighting systems, and other audio/visual applications. It is also suitable for motor start and running applications. The capacitor can also be used as a snubber, filter, DC-blocking, and for signal-integrity/EMI noise reduction tasks.

The working principle of a film capacitor is based on the parallel-plate capacitor. Two electrodes, a dielectric material, and terminals, serve as the capacitor\'s main components. When an electric charge is applied to one of the electrodes, it accumulates on the metal foil facing the dielectric material. As the charge builds up, an electric field is created and a voltage is applied between the appropriate terminals. This causes the charge on one plate to oppose the charge on the other, resulting in an electric field and an electrostatic attraction between the two plates.

The material of the capacitor dielectric influences its electrical characteristics, including its capacitance, electrical breakdown voltage, self-healing rate and dielectric losses. The B25856K105K3 uses polypropylene as its dielectric material which provides good electrical breakdown and noise reduction characteristics, in addition to a high dielectric strength. The dielectric also claims excellent temperature humidity and frequency characteristics.

The B25856K105K3 film capacitor offers a wide range of applications due to its superior electrical characteristics. The high capacitance, exceptional electrical breakdown voltage and dielectric strength of this capacitor makes it an ideal choice for many AC applications. It is also well suited for use in audio/visual equipment and frequencies up to 1kHz. It is an ideal capacitor for many AC applications and is particularly recommended for motor start and running, signal integrity and EMI noise reduction tasks.

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