B32520C0225K289

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Film capacitors are a type of capacitor built by coating thin plastic film with metal. Common types of film capacitors include polyester film, polyimide film, polypropylene film, and polystyrene film. The B32520C0225K289 is a specific model of polypropylene film capacitor from EPCOS. It is a radial leaded capacitor with a capacitance of 2.2nF and a voltage rating of 250V DC.

Application Field:

Polypropylene film capacitors, such as the B32520C0225K289, are used for a variety of applications. The high insulation resistance, low dielectric losses, and exceptional stability under varying temperature, moisture, and humidity conditions make them ideal for use in a variety of consumer, industrial, and automotive applications. In the consumer sector, they are often used in audio crossover networks, AC motor start circuits, and for general DC blocking and filtering. In the industrial sector, they are used in switch mode power supplies, energy meters, pulse transformers, and high voltage direct current (HVDC) systems. Finally, in the automotive sector, they are used in vehicular control systems, onboard computers, fuel injection systems, and as isolation capacitors.

Working Principle:

The B32520C0225K289 operates using a combination of electrical and thermal effects. The capacitor consists of two conductive plates held apart by an insulating film, usually polypropylene. The capacitor is charged by connecting it to a source of voltage, which sets up an electric field between the plates. This electric field produces an electric current that passes between the plates and charges the capacitor. The charging current can also cause a small amount of heat to be generated between the plates. As the applied voltage increases, the capacitor builds up more charge and is said to “polarize,” creating an electrostatic (or electric) field between the plates.

The electric field affects the electrical properties of the capacitor, which can be measured in a few ways. The capacitance of the capacitor is measured by the amount of charge stored when a voltage is applied, and is usually expressed in farads (F). The voltage rating of the capacitor is the maximum amount of voltage the capacitor can store without breaking down or creating a short circuit. The insulation resistance of the capacitor is a measure of how well the electric current is contained within the capacitor, and is usually expressed in ohms. The dissipation factor is a measure of how much of the electric energy is lost as heat, and is usually expressed in terms of the ratio of the current flowing in the capacitor to the capacitive current. Finally, the leakage current of the capacitor is a measure of how much charge is lost from the capacitor over time, and is usually expressed in amperes.

These electrical properties allow the B32520C0225K289 to be used in a variety of applications, such as in audio crossover networks, AC motor start circuits, and vehicular control systems. Its high insulation resistance, low dielectric losses, and exceptional stability under varying temperature, moisture, and humidity conditions make it an ideal choice in these applications.

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