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Film Capacitors

BFC237116154 is a type of film capacitor, which is among the most widely used capacitor type in the market. It is widely used in electrical engineering, telecommunications, and other fields. Common film capacitors are divided into two categories: oil-filled capacitors and machine dielectric capacitors.

Application Field

Film capacitors are mostly used in a wide variety of electronic and electrical equipment, such as audio systems, TV sets, radios, audio amplifiers, and computers. They also have a wide range of applications in telecommunications and power industry. In the telecommunications field, film capacitors are used in microwave radios, satellite antennas, communication equipment, etc. In the power field, it is used for harmonic suppression, transient voltage suppression, reactor filters, AI circuits, motor control, inverter circuits, etc.

Working Principle

Film capacitors are based on the thin plastic film as dielectric layer, sandwiched between two electrodes. Generally, the electrodes are made of aluminum and copper foil. Slicing and vacuum plating technology is used to form electrodes with certain shapes and sizes. Commonly used film capacitors have a compact structure, good insulation performance, and good frequency characteristic. They also have better temperature and voltage coefficient performance than other types of capacitor.

The working principle of the film capacitor is based on the electrical field generated between two electrodes. When a voltage is applied to the capacitor, an electric field is generated between the two electrodes, which compresses the dielectric layer between the electrodes into a thin layer. The electric field intensity is inversely proportional to the thickness of the dielectric, which leads to an increase in capacitance.

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