ECW-FD2J125KB

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Film capacitors are widely used at various stages of electronic circuits due to their excellent performance characteristics. The ECW-FD2J125KB is a type of film capacitor that is indeed quite popular. Here we shall discuss the application field and working principle of the ECW-FD2J125KB.

The ECW-FD2J125KB is a ‘Miniature, Polyethylene-Film, Wet Membrane-Type’ capacitor, which is rated for 125V AC, 2.2uF (microfarad) and DC 500V. It works on the principle of capacitance which states that electric charge accumulates on two conducting surfaces when a voltage is applied across them. This accumulation of electric charge creates an electric field between the conducting surfaces and this is how the charge is stored. In the case of the ECW-FD2J125KB, the two conducting surfaces are made of materials like polyethylene-film, electrolytic paper, and wet-membrane. The construction of these components along with the dielectric ensures that the capacitor has an exceptionally high insulation resistance. As a result, it is suitable for applications that require high dielectric strength.

The ECW-FD2J125KB is known for its high stability and reliability, which makes it very suitable for use in low voltage power supplies. It can also be used in timing circuits and for signal processing in equipment such as TVs, radios, and computers. In addition, this capacitor can be found in the power supplies of printers, scanners, and CCTV cameras. Other key applications include filters, power regulators, alarms, and audio video equipment.

The ECW-FD2J125KB also has the advantage of providing a high capacitance density. This means that a relatively small volume of the capacitor is required to achieve the desired capacitance. Furthermore, this film capacitor is capable of handling AC and DC voltages. As a result, it is suitable for use in AC/DC power supplies, AC/DC motors, and in combination with inductors to create filters and transformers.

The working principle of the ECW-FD2J125KB is based on dielectric absorption. To illustrate, when a dielectric material is exposed to a high voltage it absorbs a certain amount of energy. This energy causes the material to become slightly polarized, and the result is a shift in the electrical properties of the dielectric. The shift in electrical properties causes the capacitance of the dielectric material to decrease. On the other hand, a decrease in voltage results in the material becoming depolarized and the electrical properties of the dielectric to return to their original state.

As its name suggests, the ECW-FD2J125KB is a film capacitor and its performance is determined by the type of dielectric that it is constructed from. Generally, capacitors of this type use Polyethylene (PE) film, which is renowned for its excellent performance in high-voltage applications. Other materials that may be used include Electrolytic Paper (EP) and Wet Membrane (WM). Depending on the task that the capacitor is used for, the construction of the dielectric will be tailored accordingly to provide the desired performance.

In conclusion, the ECW-FD2J125KB film capacitor provides excellent performance in applications where high voltage, stability, and reliability is a prerequisite. Its dielectric is constructed from materials like Polyethylene (PE) film, Electrolytic Paper (EP) and Wet Membrane (WM) to ensure that the desired performance is achieved. Furthermore, this capacitor’s performance is determined by its dielectric absorption, which causes the capacitance to decrease as the voltage is increased.

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