ECQ-U2A474MV

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Film capacitors, also known as plastic film capacitors, are capacitors with an insulated plastic film as the dielectric medium. Film capacitors offer a variety of advantages over ceramic and electrolytic capacitors. Their self-healing property and high voltage handling capabilities make them an ideal choice for many power applications. The ECQ-U2A474MV is one such film capacitor.

The ECQ-U2A474MV is a polyethylene-terephthalate (PET)-based, metallized-film capacitor. It is of the ‘exceptional quality’ series, offering a high endurance of 50,000 hours of temperature operation and wide temperature-range of -55 to +125°C. Additionally, it has low ESL and ESR, and a high volumetric efficiency. The working voltage of this series ranges between 250 and 450Vac, with coupling capacitors from 0.22 to 2.2μF.

The ECQ-U2A474MV has a wide range of applications due to its high performance characteristics. It is mainly used in high-end audio equipment and stage lighting systems, such as in the countermeasures of switching power supplies, ripple filters, and relay noise. It is also used for the modulation of signal transistors and in communication devices, from medical equipment to advanced computers. It is widely used in LCD TVs and DVD players, as the high-end switches in these components require greater voltage-handling capabilities. The capacitor is also used for electric auto-instruments, automotive audio systems, security systems, and telephone systems.

The working principle of the ECQ-U2A474MV is relatively simple. The capacitor is composed of a conducting metal substrate that acts as an edge plate for one of the electrodes. On each side, a plastic film is attached to the edge. The films, in turn, serve as one of the capacitive elements. The entire assembly is insulated from external forces with a protective coating. When an AC or a DC voltage is applied across the electrodes, the capacitance of the device increases.

The current then starts to flow to the electrodes and is divided between them in accordance with the potential difference. Since the current flows through the dielectric, it leads to the creation of an electric field between the metal edges and the films. This electric field attracts the films and reduces the gap between them, thus increasing the capacitance of the device. Conversely, when the external voltage is removed, the films are released and the capacitance of the device is reduced.

In conclusion, the ECQ-U2A474MV is a high-performance, metallized-film capacitor that is suitable for a range of applications, from audio and stage lighting equipment to electric auto-instruments and communication devices. Its self-healing property and wide voltage handling capability make it an ideal choice for many power applications. The working principle is simple—the capacitor increases its capacitance when an AC or DC voltage is applied across its electrodes, due to the attraction of the films towards each other.

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