400CFX47MEFC16X31.5

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Aluminum electrolytic capacitors are widely used in electronic products and switching power supplies as noise-filtering capacitors and energy storage devices due to their low cost, small size, low equivalent series resistance (ESR) and large capacity. The 400CFX47MEFC16X31.5 is a type of aluminum electrolytic capacitors, which is commonly found in modern electronic products. In this article, we will be introducing its application field and working principle.

Application Field

The 400CFX47MEFC16X31.5 is a surface-mount aluminum electrolytic capacitor that applies to the industrial control, instrumentation, and communication fields. It is a polarized device and should be connected in the correct direction; otherwise, it may cause permanent damage. Due to its small size, it can be used in space-constrained applications. In addition, it has a very good temperature coefficient, which makes it suitable for temperature-sensitive applications such as power supplies for computers and servers.

Working Principle

The 400CFX47MEFC16X31.5 is basically an aluminum electrolytic capacitor, which is composed of two opposite electrodes which are made of aluminum foil and are partially immersed in a liquid or solid electrolyte. The aluminum foil is first oxidized, forming an insulating layer of aluminum oxide on the surface of the foil. Then workers lay a thin insulating paper between the aluminum foil and the electrolyte, and then put them into the aluminum container. The electrolyte is a liquid which contains polar molecules with positive and negative ions. When the capacitor is connected to the power supply, the positive charge moves to the negative electrode and the negative charge to the positive electrode.

The electric field created by the charges attracts and bonds with the positive and negative ions in the electrolyte, forming an electric double layer, consisting of two layers of charge located at the interface between the two electrodes and the electrolyte. This double layer is a capacitor in its own right, and it is the source of the capacitance of the aluminum electrolytic capacitor. The capacitor also has a higher than normal dielectric strength due to the thin layer of dielectric on the surface of the electrodes which prevents arcing.

In conclusion, the 400CFX47MEFC16X31.5 aluminum electrolytic capacitor is mainly used in industrial control, instrumentation and communication fields as it provides reliable, high-quality performances in temperature-sensitive applications. It features a very low ESR and large capacity despite its small size. Its working principle can be explained as the electric double layer which is formed between the two opposite electrodes and the electrolyte.

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