UVZ1J221MPH

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Aluminum electrolytic capacitors are essential components in a wide range of electronic systems. They offer a combination of high capacitance and low ESR characteristics which combine to make them the ideal choice for use in many DC and AC power-handling applications. This article will look at the UVZ1J221MPH particularly, its application field and its working principles.

The UVZ1J221MPH is an aluminum electrolytic capacitor, offering a capacitance of 220µF and rated voltage of 25V. Thanks to its high capacitance, low ESR characteristics and high temperature range (from -40°C to +85°C) it makes an ideal choice in power-handling applications. It is available in two types – canned (standard terminal types) and snap-in (screw terminal type) packages.

The UVZ1J221MPH is especially suitable for applications where high-ripple current and thermal stress are expected. Its low losses even at high ripple frequencies mean it can be used in high-speed switching power supplies, general purpose signal processing and switch-mode power supplies. It can also be used for smoothing, storage and filtering functions in power supplies, motor drives, telecommunication systems and power transmitters.

The working principle of the UVZ1J221MPH is based on a combination of two physical phenomena – electrical double layer effect and oxide film effect. This combination grants the capacitor a great deal of stability, a long life-span and its low ESR characteristics.

The electrical double layer effect works by creating two separate layers on the capacitor’s aluminum foil anodes – a positive layer and a negative one. The positive layer, which is positively charged, adheres to the anodic layer. The negative layer, which is negatively charged, attaches itself to the external surface of the anodic layer. This two-layer system creates an electric double layer, and allows the electrons to move freely in both directions between the two layers, thus creating the stable electrical field inside the capacitor.

The oxide film effect describes how aluminum oxide is formed when it is exposed to air and/or water vapors. This oxide located on the external surface of the aluminum foil acts as a perfect insulator, thus creating a barrier between the anodic layer and the electrolytic solution. This barrier prevents the lack of electrons due to material corrosion, and it also grant the capacitor its good self-healing characteristics.

In conclusion, the UVZ1J221MPH is an ideal choice for power-handling applications mainly due to its high capacitance, low ESR and temperature ratings. Its combination of electrical double layer and oxide film effects are what give the capacitor its capability to maintain stability even in extreme climates, and also grant it a long life-span.

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