UCY2C820MPD

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An aluminium electrolytic capacitor is a type of capacitor which utilizes an electrolyte in combination with a sintered anode containing a high surface area of aluminium foil, the etched surface of which acts as the capacitor’s anode and is then rolled into closed-end form, segregating the electrolyte from the aluminium foil. It has the advantage of large capacitance in a comparatively small volume and is consequentially very common in electronics.

UCY2C820MPD Application Field and Working Principle

UCY2C820MPD is an aluminum electrolytic capacitor, suitable for filters, frequency dividers and timing circuits in wide temperature range, high ripple current and voltage application, etc. It\'s casing made from epoxy resin and uses a non-solvent electrolyte which results in a lower equivalent series resistance (ESR) on equivalent parameters.

The working principle of it is based on a pair of separated aluminum foils, "anode" and "cathode", formed into a cylinder. Both of the aluminum foils are separated by a paper spacer and both the "anode" and "cathode" foils are then etched with separate intricate patterns, to increase the surface areas of aluminium foil and improve their electrical conductivity. Moisture and an electrolyte, an acidic solution, is then injected and allowed to soak into the paper spacer to coat the pitted foil surfaces. When voltage is applied to the anode and cathode, an electrical field will be formed between them, thus forming the capacitor.

The foil’s surface area and its proximity to the electrolyte directly relate to the capacitor’s capacitance value. The amount of electrolyte that can be absorbed by the paper spacer also affects the capacitance value because it will add to the total dielectric material between the two aluminum foils. Moreover, the flatness of the foil surface and the uniformity of the electrolyte between the two foils also affects the capacitance rating.

UCY2C820MPD aluminum electrolytic capacitors suffer from the same drawbacks as other types of aluminum electrolytic capacitors. They are prone to failure in high temperatures, or if exposed to high amounts of electrical current, poor temperature coefficient and poor stability. Additionally, the production of aluminum electrolytic capacitors is labour intensive, leading to the high manufacturing costs associated with this type of capacitor.

Despite their drawbacks, aluminum electrolytic capacitors are a popular choice in electronics applications due to its high capacitance and can be found in almost all types of electrical and electronic devices. The UCY2C820MPD aluminum electrolytic capacitors are especially suitable for filters, frequency dividers and timing circuits as they have high ripple current, high surge voltage, low equivalent series resistance and they could operate in wide temperature range.

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