UVR2E221MRA

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Aluminum electrolytic capacitors are a type of capacitor that is widely used in power electronics and other industries due to their large capacity, excellent ability to withstand high voltages and favourable cost. The UVR2E221MRA is a radial leaded, non-polarized aluminum electrolytic capacitor featuring a long life and ripple current capability. This capacitor is utilized in voltage multiplier circuitry, audio crossovers, power supplies and inverters to name a few.

Aluminum electrolytic capacitors, in general, are composed of an aluminum foil and aluminum oxide dielectric material that is wrapped in a non-conductive sleeve. The anode end consists of the aluminum foil which has the connecting lead attached. The cathode is the aluminum oxide layer that lines the walls of the sleeve. The two ends are separated by the electrolyte, which acts as an insulator while also maintaining the integrity of the oxide layer. The oxide layer’s job is to store the electrons, allowing for a potential difference within the capacitor.

The UVR2E221MRA is a modern electrolytic capacitor designed to operate up to a 25Vdc. Its capacitor range is between 220uF to 1000uF, and its rated ripple current is 240mA. Its rated leakage current at 20°C is 3µA; its maximum temperature range is up to 105°C; and its high reliability makes it suitable for a wide range of applications.

This electrolytic capacitor is mainly used in power supplies, audio crossover circuits, voltage multiplier circuits, and more. It is used in power supplies because of its large capacitance; it is able to reduce the energy loss caused by long distance power transmission or switching. It is also used in audio crossover circuits because of its precise time delay characteristics and excellent characteristics in charged energy storage. Additionally, this circuit is also used in inverters, voltage multipliers, and other electronic circuits due to its wide capacitance range.

The working principle of the UVR2E221MRA is based on the fundamental operation of an electrolytic capacitor. The anode and cathode ends contain aluminum foil and aluminum oxide dielectric material. When a positive voltage is applied to the anode side, the electrons on the anode side will be pushed into the dielectric material. As this occurs, the electrons on the cathode side are drawn in as well, producing a potential difference.

The difference in the electrical potential between the two ends creates an electric field. This electric field strengthens as more electrons are forced through the dielectric, until a certain point where the electric field will no longer increase. At this point, the capacitor is said to be in a “saturated” state and the capacitance is at its maximum.

The UVR2E221MRA is a reliable and cost effective aluminum electrolytic capacitor used in a range of applications. It is characterized by its long life, ripple current capability, and wide capacitance range. With its excellent operating characteristics, it is suitable for use in voltage multiplier circuits, audio crossovers, power supplies, and inverters.

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