UMW0G471MDD

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors offer high values of capacitance typically in a compact form and are available in various types. Primarily they are used in power supply applications where they offer good ripple current handling capabilities. They are also used as energy storage devices in frequency converters, start-stop controls and soft starters. As aluminum electrolytics are generally voltage rated they are not suitable for use in high frequency switching applications.

One particular type within the aluminum electrolytic family is the UMW0G471MDD, an ultra-high capacitance type, designed for applications where high ripple current handling in a small footprint is required. Operationally it can withstand high ripple currents up to 20 Arms and can have a capacitance value of 100µF. This class of capacitor is usually used as a smoothing capacitor in DC applications, often with significant currents in double waveforms. It is designed for use in applications such as in power supplies, switching power supplies, automation and medical equipment.

The construction of the UMW0G471MDD is based upon its high-value capacitance within a small footprint, consisting of a sintered anode made of aluminum and manganese dioxide and a dielectric consisting of aluminum oxide. The anode has then been wound with a separator and two rolled-up films, one for each terminal, and potted in epoxy resin. The construction of this capacitor enables it to provide a very low impedance compared to other capacitors, allowing it to maintain a solid voltage range during high ripple current conditions.

In terms of its working principle, it utilizes the idea of a polarization of electrical charges on different surfaces. It works by storing electrical energy, or charge, on an insulated metal surface (the anode), separated by a non-conducting material with a high electrical resistance (the oxide) from another positive charge on the opposite plate (the cathode). When a voltage is applied to these surfaces, an electric field forms between them, promoting the flow of electrons from the anode to the cathode thus creating a current.

The current of the UMW0G471MDD then passes from the capacitor through whatever other equipment is connected, providing useful power when needed or diverting it as necessary. The amount of energy that is able to be stored, and therefore the power that is generated, is determined by the size of the capacitor and its capacitance value.

Overall, the UMW0G471MDD is a highly effective aluminum electrolytic capacitor are ideal for applications requiring very high ripple currents in a small form factor. With the ability to handle currents up to 20 Arms and a high capacitance value of 100µF, it is ideal for power supplies, switching power supplies, automation and medical equipment.

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