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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are polarized and have an immediate self-discharging ability. They are often used in various kinds of electrical circuits, such as radios, televisions, and computers, to store as well as help release electrical energy. The LNUN7681MSEFBB is a common type among these capacitors, as it is particularly suitable for applications that require a very small size and a low profile.

Application Field

LNUN7681MSEFBB aluminum electrolytic capacitors are used for filtering, energy storage, as well as blocking purposes in a variety of consumer and industrial electronics. Because of their size and low profile, they are most often seen in areas within tight places, such as the interior of a PC board, which allows for a greater number of signals to be packed into a smaller space. Common applications of LNUN7681MSEFBB include decoupling capacitors, hybrid (or transmission line) filter circuits, pulse triggering circuits, and motor starting applications.

Working Principle

At its basic level, an electrolytic capacitor is made up of two aluminum foils that are separated by a spacer (a layer of material which is normally a paper impregnated with an electrolyte). The positive and negative terminals of the capacitor are connected to each of the two metal plates. The positive side usually has a higher capacitance than the negative side due to the presence of the electrolyte dielectric. The resulting capacitance is the sum of the capacitances of the components.

The amount of capacitance supplied by an electrolytic can generally be easily increased when compared to other types of capacitors by increasing the surface area of the aluminum plates. This is accomplished by winding the foil around a dielectric material and applying voltage, causing the metal layers to polarize and forming an oxide layer. This oxide layer is called the dielectric and it prevents any unwanted electrical discharge that could short the circuit.

The LNUN7681MSEFBB capacitor utilizes a chemi-con/manganese dioxide electrolyte, allowing for better performance than those using a less capable electrolyte, such as tantalum. The capacitance of the LNUN7681MSEFBB is marked on the side, and it is able to withstand higher temperatures when compared to other types. They are also much smaller in size, allowing them to fit within tight places in a smaller number of components.

Conclusion

The LNUN7681MSEFBB aluminum electrolytic capacitor is a compact and reliable component with a high-voltage rating that makes it suitable for several electronic applications in a variety of industries. Due to its relatively small size and low profile, it is able to fit in tight places without using many components. It is also less susceptible to thermal changes than other capacitors due to its chemi-con/manganese dioxide electrolyte, making it a reliable and efficient choice for many industrial and consumer electronic applications.

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