381LQ181M400H032

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Aluminum electrolytic capacitors, also known as electrolytic capacitors, are a type of capacitor which uses an electrolyte bridges between two layers of aluminum foil electrodes, enabling them to store large amounts of energy, and have a wide range of applications. The specific part number of "381LQ181M400H032" refers to an aluminum electrolytic capacitor, and this article will explain its application and working principles.

Application: Aluminum electrolytic capacitors such as the "381LQ181M400H032" are mainly used for filtering or decoupling electronic components and circuits. They can also be used for bypassing, coupling, or timing applications, where they must resist sudden changes in current or voltage. Moreover, they are also used as noise filters for electric motors, as well as power supplies for phone lines and audio equipment. Aluminum electrolytic capacitors are also used in RFID and wireless networks as voltage regulators.

Working Principle: Aluminum electrolytic capacitors are composed of two layers of aluminum foil with an electrolyte bonded between them. When a voltage is applied to the capacitor, the electrolyte will be polarized, forming a dipole layer on the aluminum foil. This dipole layer creates an electric field between the two layers of aluminum, which stores energy and enables the capacitor to perform its functions. Additionally, the electrolyte also helps to prevent leaks and reduces the risk of corrosion to the aluminum.

The large capacitance of aluminum electrolytic capacitors makes them ideal for high-frequency applications, as they can store and quickly release energy. Moreover, the large dielectric constant of the electrolyte allows them to produce a higher capacitance than many other types of capacitor, such as ceramic capacitors.

The "381LQ181M400H032" capacitor has a capacitance of 181 μF and is rated for a maximum operating voltage of 400 V. It has a temperature coefficient of (-10 - 30) %/°C, and a maximum ripple current of 3.1 A. Its endurance is rated at 1000 h at +105 °C, and its ESR is at 0.062 Ohm. The whole unit measures in at 18 x 36 x 31.2 mm, with a weight of 37.6 g. This makes it ideal for applications that require a higher capacitance in a relatively small package.

In conclusion, aluminum electrolytic capacitors, such as the "381LQ181M400H032", are used in a wide range of applications, from automotive and radio equipment to computers and audio equipment. They are ideal for filtering or decoupling, bypassing, or coupling applications that require a high capacitance in a relatively small package. They are composed of two layers of aluminum foil with an electrolyte bonded between them, which allows them to store large amounts of energy, and gives them a higher capacitance than many other types of capacitor.

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