LAR2G121MELZ30

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Aluminum electrolytic capacitors, like other capacitors, are designed to store energy in an electric field. The LAR2G121MELZ30 capacitor is a type of wet aluminum electrolytic capacitor. It uses a liquid electrolyte, organic solvent, and oil to create a sealed environmental chamber which serves as the dielectric. This dielectric construction is different from standard dry aluminum electrolytic capacitors, which use a solid dielectric.

Characterized by their wide temperature range, high capacitance, and long life, aluminum electrolytic capacitors are some of the most popular capacitors used today in a variety of applications. One of the main advantages of aluminum electrolytic capacitors is their extremely low ESR (equivalent series resistance) and ESL (Equivalent Series Inductance) values due their dielectric construction. The LAR2G121MELZ dual-can capacitor has an impedance value of 10 mOhms and an operating temperature of -55°C to +105°C.

The LAR2G121MELZ30 is most commonly used as a filter capacitor in filtering, high-voltage DC circuits and inverter, converters, and other AC/DC applications. It can be used for input and output decoupling, power supply decoupling, ripple current filtering, surge current suppression, and more. The capacitor has a total capacitance of 10,000 microfarads, a rated voltage of 400V, and a leakage current of 0.5µA.

The working principle of the LAR2G121MELZ30 capacitor can be explained in terms of its construction. The capacitor contains an anode (positive) and a cathode (negative) lead connected to two aluminum plates. Between these two plates is a paper spacer, which acts as a dielectric. An electrolyte, usually an organic solvent, is then introduced into the chamber between the aluminum plates. This organic solvent is then used to facilitate the exchange of electrons between the two plates.

When a voltage is applied, a current flows from the anode to the cathode. This current causes the electrolyte to break down into positively and negatively charged ions, which attract to the plates. As the charge builds, it creates an electric field between the two plates. This electric field then stores energy and acts as a capacitor.

The “MELZ” in the part name suggests that the capacitor is an oil-filled version. Before application of the oil, an aluminum-wire mesh is mounted on top of the two aluminum plates, to prevent shorting. The oil serves to insulate the wire mesh and protect it from environmental damage, while also improving the long-term stability of the capacitor. The oil also increases the capacitor’s maximum operating temperature and improves its heat transfer capabilities.

The LAR2G121MELZ30 is a very popular type of aluminum electrolytic capacitor, used for a variety of applications. Its unique construction and its wide temperature range make it the ideal capacitor for many DC and AC/DC power circuits. With its long-term reliability and low ESR and ESL values, this capacitor can be used in a variety of challenging applications.

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