LGM2W181MELA25

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Aluminum electrolytic capacitors (also known as “Alcaps” for short) are one of the most popular types of capacitors used in electronic circuits. Their main advantage is their relatively large capacitance in a relatively small package size. They are also relatively low cost and have good overall capacitor performance.

The LGM2W181MELA25 (hereafter referred to as LGM2W) is a type of aluminum electrolytic capacitor. It has a maximum operating temperature of 105°C, a capacitance tolerance of -20%, and a rated capacitance of 1800uF at 25V. The LGM2W is available in several case sizes, from 12.5mm to 20mm, making it suitable for use in a variety of applications. The maximum leakage current is 3.00µA.

Application Field

Aluminum electrolytic capacitors like LGM2W are used in multiple applications ranging from automotive to home electronics. The LGM2W is commonly used for power supply filtering, energy storage, and DC blocking. Thanks to its high capacitance and long life, it can also be used for resonant circuits, and suppression and smoothing applications. This makes them useful for automotive switched mode power supplies (SMPS) and filter circuits for communication equipment.

Principle of Operation

The LGM2W is an aluminum electrolytic capacitor constructed from an anode made of aluminum foil, an electrolytic capacitor dielectric layer, and a cathode made of aluminum oxide. The anode has multiple layers of oxide films formed by self etching. When voltage is applied to the capacitor, the electrons flow from the anode to the cathode, and the aluminum oxide layer behaves like a dielectric material.

The oxide layer continues to increase in thickness as electrons are passed between the anode and the cathode. This in turn increases the capacitance of the capacitor. The capacitance value and leakage current are the most important parameters that determine the performance of the capacitor. The failure rate of aluminum electrolytic capacitors increases with time, so they should not be used for high-reliability applications.

Conclusion

The LGM2W181MELA25 is an aluminum electrolytic capacitor that offers a variety of applications ranging from automotive to home electronics. Its high capacitance and long life make it an ideal choice for power supply filtering, energy storage, and DC blocking, as well as for resonant, suppression and smoothing applications. In order to ensure reliable operation, the capacitors should be inspected regularly and replaced when necessary.

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