ESMM451VNN331MQ50T

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors (AECs) are electrochemical energy storage elements commonly used in a wide range of electric circuits. They are reliable capacitors consisting of two aluminum foils, electrolyte, and separator plates, offering exceptionally high capacitance values in a relatively small package. With their excellent long-term stability, they are often used to smooth and filter DC voltage.

The ESMM451VNN331MQ50T is an AEC manufactured by Panasonic, and is designed for DC-link applications in industrial controls, renewable energy systems, down-hole tools, and other electronic systems.

Application Field of the ESMM451VNN331MQ50T

The ESMM451VNN331MQ50T is designed for aggressive applications where capacitors must endure extreme temperature, shock, and vibration environments. It offers an ultra-low-profile construction and a low-impedance design, making it ideal for DC-link applications. Additionally, it provides excellent electrical characteristics with a capacitance range from 200 to 1000μF and a maximum voltage rating of 250V. The combination of these features make it a great choice for power applications in harsh environments.

Working Principle

The basic principle of an AEC is similar to other capacitors. It consists of two metal plates and an electrolyte solution of either catalyzed or non-catalyzed ACM. The capacitance of an AEC is directly proportional to the area of the foils and the thickness of the electrolyte. The plates are separated by the electrolyte and also contained in a casing.

When a voltage is applied across the AEC, the electrolyte solution attracts the positive ions from the negative plate, and the negative ions from the positive plate. This creates an opposite polarization, creating a strong electrostatic field between the capacitor plates. Over time, a layer of insulating oxide is formed on the surface of the plates, which increases the capacitance of the device. The capacitance of an AEC is determined by the surface area of the plates, the electrolyte solution, and the current applied to the terminals.

In the case of the ESMM451VNN331MQ50T, the capacitor is designed with low-impedance characteristics, allowing for less noise and better current handling. Additionally, its ultra-low-profile construction makes it suitable for applications where space and weight are critical.

Conclusion

Aluminum electrolytic capacitors are ideal components for DC-link applications in harsh environments. The ESMM451VNN331MQ50T is a high-performance AEC designed for voltage smoothing and noise filtering. This capacitor is well-suited for power electronics applications, thanks to its low impedance design, excellent electrical characteristics, and ultra-low-profile construction.

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