25MXC18000MEFC25X40

Aluminum Electrolytic Capacitors are one of the most commonly used types of capacitors today. The 25MXC18000MEFC25X40 is one of the many types of capacitors that belong to this family. This article will explore the application field and working principle of the 25MXC18000MEFC25X40 capacitor.

What is an Aluminum Electrolytic Capacitor?

An aluminum electrolytic capacitor is a type of electrolytic capacitor that utilizes an electrolyte of aluminum oxide in its construction. These capacitors are typically polarised and are characterized by their relatively high capacitance per unit volume compared to other types of capacitors. These capacitors can be made in different sizes and voltages, each with different capacitance values.

Application Field

The 25MXC18000MEFC25X40 capacitor is a high-voltage, screw-terminal, alumina-film capacitor. It has a capacitance of 18000 µF and a maximum voltage rating of 25 V. It is used in a wide variety of applications, including power supplies, motor drives, telecommunications, lighting, and other consumer electronics. These capacitors offer excellent performance in low-voltage circuits, making them ideal for low noise applications.

Construction and Properties

The 25MXC18000MEFC25X40 capacitor consists of two aluminum plates separated by an electrolytic oxide film. This oxide film, along with the aluminum plates, form the basic structure of the capacitor. This type of capacitor is constructed with an anode and a cathode, with the anode being negative and the cathode being positive. The aluminum electrolyte is a conductive oxide film that facilitates the flow of electrons from one plate to the other. The oxide film also acts as an insulator, preventing the flow of electric current between the two plates.

Because of the high capacitance value, this type of capacitor is well suited for high-frequency applications and, due to its low equivalent series resistance (ERS) and low equivalent series inductance (ESL), it is also suitable for applications involving high-frequency transients. The 25MXC18000MEFC25X40 capacitor has a high rated temperature range between -55°C and +85°C.

Working Principle

The 25MXC18000MEFC25X40 capacitor works through the principle of electric double layer capacitance (EDLC). When voltage is applied to the two aluminum plates, electrons from the negative anode plate are attracted to the positive cathode plate, causing the formation of a charge layer between the two plates. This charge layer is known as the electric double layer. The higher the voltage applied, the higher the capacitance value. The electric double layer also acts as an insulator, preventing current from flowing between the two plates. As the voltage is maintained, the electric double layer is maintained as well, ensuring long-term reliability.

Conclusion

The 25MXC18000MEFC25X40 aluminum electrolytic capacitor is a reliable and versatile component designed for a variety of applications. It is constructed with an anode and a cathode, and works through the principle of electric double layer capacitance. Its high rated temperature range and low ERS and ESL make it suitable for use in high-frequency applications.