ULD2D120MPD

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Aluminum electrolytic capacitors are prevalent in virtually all modern electronics for a variety of purposes. Their application fields and working principle are essential for understanding their role in a range of electrical and mechanical systems. One such capacitor is the ULD2D120MPD, an aluminum electrolytic capacitor from Panasonic. In this paper, we will discuss the application fields and working principles of the ULD2D120MPD aluminum electrolytic capacitor.

Types of Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are subdivided into two main categories: polarized and non-polarized. Polarized aluminum electrolytic capacitors are designed to carry a current in one direction, and are typically used in applications where voltage regulation is required, such as DC power supplies and audio amplifiers. Non-polarized aluminum electrolytic capacitors are designed to operate in either direction, and are typically used in applications where high capacitance values are needed, such as for power supplies or signal processing.

Polarized and non-polarized capacitors can be further subcategorized according to their design; the two most common types are the axial electrolytic, which consists of two metal tubes mounted at a ninety-degree angle, and the radial electrolytic, which consists of a single metal tube mounted in a circular fashion. The type of aluminum electrolytic capacitor used in a given application will depend on the size, voltage, and current requirements.

Features of the ULD2D120MPD

The ULD2D120MPD is a non-polarized aluminum electrolytic capacitor from Panasonic. It is an axial type capacitor with a rated capacitance of 120μF and a rated voltage of 25V DC. It is constructed with a solid aluminum chip, a steel connector, and an aluminum can, all of which are plated with a corrosion-resistant nickel coating. The ULD2D120MPD has a wide temperature range and is able to operate at temperatures of -40 to +85°C.

Application Fields of the ULD2D120MPD

The ULD2D120MPD aluminum electrolytic capacitor is suitable for applications that require moderate capacitance values and voltages. It is often used in DC power supplies, audio amplifiers, signal filters, radio transmitters and receivers, and controls. The ULD2D120MPD\'s low ESR (equivalent series resistance) makes it ideal for high-frequency applications.

Working Principle of the ULD2D120MPD Aluminum Electrolytic Capacitor

The ULD2D120MPD aluminum electrolytic capacitor operates on a simple yet effective principle. When a voltage is applied across its terminals, an electric field is generated in the dielectric between the two metal plates (anode and cathode). This electric field causes ions (atoms with a net electric charge) to move toward the anode, creating an electric double layer composed of positive and negative ions. This electric double layer forms a capacitance that stores an electrical charge.

When the voltage across the capacitor is removed, the electric double layer collapses and the charge is discharged. The time it takes for the charge to discharge is known as the "leakage current" and is proportional to the capacitor\'s capacitance. This leakage current can be minimized by using a high-quality aluminum electrolytic capacitor such as the ULD2D120MPD.

Conclusion

The ULD2D120MPD aluminum electrolytic capacitor is a non-polarized axial type capacitor designed to operate in applications requiring high capacitance values and low leakage current. The ULD2D120MPD is suitable for use in DC power supplies, audio amplifiers, signal filters, radio transmitters and receivers, and controls. It utilizes an electric double layer formed in the dielectric between its metal plates to store an electrical charge and operate on a simple yet effective principle.

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