Aluminum Electrolytic Capacitors

Aluminum Electrolytic Capacitors are passive electronic components, among the most popular form of capacitors, used as filters and in blocking and bypass functions. They are area of expertise of many electronic equipment designers and have wide application in RF communications, automotive, industrial or medical applications. In this article, the application field and working principle of UPJ2A3R3MDD will be discussed in details.

Application of UPJ2A3R3MDD

UPJ2A3R3MDD is a radial, non-polarized aluminum electrolytic capacitor with an Angled Electrolytic design. It is specifically designed to be mounted with a round post or through-hole board assembly. UPJ2A3R3MDD offers low equivalent series resistance (ESR) and increased capacitance which makes it suitable for certain application fields. The application fields of UPJ2A3R3MDD include, but are not limited to, the following:

• Switch-mode Power Supply (SMPS)
• DC-DC Converter
• RF Communications
• Voltage Stabilization
• Control Circuits & Switches
• Audio & Video
• High Speed Signal Processing Circuits
• Filtering & Bypassing Power Supplies
• Automotive & Industrial Applications
• Medical Equipment

Working Principle of UPJ2A3R3MDD

Aluminum electrolytic capacitors are mainly composed of an aluminum foil which acts as the anode, a layer of electrolyte which acts both as the dielectric and the electrolytic solution, and a porous dielectric coating. When a potential is applied across the capacitor, an electric field is generated which causes oxide layer formation on the anode. The layer forms when oxygen ions attract to and form a diffuse layer between the aluminum foil and the electrolyte. This is known as anodic oxidation, and it forms a thin oxide film that acts as the dielectric.

The electric field also causes ions from the electrolyte to migrate to the anode. These ions, often a combination of hydroxyl ions, form a highly conductive bond between the anode, the dielectric, and the cathode or negative terminal. This bond enables the electric energy stored in the capacitor to be maintained as long as there is a constant potential.

Because the anode in an aluminum electrolytic capacitor is composed of an oxide film, it has a high leakage conductance that can reduce a capacitor’s long-term electrical stability. However, in the case of UPJ2A3R3MDD, the dielectric coating of UPJ2A30R3MDD provides improved noise reduction efficiency with minimal affect on the capacitance. Therefore, UPJ2A30R3MDD is one of the best choices when it comes to long-term electrical stability.

Conclusion

In summary, UPJ2A3R3MDD has a wide range of application fields and its working principle makes it the perfect choice for long-term electrical stability. As an area of expertise for many electronic equipment designers, UPJ2A3R3MDD aluminum electrolytic capacitors are ideal for automotive, industrial or medical applications.