RL80E821MDN1

Aluminum - Polymer Capacitors

Aluminum-polymer capacitors, or simply polymer capacitors, are a type of capacitors that combine two different materials to provide superior electrical performance and high-temperature stability. They are constructed with an anode comprised of an anodized aluminum foil, and a cathode comprising an electrolytic polymer film that acts as the insulating material. This type of capacitor has several high-performance features which make them suitable for a wide range of applications.

The main benefit of aluminum-polymer capacitors is that they offer superior electrical performance: high capacitance and high voltage rating, low ESR (equivalent series resistance), low dissipation factor, long life and high temperature stability. Additionally, the combination of the electrode and insulation materials increases the capacitance for improved capacitance density and decreased ESR.

The RL80LE821MDN1 is an aluminum-polymer capacitor featuring a larger case diameter (30mm) and a higher voltage rating (150V) compared to conventional aluminum-electrolytic capacitors. It has a low ESR at 100kHz and low DF (dissipation factor) at 1kHz. It is designed for reliable operation in high temperature environments and applications where high capacitance density and long-term stability are desired.

RL80LE821MDN1 capacitors are widely used in a variety of applications ranging from automotive electronics, automotive HVAC systems, industrial power supplies, UPS systems, and more. They are also used in high voltage power supplies, brushless motors, and fuel pumps.

Working Principle

The key working principles of aluminum-polymer capacitors are based on the concept of electrochemical double layer and ion diffusion. When a voltage is applied to the capacitor, electrons flow from the anode to the cathode, leading to the formation of an electric double layer between the electrodes. This electric double layer shapes the polarization of the electrolytic polymer film, resulting in the modulation of the dielectric property of the film and causing a change in capacitance.

In addition, ion diffusion occurs in aluminum-polymer capacitors. Ions (including positive, negative and neutral charges) are drawn toward and diffuse into the electric double layer. These ions cause a shift in the electrical potential of the double layer, resulting in a change in the capacitance of the capacitor.

Conclusion

Overall, aluminum-polymer capacitors offer superior electrical performance, high-temperature stability, and increased safety compared to conventional aluminum-electrolytic capacitors. The RL80LE821MDN1 is an aluminum-polymer capacitor designed to operate reliably in applications with high voltage and high temperature. Its key working principles are based on electrochemical double layer and ion diffusion, allowing for high capacitance density and long-term stability.