Aluminum – Polymer Capacitors: RE50E561MDN1KX application field and working principle

Aluminum – polymer capacitors are a type of electrolytic capacitor which provides many advantages over traditional electrolytic capacitors. They are relatively new and gaining appeal over traditional aluminum electrolytic capacitors. The RE50E561MDN1KX is a popular aluminum – polymer capacitor developed and manufactured by Murata. Here, we explain the application and working principle of the RE50E561MDN1KX.

Applications of RE50E561MDN1KX aluminum – polymer capacitors

RE50E561MDN1KX aluminum – polymer capacitors are mainly used in applications such as power supplies and low-noise circuits. Being non-polarized, they are suitable for all-round use. This capacitor is a popular choice as its capacitance is higher than that of conventional aluminum electrolytic capacitors. Additionally, it features features a self-healing film construction, which means that any short-circuit breakdowns are healed almost instantly.

RE50E561MDN1KX aluminum – polymer capacitors also offer some additional advantages. It has a low ESR (equivalent series resistance), which gives it high ripple current capability; thus it is suitable for high frequency use, such as in filters, clock supplies, and various power-stabilizing circuits.

Working principle of RE50E561MDN1KX

In comparison to traditional aluminum electrolytic capacitors, RE50E561MDN1KX aluminum – polymer capacitors have a rather different working principle. It basically consists of double layers of aluminum oxide, sandwiched between two aluminum foils. This makes it an electrolyte-free capacitor, ruling out the need for a liquid electrolyte.

An electric field is established between the two aluminum foils when a voltage is applied, and this electric field polarizes the aluminum oxide in the middle. Attractive forces are generated because of this polarization in the aluminum oxide layers, and these forces act as the dielectric between the aluminum foils creating an electric capacitance. The capacitance value is regulated by the thickness of the aluminum oxide layers.

Summary

The RE50E561MDN1KX aluminum – polymer capacitor is a popular type of electrolytic capacitor developed by Murata. It is mainly used in power supplies and low-noise circuits, and features a self-healing mode, high capacitance, and good ripple current capability. The working principle of the RE50E561MDN1KX is based on double layers of aluminum oxide, sandwiched between two aluminum foils. The attractive forces created between the layers of aluminum oxide create the electric capacitance.