APXA100ARA100MD55G

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Aluminum - Polymer Capacitors

An aluminum-polymer capacitor, commonly referred to as an APXA100ARA100MD55G, is a type of capacitor that uses aluminum foil as the anode material and one or more layers of polymeric film as the dielectric insulation. As a dual-anode capacitor, the APXA100ARA100MD55G combines both aluminum and polymer to provide superior capacitance while delivering low ESR or equivalent series resistance values and high ripple current capability.

Application Fields of APXA100ARA100MD55G

Compared to traditional aluminum electrolytic capacitors, the increased capacitance and superior characteristics of the APXA100ARA100MD55G make it suitable for applications that require capacitor technologies that need to operate at higher temperatures and higher voltage ratings. Common use cases include automotive electronics, power supplies, lighting, battery powered devices and general purpose power conversion.

Furthermore, with its small size and light weight, APXA100ARA100MD55G capacitors provide an incredibly low effective series resistance (ESR) for use in switching regulators and other high current applications. In DC-DC converters, the polymer increases the reliability and durability of the capacitors, making them capable of withstanding extreme temperatures. Additionally, the robustness of the polymer allows the capacitor to be used in large current applications.

Working Principle of APXA100ARA100MD55G

Aluminum-polymer capacitors are constructed using an anode of aluminum foil and a cathode of polymer film, both coated with a conducting electrolyte material. The anode and cathode layers are separated by the electrolyte and when connected to an electric current, the opposite charged ions migrate through the electrolyte, creating an electrical field between the anode and cathode. This field is strong enough to create an electric charge.

The capacitance of the APXA100ARA100MD55G capacitor is determined by the amount of surface area of the anode, the thickness of the electrolyte, and the distance between the anode and cathode. Capacitors with higher capacitances are typically constructed with a larger surface area, thicker electrolyte layer, and greater distance between the anode and cathode.

Overall, aluminum-polymer capacitors provide higher capacitance and lower ESR compared to traditional aluminum electrolytic capacitors and are thus an ideal choice for high voltage, high temperature, and high current applications. The APXA100ARA100MD55G is a popular choice for automotive electronics, power supplies, lighting, battery powered devices and general purpose power conversion.

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