ALS70A105QW025

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Aluminum Electrolytic Capacitors (AECs) are a type of capacitor with wide range of applications from regulating voltage supply to providing spare charge for peak current surges, making them an ideal choice for many electronic applications. The AEC model ALS70A105QW025 is a radial-leaded capacitor manufactured by AVX/Kyocera Corporation with capacitance range from 105μF to 25V. It is designed to provide reliable performance and long life in compact size. This article will discuss the application fields and working principle of this specific AEC component.

AEC capacitors are widely used in switch mode power supplies (SMPS), motor drives and various power related products. The ALS70A105QW025 model is suitable for DC-link, DC snubber in motor drives, AC filter, lamp timer, power board, and any circuits requiring high capacitance and low loss. Its excellent features include high temperature performance and high ripple current of up to 4.75A, and its low temperature stability ensures a long lifetime of up to 2000 hours. In addition, the low essential equivalent series resistance (ESR) allows for utilization in stringent power supply designs.

At the heart of the AEC capacitor is the electrolyte. It consists of a radial-type anode and cathode, and aluminum foil is usually used for the anode. The anode is rolled and formed to provide higher capacitance per unit area. The electrolyte used is mainly an etchant made up of a solution of borax and ammonium bifluoride. Through electrolysis, a thin oxide film is formed on the anode surface, which acts as the dielectric in the capacitor. This dielectric has an excellent capacitance/voltage ratio and high insulation resistance. The capacitor is then sealed, and the leads are placed at the bottom and top.

In operation, a voltage is applied across the two terminals of the capacitor, creating an electric field between the anode and cathode. The electrolyte that fills the gap between the two metal plates conducts electric current, and charges up the capacitor. The magnitude of the charge is directly proportional to the voltage applied to the capacitor, and when the capacitor is fully charged, it stores energy. This energy is then used to supply the necessary current during times of peak demand, or during periods of system instability.

The ALS70A105QW025 is well suited for various applications, particularly those with low frequency and high voltage, and its excellent capacitance/voltage ratio is ideal for many designs. This AEC capacitor is also highly reliable, and its construction ensures long life and stable operation. In conclusion, the ALS70A105QW025 aluminum electrolytic capacitor is an optimal choice for many power applications.

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