ALS81A125QT025

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Aluminum Electrolytic Capacitors, such as the ALS81A125QT025, are essential components in the majority of commercial and industrial applications. Used to store and regulate the voltage of electrical circuits, these capacitors have a range of features and uses, depending on their specific design. This article will discuss the application fields and working principle of the ALS81A125QT025.

The ALS81A125QT025 is a round, cylindrical component with a diameter of 8.1mm and a height of 25mm. It has a rated capacitance of 47μF, a rated voltage of 25V, and an insulation resistance of 8000MΩ at 25V, making it suitable for use in applications requiring a moderate current such as power conversion systems and automotive electronics. It also has a long service life with a minimum of 4000 hours at 105°C and meets the requirements of both RoHS and lead-free solder systems.

Aluminum electrolytic capacitors have a wide range of applications, including power supplies, surge protection circuits, and motor control circuits. In these applications, they are often used as filters to suppress electrical noise and in power converter circuits to maintain the stability of output voltage. They are also used in signal processing circuits to allow signals to pass through without distortion and in oscillation circuits to control the frequency of oscillation. In automotive electronics, they are used to suppress current and voltage fluctuations in engine ignition systems and as start-up capacitors in electric vehicles.

In terms of working principle, aluminum electrolytic capacitors are based on three main components: an anode, a dielectric, and a cathode. The dielectric is made from an electrolyte-soaked paper separator, with an aluminum foil as the anode and a wound-aluminum foil or a foil-coated metal layer as the cathode. The anode connects to one of the terminals and the cathode connects to the other terminal. When a voltage is applied to the capacitor, electric current flows through the electrolyte and charges the anode and cathode layers, creating an electric field between them.

As the voltage is increased, electric current is further conducted through the capacitor, out of the anode, and into the cathode. This creates a charge in the capacitor, which is stored between the anode and cathode layers much like a rechargeable battery. When the charge reaches its maximum capacity, current can no longer pass through the capacitor and so it stops conducting electricity and holds its charge until the voltage is removed or reduced.

The ALS81A125QT025 aluminum electrolytic capacitor is a reliable, high-performance component ideal for use in commercial and industrial applications where moderate current is required. Its long service life and good insulation resistance make it suitable for applications such as power conversion systems and motor control circuits, while its RoHS and lead-free solder system compliance make it a great choice for use in automotive electronics.

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