ALS81C125QT025

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Aluminum electrolytic capacitors are a type of capacitor that uses pure aluminum foil as an anode, etched to increase the surface area, and a chemical oxide layer as the dielectric material between the anode and the cathode. The capacitor’s terminal is connected to the anode. Aluminum electrolytic capacitors are widely used in various fields due to their high capacitance, low equivalent series resistance (ESR), and long life. ALS81C125QT025 is one of the most popular aluminum electrolytic capacitors.

Application Field

ALS81C125QT025 is mainly used in low frequency smoothing, power supply filtering and buffering, frequency tuning, frequency conversion, timing and delay circuits, etc. It is commonly used in the electrical engineering fields, especially in AC power applications. It also has applications in industrial automation, instrumentation, audio, and telecom systems.

Working Principle

The working principle of the ALS81C125QT025 aluminum electrolytic capacitor is based on the electrostatic capacitors. This type of capacitors consists of two electrodes separated by an electrically insulating dielectric layer between them. When connected to a DC voltage source, an electric field is generated between the electrodes. This electric field is capable of storing some energy. The aluminium electrolyte is used as one of the electrodes and an electrolyte paste or liquid is used as the other electrode.

When a current is applied to the electrolyte, positively charged ions travel from the aluminium anode to the electrolyte. This creates a positive charge at the electrolyte side of the dielectric. As a result, a double-layer capacitance is formed. This capacitance is known as the anode-electrolyte capacitance.

The dielectric layer between the two electrodes is very thin. This allows the electrolyte to act as an insulator, reducing the amount of leakage current between the anode and the electrolyte. The amount of current that the capacitor can store is known as its capacitance. This capacitance is expressed in Farads and depends on the size of the electrodes and the dielectric layer.

The anode-electrolyte capacitance is the basis of the working principle of the ALS81C125QT025 aluminum electrolytic capacitor. Since the capacitance increases with the applied voltage, the capacitor can be used to store energy at a higher voltage for a longer time. The capacitor can also be used as a filter to smooth out AC power supply voltage to DC supply, thus providing a more stable and reliable power supply.

Conclusion

In conclusion, the ALS81C125QT025 aluminum electrolytic capacitor is a type of capacitor that uses a thin dielectric layer to store energy. Its capacitance is expressed in Farads and depends on the size of the electrodes and the dielectric layer. It is widely used in low frequency smoothing, digital control circuits, power supply filtering and buffering, frequency tuning, frequency conversion, and timing and delay circuits. This capacitor has a wide range of applications in electrical engineering fields, industrial automation, instrumentation, audio, and telecom systems.

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