381LQ471M400K452

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Aluminum electrolytic capacitors, also known as aluminum electrolytic capacitors, are electrical components that are extensively used to store energy, filter signals, and others. The specific model of aluminum electrolytic capacitor that we will be discussing today is the 381LQ471M400K452. This item is relatively small, with a diameter of 11.9mm and a height of 15.3mm. Let’s take a closer look at its application field and working principle.

Application Fields

The 381LQ471M400K452 is designed for inrush current suppression for small motors in various low-voltage applications, such as circuit boards, motor drives, and others. Inrush currents are short-term spikes of high current during the power-on state that can cause high voltage drops and further motor damage. This capacitor is designed to absorb these short-term high currents, reducing or eliminating the risk of motor damage.

In addition to inrush current suppression, this aluminum electrolytic capacitor can also be used for signal filtering and power supply applications. It can be used to smooth current voltage, clean DC voltage, and others.

Working Principle

Aluminum electrolytic capacitors have an anode and a cathode, both of which are connected to an externally applied voltage. The anode is composed of two parts, one is the dielectric aluminum oxide film and the other is the aluminum foil. The dielectric aluminum oxide film is formed between the anode and cathode as an electric field when a voltage is applied. This creates a capacitance value between the two which is determined by the size of the aluminum oxide film\'s surface area.

The 381LQ471M400K452 aluminum electrolytic capacitor is characterized by the use of high porous carbon-coated copper foil as the cathode. This special feature allows it to have a larger capacitance than other types of aluminum electrolytic capacitors. In addition, this type of capacitor also has a good frequency response, making it a good choice for signal filtering as well as inrush current suppression.

Conclusion

In conclusion, 381LQ471M400K452 aluminum electrolytic capacitor is designed for inrush current suppression for small motors, signal filtering, and power supply applications. The electric field formed between the anode and cathode has a certain capacitance value, determined by the surface area of the aluminum oxide film. In addition, this particular aluminum electrolytic capacitor also has a large capacitance as well as a good frequency response, making it suitable for various applications.

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