ESMQ251ELL330MJ20S

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Introduction

Aluminum electrolytic capacitors refer to a type of capacitor with electrolyte as medium and aluminum as its anode. It is a device made of aluminum foil as anode, oxide film as dielectric and electrolyte as cathode. The capacitance of aluminum electrolytic capacitor ranges from 1uf to thousands of farads. In terms of range, its rated capacitance is the highest among capacitors. Due to its big capacitance and low cost, aluminum electrolytic capacitor is the most widely used type of capacitor in the world and can be seen in a variety of applications.

ELEMA251ELL330MJ20S

ELEMA251ELL330MJ20S is one of the components of aluminum electrolytic capacitor. It is fitted with electrolyte and consists of aluminum foil and solid electrolyte. The anode of ELEMA251ELL330MJ20S is made of a laminar aluminum foil that has a large surface area which is a beneficial feature in a capacitor. The dielectric of ELEMA251ELL330MJ20S is made from a thin film of aluminum oxide that acts as the insulator for the electric charge and ensures a vacuum like environment for the capacitor. The cathode of ELEMA251ELL330MJ20S consists of a solid electrolyte solution that aids in forming a dielectric between the anode and the cathode.

Application Field and Working Principle

Aluminum electrolytic capacitors are mainly used in audio, power supplies, filters, transistors, computer and communication products. In audio, they are used as coupling capacitors, phase splitting capacitors and feedback capacitors. They can also be used in switching power supplies, DC-DC power supplies, and in power filters, and can widen the frequency range of the audio signal. In power supplies, these capacitors can be used as smoothing capacitors, 3rd harmonic current filters, and mains energy filters. Also, they can be used as coupling capacitors in transistors.

The working principle of aluminum electrolytic capacitors is also quite simple. When a voltage is applied across the leads of the capacitor, a current will flow through the electrolyte. This current will create an electric field within the capacitor that opposes the applied voltage, thus, causing the capacitor to store electrical energy. This electric field increases the capacitance of the capacitor, thus allowing it to store more energy. However, the electric field also causes a reaction between the electrolyte and the anode which will gradually decrease the capacitance of the capacitor. This reaction is known as polarization.

Conclusion

In conclusion, ELEMA251ELL330MJ20S is one of the components of aluminum electrolytic capacitor and is widely used in audio, power supplies, filters, transistors, computer and communication products. Its anode is made of laminar aluminum foil and its dielectric is made of thin film of aluminum oxide. The working principle of aluminum electrolytic capacitors is also quite simple, and the electric field created within the capacitor increases the capacitance of the capacitor, but also causes a reaction between the electrolyte and the anode which will gradually decrease the capacitance of the capacitor.

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