ELXV500ELL221MJ25S

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Aluminum Electrolytic Capacitors: ELXV500ELL221MJ25S Application Field and Working Principle

Aluminum electrolytic capacitors are a type of electrolytic capacitor whose anode layer is composed of aluminum foil with an applied oxide layer serving as the dielectric. These capacitors typically offer a high capacitance value per unit volume with a wide range of capacitance values available. In addition, they have relatively low leakage current and a low cost. Due to their small size and relatively low cost, aluminum electrolytic capacitors are used in a wide range of electronic circuits, from consumer electronics and automobiles to military and aerospace applications.

The ELXV500ELL221MJ25S aluminum electrolytic capacitors are specifically designed for specific applications requiring low profile, high capacitance. These capacitors are surface mountable, allowing them to be used in a wide range of applications and in small devices where space is limited. Furthermore, the ELXV500ELL221MJ25S capacitors have an electrolyte content of 2000µF. This allows for high capacitance within a small footprint.

Working Principle

The working principle of aluminum electrolytic capacitors is based on the fact that the anode layer is composed of a thin layer of aluminum foil with an oxide layer serving as a dielectric. This oxide layer is formed by electrolysis where the electrolyte materials are injected under the aluminum foil. This oxide layer allows positive ions from the electrolyte to form an electrical double layer at the oxide-aluminum interface, forming a charge plate. When a voltage is applied to the capacitor, the positive ions from the electrolyte will move toward the negative terminal, while the negative ions will move towards the positive terminal. This movement of ions is what allows electrons to flow from one electrode to the other, allowing current to flow through the capacitor.

The capacitance of an aluminum electrolytic capacitor depends on the area of the aluminum foil, the thickness of the oxide layer, and the electrolyte chemistry used. The voltage rating of the capacitor is mostly determined by the thickness of the oxide layer. The thicker the oxide layer, the higher the voltage rating of the capacitor. Moreover, the capacitors also feature a large temperature range, which is determined by the electrolyte and the type of foil used.

Conclusion

The ELXV500ELL221MJ25S aluminum electrolytic capacitors are a highly capable product designed for applications that require low profile, high capacitance capacitors. These capacitors offer an electrolyte content of 2000µF, providing a large capacity in a small footprint. The working principle of an aluminum electrolytic capacitor is based on the formation of an electrical double layer at the oxide-aluminum interface. The capacitance and voltage rating of the capacitors are determined by the area of the aluminum foil, the thickness of the oxide layer, and the electrolyte chemistry used.

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