PEG226KL4270QE1

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Aluminum electrolytic capacitors are widely deployed in many industries, due to their excellent performance and cost-effectiveness. The PEG226KL4270QE1 is one of the most widely used aluminum electrolytic capacitors. It is a radial product with a rated voltage of 25V and a capacitance of 4,700μF. In this article, we shall discuss the application field and working principle of PEG226KL4270QE1.

PEG226KL4270QE1 is mainly applied in general purpose circuits with no special reliability requirements, such as switching power supply, DC-DC converters, electronic regulators, and other power electronic circuits. It may also be used in audio circuits, outputs from high power DC-DC converters, and energy storage for airplanes and vehicles.

The PEG226KL4270QE1 capacitor is constructed with a cylindrical aluminum housing, a printed circuit board, and a protective cap. The aluminum housing is hermetically sealed to form a vacuum, ensuring the environmental durability of the capacitor. The printed circuit board serves as the main component, while the protective cap encloses the whole unit and protects the component from damage. The capacitance value of 4,700μF is obtained through a series of layers of electrolytic anode and cathode foils. The layers are represented by n in the product code, with n being different values based on the required capacitance.

The working principle of PEG226KL4270QE1 is based on storing electrical energy using the electric double layer created by the electrolyte associated with the interfacial layers between the aluminum anode and the cathode foils. This electric double layer is composed of four layers, namely, protons, electrons, dielectric, and electrolytic acid layer. When a voltage of 25V is applied to the junction, the protons and electrons move towards the aluminum anode and cathode and create the electric double layer. The electric field generated between them causes a charge to be stored mechanically, thus allowing the capacitor to be used as an energy storage device.

The capacitor charge is counterbalanced by an electrical equivalent internal resistance, called Equivalent Series Resistance (ESR). This reduces the total impedance of the capacitor, which can lead to a decrease in power dissipation and loss. Additionally, the ESR also helps increased/decreased temperature and ripple current capability.

In conclusion, the PEG226KL4270QE1 is a popular aluminum electrolytic capacitor with a variety of applications. It is characterized by excellent performance, durability and cost-effectiveness. The capacitor is constructed with a hermetically sealed aluminum housing, printed circuit board and a protective cap, while the working principle is based on the electric double layer created by the electrolyte associated with the interfacial layers between the aluminum anode and the cathode foils. This ensures that the capacitor provides reliable energy storage with minimal power dissipation and loss.

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