ALF40C271EC400

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Aluminum electrolytic capacitors, also known as aluminum electrolytic capacitors, are capacitors that use an oxide film separated by an electrolyte as a dielectric for energy storage. Compared with other capacitors, aluminum electrolytic capacitors have high capacitance and are widely used in power electronics. ALF40C271EC400 is one of the aluminum electrolytic capacitors from ALF Corporation, which we will discuss in two aspects of its application field and working principle.

Application Field

ALF40C271EC400 is a non-solid tantalum capacitor with a voltage of 4V and a capacitance of 27uF. Because of its small size, it is widely used in circuits with small size and low power consumption requirements. It can be applied to various fields such as DC ripple filter, surge suppression, coupling and coupling. In addition, it also has the advantages of high temperature resistance and long life, and is widely used in high temperature, high circuit switching, and high power pulse filter circuits.

Working Principle

ALF40C271EC400 uses an electrolytic capacitor, which produces a capacitance effect by forming a dielectric oxide film on the surface of an aluminum foil in an electrolyte. During the working process of the capacitor, the positive and negative electrodes of the capacitor are respectively connected with the cathode element and the anode element, and the electrolytic solution acts as an ion bridge between the two. When an AC voltage is applied to the electrodes of the capacitor, the positive and negative charges are exchanged between the two electrodes through the electrolyte in the electric field of the capacitor, and the AC alternating positive and negative charges are superimposed and superimposed, thus forming an AC ripple on the surface of the electrode.

Analyses show that when the Ripple voltage is within its rated range as its working voltage, almost no erosion of the oxide layer will occur. Since some capacitance of the capacitor also exists in the AC electric field of the rated voltage, the capacitor has a combination of the capacitance of the capacitor and the resistance of the oxide film, so the capacitor has the characteristics of Resistance-Capacitance (RC).

When the AC voltage exceeding the rated voltage is applied, oxidation of the oxide film occurs, resulting in a decrease in capacitance and an increase in leakage current. In addition, when the voltage of the electric field is very high, the atom of the oxide film will be broken and the characteristic of the thin film capacitor will be significantly changed, which also affects the normal working process of the aluminum electrolytic capacitor.

Conclusion

In summary, ALF40C271EC400 can be used in many small and low power consumption fields. It is one of Aluminum Electrolytic Capacitors from ALF Corporation. The working principle of ALF40C271EC400 is to use an electrolytic capacitor, which produces a capacitance effect by forming a dielectric oxide film on the surface of an aluminum foil in an electrolyte. If the AC voltage exceeding the rated voltage is applied, oxidation of the oxide film occurs, resulting in a decrease in capacitance and an increase in leakage current.

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