AFK477M80R44VT-F

Aluminum electrolytic capacitors, also known as aluminum electrolytic capacitors, use two layers of aluminum plates as electrodes and an electrolyte insulating paper dielectric. Its structure can be classified into axial type, SMD surface-mount type, snap type and radial type. AFK477M80R44VT-F aluminum electrolytic capacitors are typically axial, and are characterized by their flat, oval-shaped case coupled to two tin-platted leads of machine socket pins.

Application Field

AFK477M80R44VT-F aluminum electrolytic capacitors are widely used in switching power supplies, CRT display circuits, horizontal output and motor control circuits. They are also used as filter capacitors in the resonant circuit and snubber circuits of the AC part because of their stable performance. In addition, they are also suitable for the decoupling of dynamic loads in low-frequency bypass circuits, soft-start circuit and high frequency oscillation circuit.

Working Principle

Aluminum electrolytic capacitor works by using two exterior electrodes in contact with an electrolytic solution. One of the electrodes is made from aluminum foil and is etched in an impregnation process similar to that of tantalum electrolytic capacitors. The other electrode is formed by the addition of a metal oxide anode, and a conductive material is used to form a capacitor cell with a dielectric layer formed on the oxide.

As current flows through the capacitor, a charge is deposited onto the oxide layer, creating a strong electric field between the plates and increasing the capacitance of the capacitor. Because the anode reacts to the electric field, the capacitance increases exponentially as the applied voltage increases. The higher the voltage, the higher the capacitance. The capacitance of aluminum electrolytic capacitor is extremely stable, so they are ideal for use in signal filtering circuits.

When the electric field is removed, the capacitor gradually returns to its uncharged state, and the deposited electrons are reabsorbed by the oxide. This process of charge/discharge creates a current leak at the surface of the anode, reducing the effective capacitance of the capacitor until all of the electrons have been reabsorbed, at which point the capacitor is said to be discharged.

Conclusion

In conclusion, AFK477M80R44VT-F aluminum electrolytic capacitors are mainly used in switching power supplies, CRT display circuits, horizontal output and motor control circuits. They are characterized by their flat, oval-shaped case coupled to two tin-platted leads of machine socket pins. Their working principle is based on two exterior electrodes in contact with an electrolytic solution. As current flows through the capacitor, a charge is deposited onto the oxide layer, creating a strong electric field between the plates and increasing the capacitance of the capacitor.