6.3ZL820MEFCT78X16

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Aluminum electrolytic capacitors, also known as electrolytic capacitors or electrolytic condensers, are often used in electronic circuits. And 6.3ZL820MEFCT78X16 is one of its many models with specified application field and working principle.

In a generic definition, an aluminum electrolytic capacitor consists of two conductive foils separated by a dielectric material in a cylindrical aluminum shell. The anode is a thin aluminum foil etched to form a corrugated pattern for increased surface area, and a thin oxide layer serves as the dielectric. A very thin and uniform layer of wet manganese dioxide is applied to the surface of the anode foil. The oxygen supplied by the manganese dioxide serves as the electrolyte. The capacitor’s cathode is typically a foil roll consisting of a conducting strip and a paper roll soaked in electrolyte, or in some cases, wound with a lower impedance conductive strip.

The 6.3ZL820MEFCT78X16 is an advanced model of aluminum electrolytic capacitors. It features a 30% lower ESR than conventional electrolytic capacitors and is rated to operate from -40°C to +105°C, making it suitable for high temperature Stability and industrial grades. Due to its insulation class of B (105°C/250V), it is widely used in applications such as motor controls, automotive electronics, power supply, and so on.

The 6.3ZL820MEFCT78X16 has a smooth ripple current capability, allowing designers to minimize their passive components and reduce costs. In terms of operating principles, when a DC voltage greater than a certain value is applied on the capacitor, the electrolyte will react with the anode aluminum foil, forming an insulation oxide film. The oxidation reaction can be described as:

Al + 3OH-→ Al2O3 + 3H2O (1)

Under the action of the applied voltage, electrons are generated in the anode dielectric and are attracted to the cathode. The electric field is generated in both directions between the anode and the cathode, making electrons from the cathode move in a circle, thus forming an electric current. At the same time, due to the action of electric field between the parallel plate, a capacitance is formed. This is the principle of aluminum electrolytic capacitors.

In conclusion, the 6.3ZL820MEFCT78X16 is an advanced aluminum electrolytic capacitor with excellent features such as low ESR, high temperature stability, and smooth ripple current capability, making it suitable for various electronic applications such as motor control, automotive electronics, and power supply. Its operating principle involves the forming of an insulation oxide film on the anode aluminum foil by a reacting with the electrolyte, leading to a capacitance formation between the anode and the cathode.

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