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Aluminum electrolytic capacitors

Aluminum electrolytic capacitors are polarized capacitors, which use a chemical electrolytic action by immersing an anode aluminum foil and a paper separator soaked in an electrolyte solution, to gain capacitance thanks to a thin layer of oxide on the foil. They are more cost efficient than other capacitors for higher capacitance values.

SMG63VB821M20SLL

The SMG63VB821M20SLL aluminum electrolytic capacitor is a 20mm L ±20% radial through-hole mount type designed for applications which are sensitive to high temperatures, having an operating temperature range of -55°C to +125°C. These capacitors are best suited for applications within the industrial, automotive, domestic and military areas, as well as other demanding operations.

Application field

SMG63VB821M20SLL capacitors are commonly used in a variety of applications, such as DC blocking, cross-talk prevention, more efficient power transmission, module power applications, high-temperature motor control systems, electric heating, welding, and some heat-sensitive instrumentation. Additionally, these capacitors are used in automotive energy systems and in computers, cell phones, digital video reconders, among other electronic devices requiring high performance and long lifetime.

Working Principle

The SOM63VB821M20SLL aluminum electrolytic capacitor works on the following concept: once the capacitor is charged, an electric field builds up between the anode and the cathode, forming an electric double-layer across the electrolyte. The capacitor achieves this by having the anode material treated with electrical oxide, which allows the negative charge to accumulates on the anode. This is important to getting the capacitance value and how it depends on the material of the anode.

The electrolyte sandwiched between the anode and the cathode provides for the electric current flow within the capacitor. When the capacitor is saturated, the electric field across the dielectric reduces and the charge stored in the capacitor is released. This process is called electrolytic conduction. It enables the capacitor to store much more electric charge than would be possible with a regular ceramic capacitor.

Additionally, the SMG63VB821M20SLL capacitor has a low leakage, decreasing leakage current and increasing product lifespan. This feature makes it suitable for standby applications and provides higher reliability.

Conclusion

The SMG63VB821M20SLL aluminum electrolytic capacitor is a reliable, cost-effective solution for various demanding operations that require high performance. Its working principle is based on a simple concept and its features enable it to store much more electric charge than other capacitors. Moreover, the low leakage current ensures reliability and longer lifespan of the product when used in standby applications.

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