MAL215360221E3

Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are a type of capacitor that uses an aluminum oxide layer as a dielectric. They are the most commonly used type of capacitor. Aluminum electrolytic capacitors are polarized, meaning they must be connected with the correct polarity in order for them to work correctly. The negative lead is usually marked with a stripe or indentation next to the case.

MAL215360221E3 Application Field

MAL215360221E3 aluminum electrolytic capacitors are typically used in power supply and other DC-DC conversion circuits, such as are found in computers, LCD monitors, cell phones and other consumer electronic devices. They are also used in power supplies and charging systems for computers, motorcycles, cars, etc. In general, they are used for small applications that require low-ESL and high-voltage performance. Aluminum electrolytic capacitors are also widely used in audio circuits and they are very good at reducing noise.

MAL215360221E3 Working Principle

Basically, aluminum electrolytic capacitors are constructed of a very thin layer of aluminum oxide that is sandwiched between two layers of aluminum foil. The aluminum oxide acts as the dielectric between the two conductors. When the capacitor is connected to a voltage source, a current passes through the oxide film and causes it to expand, creating a stronger bond that allows electricity to pass through it more easily. The main advantage of aluminum electrolytic capacitors is their relatively high capacitance for their size. This gives them much higher levels of capacitance than other types, such as film capacitors or ceramic capacitors. This means they are suitable for use in applications where high levels of capacitance are needed.