Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors, sometimes referred to simply as electrolytic capacitors, are the most commonly used type of capacitor. These capacitors are constructed with two aluminum foils that are separated by a thin layer of insulating material (the dielectric). An electrolyte, usually an organic solvent, bridges the two foils and helps form the capacitor. The electrolyte serves to provide a permanent electrical connection between the two foils, allowing electrons to travel back and forth from one foil to the other.

The MALREKB05DC333F00K aluminum electrolytic capacitor is a relatively common type of aluminum electrolytic capacitor, which offers excellent performance and reliability. This capacitor has the following characteristics:

Technical Specifications

• Capacitance: 330 uF ± 10%
• Voltage: 50 VDC
• Operating Temperature Range: -40°C to + 105°C
• Leakage Current: < 0.03CV (after 3 minutes)
• Impedance: < 5mOhm (at 100kHz)
• Ripple Current: 6.8A (RMS)

Application Field

The MALREKB05DC333F00K aluminum electrolytic capacitor is most commonly used in power supply and filter circuits, where moderate voltage levels are needed. This capacitor type is often used in switch mode power supplies for filtering and energy storage, as well as in audio amplifiers.

Working Principle

When an AC voltage is applied to an aluminum electrolytic capacitor, the aluminum foil behaves like an electrically conductive membrane. As electrons pass through the foil, an electric field is formed between the two foils, and as a result, a capacitor is created. During this process, an ionic current is also created, and this ionic current helps replenish the electrons that were lost.

When the applied voltage is removed, the electric field between the two foils will collapse, resulting in a reloading of the ions that were used to replenish the electrons. This reloading causes the capacitor to hold its charge for a set amount of time, even when the applied voltage is removed.

In short, the working principle of an aluminum electrolytic capacitor is to convert an AC voltage into a DC voltage. This is accomplished by the creation of an electric field between the two aluminum foils, which helps to replenish any electrons that were lost.