ALF40C123EB040

Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors use an aluminum oxide film to provide internal capacitance to store electrical charge. This type of capacitor, also known as an \'electrolytic\', is composed of two polarized aluminum foils forming two layers in between which an electrolyte is used as a medium.

The ALF40C123EB040 is a popular aluminum electrolytic capacitor used in many applications such as power supplies, computer systems, audio equipment and medical devices. It has a capacitance of 40µF, a voltage rating of 63V, a temperature range of -40°C to +125°C, a rated lower impedance of 101Ω and a dielectric strength of 2000VAC.

Working Principles

Aluminum electrolytic capacitors work by having a thin layer of aluminum on one side called the anode. The anode and cathode together are sandwiched between a layer of aluminum oxide. This layer acts as an insulator to help create a high capacitance when voltage is applied. When the positive potential is applied to the anode, electrons accumulate on the anode creating an electric field, and the current flows from the anode to the cathode. This current is what charges the capacitor.

The amount of capacitance an aluminum electrolytic capacitor has depends on the area of the aluminum plates, the thickness of the insulating layer, the dielectric constant of the insulating layer, and the distance between the plates.

Application Field

The ALF40C123EB040 is used in many applications due to its wide temperature range, low impedance, high dielectric strength, and wide capacitance range. It is suitable for applications where high current but low voltage levels are required, such as in power supplies, computer systems, audio equipment, and medical devices. It can also be used in oscillator circuits, signal coupling, and smoothing applications.

It is also ideal for medical devices due to its wide temperature range and low impedance, as medical applications often require components that can operate in a wide temperature range with low ESR. This type of capacitor is also effective in smoothing, coupling, and shock and vibration damping applications, and other applications that involve high current levels.