B41550E4339Q000

Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are electric double layer capacitors that are made using an anode of a pure aluminum foil with an oxidized layer formed on its surface, a porous paper separator soaked in electrolyte, and a cathode of aluminum foil. Aluminum electrolytic capacitors are mainly used because of their relatively small size and high capacitance, and are therefore applicable to various types of circuit designs.

B41550E4339Q000, a product of Vishay Intertechnology, is an aluminum electrolytic capacitor. Its application field includes general purpose, energy storage, power supplies, and automotive applications. It has a wide temperature range of -55°C to +105°C, a capacitance range of 3.3 to 68000 μF, and a voltage range of 25 to 1000 VDC.

Working Principle

The aluminum electrolytic capacitor works on the basis of the electrolytic polarization phenomenon. The action of the electrolyte contained in the capacitor leads to an electrical double layer formed on the electrolyte-electrode interface. The formation of this double layer increases the electrical insulation properties and non-linear capacitance of the capacitor.

The surface of the anodic aluminum foil in the B41550E4339Q000 electrochemical capacitor is coated with an, electrically insulating, oxide layer. In the presence of an electrolyte, in which anions and cations are present, there is a higher concentration of cations near the anode, while the anions concentrate near the cathode. This results in an electrical double layer which stores the electric charge.

When an AC voltage is applied to the aluminum electrolytic capacitor, the current will have two parts: a charging current, which is the bulk current that charges the capacitor, and a dielectric leakage current, which is the current that leaks through the oxide layer of the anode. The charging and discharging of the capacitor is caused by the dielectric absorption of the oxide layer.

Applications

B41550E4339Q000 aluminum electrolytic capacitors are suitable for a variety of applications, such as power supplies, general purpose, and automated equipment, motor control, switch mode power supplies, and automotive applications. It is suitable for medium power DC and AC circuits, and it is suitable for both high frequency and low frequency applications.

In general purpose applications, the B41550E4339Q000 is suitable for bypass and decoupling circuits, and for the filtering of AC ripple in the output of DC power supplies. It can also be used for the coupling and decoupling of power supplies, for EMI suppression, and as an input and output filter in audio circuits.

In automotive applications, the B41550E4339Q000 can be used for onboard automotive accessories, as a power source for car navigation systems, and as an electric load for car audio systems. In switch mode power supplies, it can be used for higher frequency conversion ratios, higher efficiency, and faster converters.