B43254E2477M

Aluminum electrolytic capacitors (Al-Elecs) are widely used in power electronics, not least for their high capacity. In the case of the B43254E2477M, it is an Al-Elec device designed to serve in particular DC Link applications.

To understand how the B43254E2477M operates, it is important first to understand the basics of capacitors in general. The most basic definition of a capacitor is two conducting surfaces or plates separated by an insulating material called the dielectric. When voltage is applied to the capacitor, the two surfaces become charged and can store electric energy by establishing an electric field between the two. The electric field strength is determined by the capacitance of the device, which in turn is determined by the size of the surfaces, the spacing between them, and the type of dielectric material.

In an aluminum electrolytic capacitor, the two plates are made of aluminum foil. The dielectric is a thin layer of aluminum oxide which is electrochemically formed on the surface of the foil. This increases the surface area and the capacitance of the capacitor. The electrolyte, typically a 1 to 3% aqueous solution of ethylene glycol, serves to polarize the oxide-foil interface.

The B43254E2477M is designed for applications that require an extended operational lifetime. It has an aluminum case that is filled with an electrolytic solution of ethylene glycol, and its high-performance design includes a low equivalent series resistance (ESR) and low equivalent series inductance (ESL) for improved performance, especially in high-temperature applications. It has a rated capacitance of 4700 μF and a maximum operating voltage of 400 V.

The B43254E2477M is ideal for use in DC link applications as it has a long operational lifetime and can withstand higher temperatures. Moreover, it offers a high capacitance-to-volume ratio and selectable capacitance and voltage ratings. These features make the B43254E2477M the go-to choice for DC link applications where reliable and high-performance capacitors are required.