B41252B128M

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Aluminum electrolytic capacitors are widely used in the electronics industry, and also known as electric double-layer capacitors or supercapacitors. B41252B128M aluminum electrolytic capacitors are generalizable capacitors with large capacity and long service life time. Understanding how they work and their practical applications can help people to make better use of this lot of capacitors, as well as serve as the basis for selecting sufficient rating and quality for specific electronic equipment or components.

A basic explanation of an aluminum electrolytic capacitor involves two separate but adjacent plates - an anode plate with aluminum oxide film, and a cathode plate with a dielectric electrolyte. As with all electrolytic capacitors, the “working principle” involves special construction that allows electricity to flow into and between these different plates. Depending on the charge and current, an electric and/or magnetic field is created between the plates.

This particular type of capacitor can be applied to different DC and AC devices, such as DC-DC converters, switching power supplies, low/medium currents applications, PFC circuits, smoothing, electronic ballasts, filtering, snubbers, DC link capacitors. Thanks to the feature that aluminum electrolytic capacitors possess, like low leakage current, low equivalent series resistance (ESR) and large capacity, mean these capacitors are especially suitable as energy storage devices in minor and medium devices.

In general, B41252B128M aluminum electrolytic capacitor has a rated voltage of 450V, temperature range from -40°C to +85°C, pf from 1.000 to 1.200 and a life span from 3000 to 8000 hrs, depending on the specific model. In terms of charging characteristics, they have the ability to reach and hold a certain voltage in a relatively short period of time with an increase of a few percent.

It is important to note that, like all aluminum electrolytic capacitors, this “working principle” is based on leakage current to charge and discharge, which impacts both its life span and working capacity. In general, the higher the voltage to be held, the lower the life span of the capacitor. Also, a downgrade in voltage will improve the life span of the capacitor, but it will also decrease its overall capacity. Therefore, selecting the right voltage rating is considered very important when fitting a B41252B128M aluminum electrolytic capacitor; ideally, the voltage rating should be as high as possible, but any overvoltage should be strictly avoided.

In terms of insulation and safety, B41252B128M aluminum electrolytic capacitors come with several standards, like the impregnation-based insulation, low-loss double-layer carbonfilm, self-healing metallized paper, charge/discharge protection, overvoltage protection, reverse voltage protection and thermal protection.

Thanks to their superior practical applications, user-friendly construction and features, B41252B128M aluminum electrolytic capacitors are available in the market as one of the most popular models today. Still, anyone who wants to optimize the performance of their electronic component should understand the general working principle and characteristics of this kind of capacitor before making any selection.

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