Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are widely used in many different applications due to their well-known properties such as high capacitance and low cost. Product series B43508B9397M2, branded by TDK, is one of the most used and popular aluminum electrolytic capacitors. B43508B9397M2 distinguishes itself thanks to improved capacitance retention over a wide temperature range, low ESR, increased vibration stability, and minimized changes in capacitance. The B43508B9397M2 series of aluminum electrolytic capacitors is widely used in various high-reliability applications such as automotive, industrial, and military.

Working Principle

Aluminum electrolytic capacitors are specialized capacitors that have two aluminum foils separated by a paper dielectric along with an electrolyte. The electrolyte is commonly sulfuric acid, however, there are other electrolytes like boric acid or organic electrolytes that can be used. One of the aluminum foils is coated with an aluminum oxide layer. This oxide layer is then covered by an etched paper sleeve to further protect the oxide layer. The other aluminum foil is uncoated and has a printed circuit board contact, or an external contact, sealed directly to it. This is the side that is typically connected to the power source.

When the capacitor is connected to a power source, a chemical reaction takes place between the electrolyte and the aluminum plates. This reaction then separates electrons from the aluminum plates and leaves a positive charge on one of the plates and a negative charge on the other. This charge separation creates a potential difference across the plates, allowing electric energy to be stored.

When the power source is disconnected, the electric field across the plates causes the electrons to be rearranged, thus restoring the plates to their original charges. This same process is repeated when the capacitor is connected to a power source again. This process of charging and discharging is what allows the capacitor to store and release electric energy.

Application Field

The B43508B9397M2 series of aluminum electrolytic capacitors is used in a wide range of applications in areas such as automotive, industrial, and military. These capacitors are especially beneficial in applications that require the capacitor to operate in harsh environments, such as automotive vehicles, due to their improved capacitance retention and vibration stability. The capacitors can also be used in industrial applications where its low ESR and capacitance stability are required.

The B43508B9397M2 series of aluminum electrolytic capacitors is also widely used in military applications. These capacitors are capable of withstanding extreme temperatures, vibrations, shocks, and other conditions typically encountered in military applications. These capacitors are also capable of operating in high frequency circuits, making them ideal for applications that require high-frequency operation.

Conclusion

The B43508B9397M2 series of aluminum electrolytic capacitors is widely used in a variety of applications due to its improved capacitance retention, low ESR, increased vibration stability and minimized changes in capacitance. These capacitors are suitable for use in automotive, industrial, and military applications due to their ability to operate in harsh environments and high frequencies. They are also widely used in applications that require capacitors to have improved vibration stability and capacitance retention.