397LBB450M2EF

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors (also known as electrolytic capacitors) are the most widely produced and used type of capacitors in both consumer and industrial electronics. They are also the most cost-effective, having one of the greatest capacity per unit volume when compared to other types of capacitors. As the name implies, they are filled with an electrolyte and are polarized components, requiring a certain orientation when using them in electronic circuits. Let us take a deeper look at the specific characteristics of aluminum electrolytic capacitors and their application field and working principle.

397LBB450M2EF

The specific aluminum electrolytic capacitor model, the 397LBB450M2EF, is an axial lead capacitor with a capacitance value of 450 µF. Its rated voltage is at 450 volts DC, whereas its operating temperature varies from -55 to +105°C, and the rated ripple current is also 70 amps, with a nominal ESR of 0.19 ohm. It has a relatively high capacity and excellent long-term stability, fewer ESR changes with voltage, and a design with a long life span, making it ideal for a variety of applications.

Application Field

The 397LBB450M2EF aluminum electrolytic capacitor is mainly used in the power, telecommunications and consumer/industrial electronics sectors, as well as in the automotive industry. It can be used in high \'ripple current\' applications such as DC to DC converters, switching power supply, change converters, power circuits, inverters and more. It is also the perfect choice for a variety of filtering and buffering operations, such as for signal or video filtering, improving the accuracy of timing devices and filtering of audio signals.

Working Principle

Aluminum electrolytic capacitors operate via a process known as electrolysis - two aluminum plates are separated by an electrolytic solution, while another aluminum plate and a metallic electrolytic surface are connected to each other and serve as the electrodes in push-pull circuits. Due to the different voltages of these two aluminum plates, electricity will move from one plate to the other, thus charging the capacitor as a whole. This makes them very good when it comes to flow control.

The 397LBB450M2EF aluminum electrolytic capacitor also relies on this principle. Its electrolyte is made up of a mixture of aluminum oxide, water, and ethylene glycol or polypropylene oxide and hence it is also known as the wet capacitor. It has solid manganese dioxide on the surface of the cathode, which will absorb the electrolyte and propel the capacitance when the capacitor is operated at the rated voltage.

The 397LBB450M2EF aluminum electrolytic capacitor has a very high capacity-to-volume ratio, making it ideal for projects where space is a premium. It can also handle more current than a comparable multi-layer ceramic capacitor (MLCC) and thanks to its electrolytic design, a very high capacitance is achievable in a comparatively small package. This makes it a great choice for systems with high ripple currents and other applications, such as power supplies, digital audio and amplifier circuits, and more.

Conclusion

Aluminum electrolytic capacitors are a crucial component in many electronic devices, and the 397LBB450M2EF, an aluminum electrolytic capacitor specifically, is a great choice for a variety of applications. Its electrolyte is composed of aluminum oxide, water, and ethylene glycol or polypropylene oxide and its solid manganese dioxide on the surface of the cathode is what propels its capacitance when operated at the rated voltage. It has a high capacity-to-volume ratio, handles more current than a comparable MLCC, and is also used in high ripple current applications. We hope that this article has been helpful in showing the capabilities and application fields of the 397LBB450M2EF aluminum electrolytic capacitor.

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