UPW1C390MDD

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Aluminum electrolytic capacitors are typically used in circuits where large capacitances are needed. They are one of the most common types of capacitor used today due to their cost-effectiveness, high capacitance, and wide range of available values. The UPW1C390MDD is a surface mount version of an aluminum electrolytic capacitor, designed to offer reliable performance in a wide range of applications. In this article, we will explore the UPW1C390MDD\'s application field and working principle.

Application Field

The UPW1C390MDD is primarily suitable for DC applications and rated for use with a maximum voltage of 10VDC, making it ideally suited for applications where high current loadings are required. It is also suitable for moderate AC loadings, such as audio and video signals, motor drive circuits, and communication circuits. This capacitor is designed to offer reliable performance with minimal losses due to the construction of its dielectrics, internal leads, and excellent ESR characteristics. Furthermore, this capacitor is also highly resistant to temperature fluctuations, making it suitable for both indoor and outdoor applications.

Working Principle

As the name suggests, the UPW1C390MDD is an aluminum electrolytic capacitor. This type of capacitor consists of a dielectric of aluminum foil which is then wound with a thin layer of electrolyte and contains a large amount of capacitance. This capacitor is able to store a very large amount of electrical energy because the electrical current is stored on the dielectric layer. The dielectric layer is responsible for this large capacitance, but is also the source of the capacitor’s leakage current.

In operation, the capacitor works in two ways, depending on the applied voltage. When a positive voltage is applied to the capacitor, a layer of cations (positively charged particles) are attracted to the negative electrode. At the same time, anions (negatively charged particles) are attracted to the positive electrode. Together, these two layers form a charged layer of ions, which is responsible for the capacitor’s capacitance. When a negative voltage is applied, the process is reversed and the stored energy is released back into the circuit.

The UPW1C390MDD offers a capacitance value of 390μF, which is approximately equivalent to 0.39 Farads (F). This is a relatively small value when compared to other capacitors on the market, but it is still suitable for many applications. The tolerance of this model is also rated at 10% (± 5%), which is quite good considering its small size. When selecting this capacitor, it is important to ensure that the voltage rating is suitable for the application and is not exceeded.

Advantages & Limitations

Aluminum electrolytic capacitors offer several advantages over other types of capacitor, such as ceramics and tantalum. Firstly, they are relatively inexpensive, making them a cost-effective choice for many applications. Secondly, they offer a wide variety of capacitance values, which is useful for tuning circuits. Finally, their construction also enables them to provide excellent ESR and leakage current performance.

The main limitation of aluminum electrolytic capacitors is that they have a limited lifespan. As the capacitor ages, the electrolyte gradually loses its ability to store electrical energy, resulting in decreased performance and eventual failure. Additionally, aluminum electrolytic capacitors are also sensitive to heat, so they must be carefully specified for use in temperature-sensitive applications.

Conclusion

The UPW1C390MDD is a small-sized aluminum electrolytic capacitor suitable for use in DC and moderate AC applications, where a large capacitance value is needed. This capacitor offers excellent reliability and is highly resistant to temperature fluctuations, making it a popular choice for many applications. Despite its small size, it offers a capacitance value of 390μF, which is more than sufficient for many applications. It is, however, important to ensure that the voltage rating of the application does not exceed that of the capacitor.

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