F339X122248MD02W0

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Film capacitors are widely used in a variety of electrical systems due to their small size, low parasitics, and excellent reliability. The F339X122248MD02W0 is one such device—a miniature film capacitor with low parasitics, a wide operating temperature range, and high frequency performance. This article will examine the F339X122248MD02W0’s application field and working principle.

Application Field

The F339X122248MD02W0 is a Teflon film/polarized dielectric AC capacitor with a metalized polypropylene film, which is used in general purpose power factor correction, power supply filter and surge absorption applications. Owing to its low loss and very low ESR, the F339X122248MD02W0 is particularly suitable for use in high frequency circuits, such as those in communications and robotics applications. Moreover, its compact dimensions make the F339X122248MD02W0 suitable for high-density board layouts, saving on both space and cost.

Working Principle

Film capacitors like the F339X122248MD02W0 work by storing electrical energy in a dielectric material between two metalized plates. As the plates are subjected to a voltage, an electric field is established between them, which causes the dielectric material to polarize. This polarization creates a positive charge on one plate and a negative charge on the other, resulting in an electric current being conducted between them. This current is then used to supply power to the electrical circuit.

One of the main advantages of film capacitors is their self-healing properties. In case of a breakdown or a sustained electric field, the film capacitor can “heal” itself by getting rid of any damaged portions of the dielectric, restoring it to its original state and ensuring continuous operation. This makes film capacitors more reliable and able to operate at higher voltages than electrolytic counterparts.

Conclusion

The F339X122248MD02W0 is a miniature film capacitor with low parasitics and excellent reliability. It is suitable for use in high-frequency circuits, as well as for high-density board layouts. Additionally, it features self-healing properties which make it more reliable than electrolytic equivalents. Those properties, along with its good temperature and frequency performance, make the F339X122248MD02W0 an ideal choice for power factor correction, power supply filters and other general purpose applications.

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