Market application status of film capacitors of different materials

Metal film capacitors are often used in places where much capacitance is required, such as power supply filtering, as well as the role of power storage functions. They also simulate signal connections and are widely used in noisy places, such as power supply noise. . Metal film capacitors have many excellent features: no polarity, high insulation resistance, excellent frequency characteristics, and low dielectric loss. Based on the above advantages, the film capacitor is used in a large amount on an analog circuit.

In particular, in the part where the signal is connected, it is necessary to use a capacitor having a good frequency characteristic and a very low dielectric loss to ensure that the signal is transmitted without excessive distortion. The structure is the same as the paper dielectric, and the medium is polyester or polystyrene. Polyester film capacitor, high dielectric constant, small size, large capacity, good stability, suitable for bypass capacitors. Polystyrene film capacitors, low dielectric loss, high insulation resistance, but high temperature coefficient, can be used in high frequency circuits.

Among all the plastic film capacitors, the characteristics of the polypropylene capacitor and the polystyrene capacitor are remarkable, and of course, the prices of the two capacitors are relatively high. However, in recent years, in order to improve the quality of sound equipment, the materials used have become more and more high, and the unit price is not an important consideration. Therefore, in recent years, the frequency and quantity of polypropylene capacitors and polystyrene capacitors have been used in audio equipment. More and more high.

The film used for the metalized film capacitor is polyethylene, polypropylene, polycarbonate, etc., and has a laminate type in addition to the wound type. Metallized film This type of capacitor has a so-called self-recovery effect, that is, if a small part of the electrode is short-circuited due to the fragile electrical boundary, the electrode metal around the short-circuited part will be caused by the capacitor at that time. With static or short-circuit current, a larger area of melting and evaporation is initiated to restore insulation, causing the capacitor to return to the capacitor again.

Metal film capacitors have become more and more widely used today, and are bound to become the capacitors needed for the development of various industries in the future. Therefore, it is important to understand its characteristics and applications. If you have problems with the technology of film capacitors, we will try our best to solve them. We sincerely serve every customer who comes to consult. Your presence is our driving force.

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