Film Capacitors

Film capacitors, also referred to as film dielectric capacitors, are a type of capacitor with a thin plastic film as its dielectric, a conductive metal layer on each side of the film, and a lead-out on one or both sides to the terminal. Film capacitors are used in a wide range of applications, including circuit boards, medical equipment, and more.

MKT1817347256G

The MKT1817347256G film capacitor is a polyester film double sectional type radial capacitor. It features a relatively low ESR, high ripple current, and durability that makes it suitable for many applications. It has a voltage range of 16-450 VDC, a capacitance range of 0.047-350µF, and a working temperature range of -55 to +125 Celsius.

Application Field

The MKT1817347256G film capacitor can be used in a wide range of applications, including automotive electronics, ballast applications, energy storage, and more. It has an excellent self-healing property which makes it suitable for high-voltage applications. It is also widely used in switching power supplies and filter applications, where its low ESR makes the performance more efficient.

Working Principle

A capacitor is a passive electronic component that is composed of two conducting plates separated by an insulating dielectric. When an electric current passes through the capacitor, an electric field is formed, and the electric charge is stored in the form of electric potential energy. In the MKT1817347256G capacitor, the two conducting plates are the metal layers on each side of the polyester film dielectric. The lead-outs provide the current to the capacitor.

When a voltage is applied to the capacitor, an electric field is created over the entire dielectric, which causes the electrons to move onto one of the conducting plates. This, in turn, attracts the remaining electrons towards the other conducting plate, allowing the capacitor to store electric charge. The capacitance is determined by the size of the capacitor plates, the dielectric material, the distance between the plates, and the temperature. When the applied voltage is removed, the capacitor discharges the stored energy over time.

Conclusion

The MKT1817347256G film capacitor is a versatile and cost-effective solution for a wide range of applications. It has a low ESR and high ripple current, as well as excellent self-healing properties, making it suitable for high-voltage applications. Its application field and working principle are discussed in this article.