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Film Capacitors

A film capacitor, also commonly known as a film dielectric capacitor, plastic film capacitor, polyester capacitor, or simply “film cap”, is a capacitor that uses a thin plastic film as the dielectric material. As the dielectric material, the following are typically used: polyester film, polycarbonate film, polypropylene film, and the like. Film capacitors have many advantageous features, making them popular for a wide variety of engineering applications.

Overview

Film capacitors are dielectric capacitors whose dielectric material is a film made of polyester, polycarbonate, polypropylene, or other plastic-like substances. It is widely used in many electrical systems because of its small size, high capacitance, and reliability.

Film capacitors are typically constructed by laminating two thin metalized films with a thin plastic film in between. The plastic film works as the dielectric, and the metalized films serve as the electrode. The metalized films often have an extremely thin layer of inert oxide on one surface to more efficiently reduce the surface contact resistance.

Since the plastic film does not absorb moisture, dielectric absorption does not occur when a film capacitor is energized, resulting in low power loss and high electrical insulation. Also, since a film capacitor is constructed using a thin plastic film, the capacitor itself is very low profile, making it a highly useful device for applications where space is limited.

In addition to its low profile, the plastic film material that composes the dielectric of film capacitors can provide advantages with respect to dielectric strength, stability over time and temperature, and self-healing properties. This makes film capacitors ideal for high-frequency applications, as well as for applications where the capacitor is subject to frequent voltage variations.

168223J100A Application Field and Working Principle

The 168223J100A film capacitor is a general-purpose device, designed for use in communication and power supply equipment. It is well-suited for applications where space is limited, such as audio circuits, DC power supplies, and RF communication circuits.

The 168223J100A film capacitor is constructed from two metalized plastic films, with a thin film of copper oxide in between them. This construction provides an extremely low profile and excellent reliability. The plastic film also provides good quality electrical insulation and stability over time and temperature.

The 168223J100A film capacitor has a high capacitance, low ESR, low DF, and excellent working stability. It also provides excellent self-healing properties, resulting in a long life expectancy. This makes it an excellent choice for circuits with high frequency components.

Conclusion

The 168223J100A film capacitor is a general-purpose device that provides excellent performance and reliability in applications where space is limited, such as audio circuits, DC power supplies, and RF communication circuits. The capacitor’s construction and self-healing properties make it an ideal choice for high-frequency applications, as well as for applications where the capacitor is subject to frequent voltage variations.

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