F17102681044

F17102681044 Application Field and Working Principle

Film capacitors are types of capacitors composed of a plastic film as an insulating layer, multilayer film capacitors consist of several thin films that polypropylene film (PP) and polyester film (PET) are the most used. This type of capacitor has several distinct advantages over conventional aluminum electrolytic capacitors, making them better suited for certain applications. F17102681044 is a cylindrical capacitor from Panasonic. This section will discuss the applications and working principles of F17102681044.

Applications

F17102681044 is mainly used for high frequency applications due to the small dielectric loss, great frequency reliability and temperature stability. It is widely utilized in communications and electronics, such as filtering, coupling, decoupling, timing, oscillation, impedance matching, etc. Moreover, due to its low ESR, high-temperature performance, and low leakage current features, F17102681044 can be used in automotive equipment applications, such as anti-lock brake systems, fuel injection systems, electric windows, and satellite navigation systems.

Working Principle

The working principle of film capacitor can be best demonstrated with an equivalent circuit. The film capacitor equivalent circuit is consists of a low equivalent slore inductor Ls, a high equivalent series resistance R, and a capacitor C. Ls is formed primarily by the skin effect and the distributed capacitance of the dielectric and metalization layers. R is the result of the sheet resistance, the lead distance, and the resistance of the connection wires. C is the equivalent of the film capacitor, which is the sum of the capacitance of the dielectric layers and the metallized patterns. These all components are connected in series and as the current flows in the circuit, the current divides into two parts. The first part flows through R, while the other part directions to C. The current I1 will create charges on the capacitance plate, which will produce a potential E1. I1 will cause current to flow in the inductor, and the result will be a voltage E2. Finally, the voltage difference between E1 and E2 will result in the voltage over the capacitor C. The capacitance of the film capacitor will depend on the combination of different factors, such as the type of metal used, the thickness of the metal layer, and the dielectric composition.