Film capacitors, also called plastic film capacitors, are capacitors with dielectric mediums using film materials such as polyethylene terephthalate (PET), plasticized polyvinyl chloride (PVC), polyphenylene sulfide (PPS), polystyrene (PS), and other kinds of film.a A typical film capacitor is composed of metal foil electrodes, a dielectric film, and a protective shell. Film capacitors are divided into metalized film capacitors, metallized film capacitors, and metal film capacitors. ECH-U1273JC9 is a metalized film capacitor. This article will provide an introduction to the application fields and working principle of the metalized film capacitor ECH-U1273JC9.

As diverse capacitors, different types of film capacitors can be used for power, energy storage, filtering, communication, and audio applications. ECH-U1273JC9 is a metalized film capacitor which typically has a higher performance than film capacitors with other types of electrodes, such as metal foil and metallized film electrodes. Therefore, metalized film capacitors have the advantages of low loss, low equivalent series inductance, and high frequency. These features make ECH-U1273JC9 suitable for applications such as instantaneous power compensation, switching power supplies, resonant circuits, RF circuit decoupling, DC/DC conversion applications, and other power electronic applications.

The working principle of a metalized film capacitor is based on the fact that when a voltage is applied across two metal electrodes, electrostatic fields are created. The electric field exerts a force on the electrons in the metal-film structure, enabling the electrons to move and form an electric current. The current travels through the film, creating an electrostatic field between the metalized film plates. As the voltage increases, the field strength increases, thus resulting in more charge stored in the capacitor. The more charge stored, the higher the capacitance. The capacitance of a film capacitor is determined by the size, spacing, and type of dielectric material used. Meanwhile, the dielectric material itself is made up of multiple layers of film which act as insulators between the metal plates.

Metalized film capacitors such as ECH-U1273JC9 are widely used in power, energy storage, filtering, communication, and audio applications due to their low loss, low equivalent series inductance, and high frequency. In addition, these capacitors have the advantage that they can be used in a wide range of operating temperatures and conditions. Ultimately, ECH-U1273JC9 capacitors can be used to regulate the voltage and current according to the specific requirements of various applications.