Film capacitors use metal foil as the electrode, and plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate are overlapped from both ends and rolled into a cylindrical capacitor. With excellent electrical characteristics, high stability and long life, it can meet various application requirements. Capacitor manufacturers can optimize the characteristics of film capacitors by selecting the appropriate dielectric for the specific application.

Polyester film capacitors exhibit good characteristics in common applications, with high dielectric constant, high dielectric strength, self-healing and good temperature stability, low dielectric loss, high insulation resistance, low dielectric absorption and high dielectric strength . With lower cost and small size, polyester capacitors are a good choice for DC applications such as decoupling, blocking, bypassing, and noise suppression. They are deeply loved by capacitor manufacturers and are also suitable for various film capacitors.

Most capacitor manufacturers choose to use AC input filters, electronic ballasts, and snubber circuits. Polypropylene film capacitors are available with a rated voltage of 400V or higher, meeting the requirements of industrial three-phase applications and professional equipment, and can also be used in switching power supplies, frequency identification and filter circuits, energy storage applications, etc. Bimetallic polypropylene film can withstand high voltage and high pulse load under high frequency conditions, and is also widely used in electronic ballasts, motor controllers, switching power supplies, displays, buffers, etc.

Film capacitors are an important part of the electronics industry. While the corresponding production and construction techniques are evolving to provide greater capacitance and better electrical performance, the characteristics of these components are closely related to older products. In this case, capacitor manufacturers provide one-on-one service, which helps to solve design problems and ensure the smooth completion of basic functional modules such as interference filters, basic signal conditioning circuits, and electronic ballasts.