A film capacitor is a type of capacitor that uses a thin plastic film as the dielectric material. It typically uses metal foil or aluminum foil as electrodes, with the insulating film placed between them. Film capacitors are widely used in various electronic and power equipment due to their high durability, stable performance, and low loss characteristics.

Mechanism

Film capacitors use plastic films (such as polyester, polypropylene, etc.) as the dielectric material. These films have high insulation properties, preventing electrical discharge within the capacitor. The electrodes are made of metal foil, which is placed on both sides of the film to store electrical charge. Depending on the desired capacitance and performance, various materials and designs are used in the construction of film capacitors.

Features

• High Durability: Film capacitors are able to withstand harsh environments and long-term use, particularly being resistant to temperature and humidity changes.
• Stable Performance: They provide stable performance against changes in temperature and voltage, making them highly reliable.
• Low Loss Characteristics: Compared to other capacitors, film capacitors have lower internal losses, resulting in higher energy efficiency.
• Compact and Lightweight: Film capacitors can be designed to be relatively lightweight and compact, saving installation space.