Film capacitor is a kind of capacitor with plastic film as dielectric, which has many advantages and wide application fields. The following is a detailed introduction to film capacitors:
Thin film capacitors usually consist of a metal foil as an electrode, combined with a plastic film such as polyethyl ester (PET), polypropylene (PPS), polystyrene (PP) or polycarbonate (PPP), overlapping from both ends and winding into a cylinder. This structure makes the film capacitor can be divided into two types: winding type and lamination type.
Film capacitance features:
According to the type of plastic film used, film capacitors can be divided into many types, such as polyethyl ester capacitors (Mylar capacitors), polypropylene capacitors (PP capacitors), polystyrene capacitors (PS capacitors) and polycarbonate capacitors.
Thin film capacitors are widely used in various electronic devices, including electric vehicles, solar power generation systems, EMI filters, etc. Their high reliability and excellent performance make them the first choice for many demanding applications.
Compared to other types of capacitors, thin film capacitors have higher temperature tolerance, longer life and less failure rates. In addition, they can also be manufactured into larger capacitance values, storing more electrical energy.
Non-polarity: Thin film capacitors do not have polarity, which makes them work well in different electronic devices.
High insulation resistance: These capacitors have a high insulation resistance, which can effectively prevent short circuits.
Excellent frequency characteristics: Film capacitors perform well at different frequencies and are suitable for a variety of circuit designs.
Low dielectric loss: They have low dielectric loss, helping to reduce energy loss.
Self-healing function: Some film capacitors have self-healing function, that is, after being subjected to mechanical shock or other forms of damage, they are still able to restore their original performance.
Temperature stability: Thin film capacitors have small capacitance changes under temperature changes and strong adaptability.
With its unique structure, excellent performance and wide application fields, thin film capacitors occupy an important position in modern electronic equipment.
