Filmmkondensaattorit

Filmmkondensaattorit, also known as film capacitors, are a type of capacitor where the dielectric material is a plastic film. This film is metallized with a thin layer of aluminum or zinc, or it can be a non-metallized film sandwiched between two metal foil electrodes. The construction typically involves winding these layers into a cylindrical or rectangular package.

The dielectric materials used in film capacitors are diverse, including polyester (Mylar), polypropylene, polycarbonate, polystyrene, and PTFE (Teflon). Each material offers different properties in terms of temperature stability, dielectric loss, and frequency response. Polyester film capacitors, for instance, are common due to their cost-effectiveness and good capacitance stability, though their performance can degrade at higher temperatures. Polypropylene film capacitors are known for their low dielectric loss and excellent high-frequency performance, making them suitable for power electronics and audio applications.

Filmmkondensaattorit are valued for their stability, low dissipation factor, and good voltage rating. They are widely used in various electronic circuits, including power supplies, audio amplifiers, filtering circuits, and motor run applications. Their reliability and predictable performance make them a staple in both consumer electronics and industrial equipment. The choice of specific film material and construction depends on the intended application and the required electrical characteristics.