page_title: Film capacitor
section_title: Frequency and temperature changes in capacitance
hierarchical_section_title: Film capacitor / Electrical characteristics / Capacitance standard values and tolerances / Frequency and temperature changes in capacitance
caption_attribution_description: Kapazitätsänderungen bei Folkos in Abhängigkeit von der Temperatur und der Frequenz
context_page_description: Film capacitors, plastic film capacitors, film dielectric capacitors, or polymer film capacitors, generically called "film caps" as well as power film capacitors, are electrical capacitors with an insulating plastic film as the dielectric, sometimes combined with paper as carrier of the electrodes.
  The dielectric films, depending on the desired dielectric strength, are drawn in a special process to an extremely thin thickness, and are then provided with electrodes. The electrodes of film capacitors may be metallized aluminum or zinc applied directly to the surface of the plastic film, or a separate metallic foil. Two of these conductive layers are wound into a cylinder shaped winding, usually flattened to reduce mounting space requirements on a printed circuit board, or layered as multiple single layers stacked together, to form a capacitor body. Film capacitors, together with ceramic capacitors and electrolytic capacitors, are the most common capacitor types for use in electronic equipment, and are used in many AC and DC microelectronics and electronics circuits.
  A related component type is the power capacitor.
context_section_description: The different film materials have temperature- and frequency-dependent differences in their characteristics. The graphs below show typical temperature and frequency behavior of the capacitance for different film materials.
caption: Capacitance as a function of temperature and frequency, for film capacitors with different film materials[62]
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