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A film/foil capacitor is a non-polarized capacitor. Its dielectric is made using a thin plastic film between two layers of electrodes made out of aluminium foil. In other terms, a film/foil capacitor identical to a bipolar capacitor just with a thin plastic fi Mehr anzeigen
A film/foil capacitor is a non-polarized capacitor. Its dielectric is made using a thin plastic film between two layers of electrodes made out of aluminium foil. In other terms, a film/foil capacitor identical to a bipolar capacitor just with a thin plastic film/foil as their dielectric. It can either be inductive or non-inductive. The film/foil capacitor is known and valued for its low distortion factor and its excellent frequency characteristics. Also, it comes with a high insulation resistance and good capacitance stability. However, the main advantage of film/foil capacitors is that their internal construction is their direct contact to the electrodes on both of the winding's ends, which keeps all currents paths short.
Capacitors are almost essential in most electrical circuits, and their quantity varies from application to application. A capacitor is an electrical component in which electrical charge can be stored on one side (+), with simultaneous storage of the opposite charge on the other side (-). In audio applications, they are mainly used in crossover filters, where the combination with other components determines the filter's behaviour. However, if you want to learn more about capacitors, please check out our detailed blog "The basics of crossover components"! The blog also explains what you have to look for when choosing a capacitor!
The main difference between a capacitor and a battery is that a capacitor can be charged and discharged in a fraction of a battery's time. However, the price a capacitor has to pay for this advantage is their energy density – a battery can store a significantly larger amount of energy in the same space/size than a capacitor. In other words, if a battery and a capacitor would have the same size, a capacitor could only store a fraction of the energy a battery could store.
The main difference can be traced back to the type of dielectric used and its construction. The film/foil capacitors here at SoundImports are available in a wide range of capacitance values. Also, film/foil capacitors are more likely to resist the ageing over time, making them the favoured choice for high-frequency applications such as speaker building.