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Metallized film capacitors are made of two metallized films with plastic film as the dielectric. A very thin (~ 0.03 μm [ 2 ] ) vacuum-deposited aluminum metallization is applied to one or both sides to serve as electrodes.
The electrodes of film capacitors may be metallized aluminum or zinc, applied on one or both sides of the plastic film, resulting in metallized film capacitors or a separate metallic foil overlying the film, called film/foil capacitors. Metallized film capacitors offer self-healing properties.
Metallized plastic polypropylene (German: Metallisierter Kunststoff Polypropylen), a type of plastic-film capacitor; Monobasic potassium phosphate, another name for monopotassium phosphate (KH 2 PO 4). The K comes from Latin kalium, which means potassium. Not to be confused with magnesium potassium phosphate (MgKPO 4), a type of quick setting ...
Polypropylene film capacitors (PP) 0.02% Polyester film capacitors (PET) 0.2 to 0.5% Polyphenylene sulfide film capacitors (PPS) 0.05 to 0.1% Polyethylene naphthalate film capacitors (PEN) 1.0 to 1.2% Tantalum electrolytic capacitors with solid electrolyte: 2 to 3 %, [8] 10 % [9] Aluminium electrolytic capacitors with non-solid electrolyte: 10 ...
Metallised films have a reflective silvery surface similar to aluminium foil and are highly flammable. The coating also reduces the permeability of the film to light, water and oxygen. The properties of the film remain, such as higher toughness, the ability to be heat sealed, and a lower density at a lower cost than an aluminium foil.
An assortment of capacitor types. From left: multilayer ceramic, ceramic disc, multilayer polyester film, tubular ceramic, polystyrene, metalized polyester film, aluminum electrolytic. Major scale divisions are in centimetres. Most capacitors have a dielectric spacer, which increases their capacitance compared to air or a vacuum.
The predominant application of all electrolytic capacitors is in power supplies.They are used in input and output smoothing capacitors, as decoupling capacitors to circulate the harmonic current in a short loop, as bypass capacitors to shunt AC noise to the ground by bypassing the power supply lines, as backup capacitors to mitigate the drop in line voltage during sudden power demand or as ...
Run capacitors are mostly polypropylene film capacitors (historically: metallised paper capacitors) and are energized the entire time the motor is running. [1] Run capacitors are rated in a range of 1.5 to 100 μF, with volt classifications of 250, 370 and 440 V. [1]