10 Facts About Film capacitor

Should an individual Film capacitor develop an internal short, the resulting fault current blows the fuse, thus isolating the failed Film capacitor from the remaining devices.

Breakdown voltage can be increased by using one-sided partially metallized films, or the breakdown voltage of the capacitor can be increased by using double-sided metallized films.

One of the great advantages of plastic films for capacitor fabrication is that plastic films have considerably fewer defects than paper sheets used in paper capacitors.

MP Film capacitor, single-sided metallized paper, windings impregnated with insulating oil.

The actual capacitance value of a Film capacitor should be within the tolerance limits, or the Film capacitor is out of specification.

An AC voltage will cause an AC current, with cyclic charging and discharging of the Film capacitor causing oscillating motion of the electric dipoles in the dielectric.

Dielectric absorption is the name given to the effect by which a Film capacitor that has been charged for a long time discharges only incompletely when briefly discharged.

Suppression Film capacitor is an effective interference reduction component because its electrical impedance decreases with increasing frequency, so that at higher frequencies they short circuit electrical noise and transients between the lines, or to ground.

In more expensive ballasts, a film capacitor is often paired with the inductor to correct the power factor.

The Film capacitor absorbs the inductive turn-off peak current temporarily, so that the resulting voltage spike is limited.