Capacitors are electrical components that are the basis of any electrical circuit. They are two electrically charged conductors separated by a dielectric such as paper, plastic, glass, air, or other material that is a weak conductor. A field is created between the two wires in which electrical energy can be stored. This conserved electrical energy can be used in compensating for dips in the electromagnetic field. The capacity of the stored electrical energy is measured with the unit farad.
Paper capacitors are a type of capacitors for which the dielectric is layers of impregnated paper and tinfoil tape wound on a tight roll. Compact and small mostly with solder pens or THT mounting, designed for very low frequency electrical signals only.