Abstract: A rolled film capacitor is disclosed which includes a first dielectric film and a second dielectric film, which are wound along their length dimension to form alternating turns of the winding. A plurality of first conductive segments are arranged on a first surface of the first dielectric film along the length dimension of the first dielectric film, and a plurality of second conductive segments are arranged on a surface of the second dielectric film along the length dimension of the second dielectric film, or on a second surface of the first dielectric film along the length dimension of the first dielectric film. The first conductive segments can have a progressively increasing length along the length dimension of the first dielectric film, and the second conductive segments have a progressively increasing length along the length dimension of the first or second dielectric film. The number of the first and/or second conductive segments per turn of the winding can be equal to or more than one.

Abstract: A rolled film capacitor is disclosed which includes a first dielectric film and a second dielectric film, which are wound along their length dimension to form alternating turns of the winding. A plurality of first conductive segments are arranged on a first surface of the first dielectric film along the length dimension of the first dielectric film, and a plurality of second conductive segments are arranged on a surface of the second dielectric film along the length dimension of the second dielectric film, or on a second surface of the first dielectric film along the length dimension of the first dielectric film. The first conductive segments can have a progressively increasing length along the length dimension of the first dielectric film, and the second conductive segments have a progressively increasing length along the length dimension of the first or second dielectric film. The number of the first and/or second conductive segments per turn of the winding can be equal to or more than one.

Abstract: A power capacitor including at least one capacitor element enclosed in a container, wherein the container is of a material which substantially includes a first polymer material. Further, the container is cylindrical and provided in its surface with creepage distance extending protrusions of a second polymer material. The protrusions are formed with respect to their thickness and radial length so as to cool the capacitor. In a method for manufacturing such a power capacitor, a substantially cylindrical container is made of a material which substantially includes a first polymer material. The container is provided on its envelope surface with creepage distance-extending protrusions of a second polymer material and the capacitor elements are encapsulated in the container.