The invention relates to a contact part (20) for electrically connecting end-face contact layers on the end faces of a plastic film capacitor winding (10) of an encased electric single-phase or three-phase capacitor to a terminal wire (18, 34) or a connecting wire, comprising a preferably flat contact support with a terminal region for contacting a terminal wire (18, 34) or a connecting wire; comprising at least one contact piece (26) with at least one contact tip, said contact piece (26) extending upwards or downwards from the contact support in a substantially vertical manner, in order to establish an electric connection to an end-face contact layer (12, 14) by pressing the contact tip into said end-face contact layer (12, 14); and comprising a penetration depth-limiting device for limiting the penetration depth of the contact tip or the contact tips in the end-face contact layer (12, 14). The invention also relates to encased single-phase and three-phase capacitors comprising said contact part.