Current-compensated inductor, filter, high-voltage on-board electrical system and motor vehicle

The invention relates to a current-compensated inductor (11) for filtering interference signals which are transmitted between two high-voltage components (8, 9) of a high-voltage on-board electrical system (7) of a motor vehicle, comprising a toroidal, in particular circular ring-shaped or oval ring-shaped, magnet core (12) which surrounds an inner opening (13), and comprising at least two busbars(14) for electrically connecting the two high-voltage components (8, 9), wherein the busbars (14) are routed axially through the inner opening (13) of the magnet core (12) and are arranged at a distance from one another in the inner opening (13) so as to form an air gap (17), and wherein an inner side (15) of the magnet core (12), which inner side faces the inner opening (13), and regions (16a) of outer sides (16) of the busbars (14), which regions face the inner side (15) of the magnet core (12), have shapes which correspond to one another. The invention also relates to a filter (10), to a high-voltage on-board elec