T-shaped bus connector, comprising: a holding device for mechanically retaining the T-shaped bus connector on a mounting device on which the T-shaped bus connector is to be arranged, a first and a second connecting unit (102, 103) for respectively producing an electrical connection to a complementary connecting unit of a device arranged adjacent to the bus connector, wherein the first and second connecting units face in opposing directions and are constructed complementarily to one another and a third connecting unit, oriented substantially perpendicular to the first and second connecting units, for producing an electrical connection to a connecting unit, complementary to the third connecting unit, of an electrical or electronic module, wherein data and/or power bus lines are run between all three connecting units, wherein all three connecting units (102, 103 and 104) are held in their positions by a circuit board, which additionally carries the data and/or power bus lines between all three connecting units, characterized in that all three connecting units of the T-shaped bus connector are covered at least in part with a shielding material, and the shielding material of each of the three connecting units can contact, in case of a connection of each connecting unit to a respective complementarily formed connecting unit, a shielding material at least partially covering this complementarily formed connecting unit and that the circuit board comprised by the bus connector, without being surrounded by an electrically conductive housing part or a plastic housing coated with metal, is completely shielded, at least with respect to the two outer layers, and the shielding material of each of the three connecting units is connected with a suitable potential of the circuit board. a holding device for mechanically retaining the T-shaped bus connector on a mounting device on which the T-shaped bus connector is to be arranged, a first and a second connecting unit (102, 103) for respectively producing an electrical connection to a complementary connecting unit of a device arranged adjacent to the bus connector, wherein the first and second connecting units face in opposing directions and are constructed complementarily to one another and a third connecting unit, oriented substantially perpendicular to the first and second connecting units, for producing an electrical connection to a connecting unit, complementary to the third connecting unit, of an electrical or electronic module, wherein data and/or power bus lines are run between all three connecting units, wherein all three connecting units (102, 103 and 104) are held in their positions by a circuit board, which additionally carries the data and/or power bus lines between all three connecting units, characterized in that all three connecting units of the T-shaped bus connector are covered at least in part with a shielding material, and the shielding material of each of the three connecting units can contact, in case of a connection of each connecting unit to a respective complementarily formed connecting unit, a shielding material at least partially covering this complementarily formed connecting unit and that the circuit board comprised by the bus connector, without being surrounded by an electrically conductive housing part or a plastic housing coated with metal, is completely shielded, at least with respect to the two outer layers, and the shielding material of each of the three connecting units is connected with a suitable potential of the circuit board.