Electrical plug-in device for a panelboard

An electrical plug-in device (4a..4d) for a panelboard (1) is disclosed, wherein the panelboard (1) comprises an insulating enclosure (5) with recesses (6) arranged in a matrix and wherein the electrical plug-in device (4a..4d) provides mechanical and electrical connection between the panelboard (1) and a switching device (7). Insulating contact covers (11a, 11b) or contact cover pairs (12) of the electrical plugin device (4a..4d) are designed to reach through the recesses (6) and are arranged along a center line (D). A distance (yi, y2) between said center line (D) and a boundary plane (E, F) of the electrical plug-in device (4a..4d) parallel to said center line (D) equals half a pitch (x) of the recesses (6) or is an integer multiple of said half of said pitch (x). Furthermore, a panelboard (1) with such an electrical plug-in device (4a..4d) is disclosed.