A male RJ45 connector includes a printed circuit (8) having electrical tracks, at least one earthing plate sandwiched between faces (23, 24) of the circuit and a slot extending longitudinally and opening on a side (38) of the circuit and being configured to pass through both the faces and the at least one earthing plate; and a spreader system (9) mounted on the circuit and including a separator body (25), an extension body (26) provided with a hollow (27) configured to receive the printed circuit and a central wall (28) dividing the hollow (27) into two parts and being configured to be inserted into the slot; the central wall and the at least one earthing plate being configured to be electrically interconnected and form an electrically and/or magnetically shielding barrier between pairs of conducting wires (11-14) mounted on the spreader and connected to the circuit.