An electrical current transducer including a housing (5), a magnetic field detector device (3) comprising a magnetic field detector (11), and a magnetic circuit (2) comprising a magnetic core (4) with a gap (6) and a grounding device (8) mounted on the magnetic core. The magnetic field detector is positioned in the gap (6). The grounding device comprises at least two parts (8a, 8b), a first part (8a) mounted against a first lateral side (14a) of the magnetic core and a second part (8b) mounted against a second lateral side (14b) of the magnetic core opposite the first lateral side. At least one of the first and second parts comprises clamp fixing extensions (30a, 30b) cooperating with the other of the first and second parts configured for clamping together the first and second parts around a portion of the magnetic core. The least one of the first and second parts comprising electrically conductive material, said part comprising at least one contact terminal (34a, 34b) being adapted to provide an electrical grounding connection for grounding the magnetic core.