Friction clutch

A friction clutch for a drive of an auxiliary unit of an internal combustion engine of a vehicle, having an electromagnet assembly comprising a coil body having a coil and a magnet body connected to the coil body, wherein when the coil is energized, a magnetic field having magnetic field lines is generated, wherein the magnetic field lines pass through the magnet body and a magnetizable conductive body adjacent to the magnet body, such that a displaceable magnetizable armature portion can be brought from one position into another position, wherein the coil body has two axially opposed side surfaces and two radially opposed side surfaces, with the coil therebetween, each being of an annular design and having an associated dimension of the coil body, wherein the magnet body completely covers one of the two axially opposed side surfaces of the coil body that is directly adjacent to the magnet body, wherein one of (i) the two radially opposed side surfaces of the coil body are not covered by the magnet body, (ii) the two radially opposed side surfaces of the coil body are not covered by the magnet body by more than a value of 20 percent of an axial dimension of the two radially opposed side surfaces of the coil body, or (iii) one of the two radially opposed side surfaces is covered by the magnet body by not more than an axial dimension value of 70 percent of the one of the two radially opposed side surfaces, wherein axially extending annular legs, which extend from a base, of the conductive body cover opposite radial portions of the magnet body to form a cross-sectional area in an axial direction of the magnet body and in a direction perpendicular to the axial direction in the axially extending annular legs of the conductive body through which the magnetic field passes.