Abstract: An electromagnetic actuator comprises: a pole tube, extending along a longitudinal axis so as to define an internal volume and having an external surface, the pole tube being made of a ferromagnetic material and including a magnetic separation region positioned at the external surface, along a circumference surrounding the longitudinal axis, the magnetic separation region defining a magnetic decoupling; an electromagnetic coil, surrounding the external surface of the pole tube; a stationary core, connected to the pole tube; a movable core, positioned in the internal volume and movable along the longitudinal axis, the electromagnetic actuator being characterized in that the magnetic separation region includes a plurality of recesses, angularly spaced to one another along the circumference, around the longitudinal axis.