A multi-signaling hinged safety switch for mobile protection barriers includes a fixed member designed to be secured to a stationary part of the barrier and having a pair of axial end holes, a movable member designed to be secured to a pivotal part of the barrier and having a pair of substantially transverse arms located outside the fixed member and pivoted to the axial end holes, an electrical detection system within the fixed member switching one or more electric safety circuits of the barrier at a predetermined switching angle. A pair of cylindrical pins extend in cantilever fashion from the arms and are pivotally inserted in the holes, with mutually spaced opposed ends defining a gap with no axial connection member therein. The detection system includes a pair of detectors each interacting with one end of a pin and having a switching angle that are operatively independent of each other.