Overcurrent release device

An overcurrent release device for protection switching devices, in particular automatic line circuit breakers or motor protective switches, with electromagnetic and thermoelectric release, said overcurrent release device comprising a thermoconducting tubular supporting body onto which a coil is wound and which has a striking end and an opposite widened receiving end for bearing contact and radial support of a bimetal snap-action disk with a central bore, a core having a bore defined therein, an armature movable in said supporting body between its striking end and said core, and a slide extending through said bore in said snap-action disk and through said bore in said core in a direction towards said armature, with said slide being provided for thermoelectric disengagement by means of said snap-action disk via thickened portion and for electromagnetic disengagement by means of said armature via a slide actuator, and wherein, in the operative state, the spacing between said armature and said core corresponds at maximum to the snapping travel of said snap-action disk.