Motor protection switch with lockable rotary knob according to IEC/EN60947, 3-pole size PKZM0, with adjustable overload and instantaneous short-circuit release, phase failure sensitive, screw and snap-on mounting, with screw terminals, cap installation dimension 45mm, rated operating voltage Ue 690V, protection class IP20, finger-safe according to VDE 0106 T. 100, available accessories: auxiliary switch, voltage release, switching drive, clip plate