The invention relates to an overload protection device (1) comprising a housing (2), which is designed to be fixed to a manipulation device. Said overload protection device comprises a tool holder (3) for fixing a tool that is attached to the housing in a displaceable manner, a pre-tensioning unit (4) for generating a pre-tensioning force between the housing and the tool holder, said pre-tensioning unit being configured as a plunger assembly with a pump plunger, which can be impinged by a medium and a switching unit (5) that operates by means of relative displacements between the housing and the tool holder. The invention is characterised in that the switching unit has at least one electrically conductive switching surface (6) and at least one electrically conductive contact element (7) that can be brought into electrical contact with the switching surface, said switching surface (6) and the contact element (7) being provided on opposing surface sections (8) of the tool holder and the housing. The contact element (7) is configured as a sealing element, which seals off at least sections of the pump plunger from the switching surface (6).