Surge protection device, comprising at least one surge arrester and one thermally trippable switching device connected in series with the surge arrester

A surge protection device, comprising at least one surge arrester (1) and one thermally trippable switching device (9;

• 10;
• 11) connected in series with the surge arrester (1), wherein the aforementioned means form a structural unit and the thermal tripping means (4K) is arranged in the region in which heating of the surge arrester (1) is to be expected on overloading thereof, wherein the thermal tripping means (4K) is formed as a stop part through which no operating or surge current flows and which releases unlatching of the switching device in the case of thermal overload, wherein the stop part (4K) is further coupled thermally and mechanically to a surface side (2) of the surge arrester (1) and blocks the movement path of a mechanically prestressed unlatching slide (6), characterized in that a contact platelet (111) is inserted into the unlatching slide (6), said contact platelet producing an electrical connection between the elements (10;
• 11) of the switching device, wherein the contact platelet (111), with unlatching, is subjected to a shifting movement resulting in an interruption to the series circuit of the switching device and movement of the unlatching slide (6) into the space previously assumed by the contact platelet (111), wherein at least the section of the region of the unlatching slide which separates the elements of the switching device is formed in an insulating manner.