The claimed safety shutdown device can be used for the timely emergency shutdown of electrical equipment under the effect of high temperatures, for example in the event of a fire, as well as in the event of an overload or a short circuit. The safety shutdown device comprises a housing, and an aerosol module (12) containing an aerosol-forming or gas-forming composition, which projects beyond said housing. Disposed on the projecting portion of the module is a self-combusting heat-sensitive igniter (22) with a trigger temperature that is lower than the trigger temperature of the aerosol module (12). The safety shutdown device further comprises a heat-sensitive shutdown device (8), a contact group (18) for supplying an external trigger signal, an activation sensor (21), and a button (25) for manually activating an electrical igniter. The technical result consists in increasing the timeliness of an initial fire-extinguishing action and more efficiently impeding the spread of fire in an enclosed space.