An electrical interruption switch, in particular for interrupting high currents at high voltages, (a) having a housing which encompasses a contact unit defining the current path through the interruption switch, and (b) having a propellant charge which comprises a gas-generating, activatable material, (c) wherein the contact unit has a first connection contact and a second connection contact, an upsetting region, a separation region and a sabot, (d) wherein the propellant charge and the contact unit are formed in such a way (i) that a current that is to be interrupted can be fed thereto by way of the first connection contact and can be discharged therefrom by way of the second connection contact, and (ii) that in the event of ignition of the propellant charge the sabot is subjected to a gas pressure, generated by the gas-generating activatable material, in such a way that the sabot in the housing is moved in a direction of movement from a starting position to an end position, and the upsetting region is thereby plastically deformed, wherein the separation region is separated completely, and in the end position of the sabot an insulation distance between the separated ends of the separation region is achieved, characterised in that (e) an extinguishing agent is provided in such a way that as a result of the movement of the sabot and as a result of the upsetting process of the upsetting region, the volume for receiving the extinguishing agent is reduced in such a way that the extinguishing agent is injected through at least one discharge channel, which connects the volume for receiving the extinguishing agent to the chamber in which the separation region is located, for extinguishing or for avoiding the occurrence of an electric arc between the ends of the separation region. (a) having a housing which encompasses a contact unit defining the current path through the interruption switch, and (b) having a propellant charge which comprises a gas-generating, activatable material, (c) wherein the contact unit has a first connection contact and a second connection contact, an upsetting region, a separation region and a sabot, (d) wherein the propellant charge and the contact unit are formed in such a way (i) that a current that is to be interrupted can be fed thereto by way of the first connection contact and can be discharged therefrom by way of the second connection contact, and (ii) that in the event of ignition of the propellant charge the sabot is subjected to a gas pressure, generated by the gas-generating activatable material, in such a way that the sabot in the housing is moved in a direction of movement from a starting position to an end position, and the upsetting region is thereby plastically deformed, wherein the separation region is separated completely, and in the end position of the sabot an insulation distance between the separated ends of the separation region is achieved, characterised in that (i) that a current that is to be interrupted can be fed thereto by way of the first connection contact and can be discharged therefrom by way of the second connection contact, and (ii) that in the event of ignition of the propellant charge the sabot is subjected to a gas pressure, generated by the gas-generating activatable material, in such a way that the sabot in the housing is moved in a direction of movement from a starting position to an end position, and the upsetting region is thereby plastically deformed, wherein the separation region is separated completely, and in the end position of the sabot an insulation distance between the separated ends of the separation region is achieved, (e) an extinguishing agent is provided in such a way that as a result of the movement of the sabot and as a result of the upsetting process of the upsetting region, the volume for receiving the extinguishing agent is reduced in such a way that the extinguishing agent is injected through at least one discharge channel, which connects the volume for receiving the extinguishing agent to the chamber in which the separation region is located, for extinguishing or for avoiding the occurrence of an electric arc between the ends of the separation region.