Switching device comprising - at least one contact point, - an arc extinguishing chamber assigned to the contact point, which comprises a plurality of extinguishing elements which are each arranged spaced apart from one another, and - an arc blow device assigned to the contact point for generating a magnetic blow field by which the switch arc (4, 4', 4") developing when the contact point opens is blown away from the contact point, wherein the switching device comprises at least one first arc guide plate which extends away from the contact point and by which the switch arc (4, 4', 4") is guided and stretched on the way from the contact point, the first arc guide plate comprising a first portion and a second portion within the arc extinguishing chamber, the first portion of the first arc guide plate being arranged proximal to the contact point, and the second portion of the first arc guide plate being arranged distal to the contact point, wherein an arc guide pin projecting from the second portion of the first arc guide plate is provided, characterized in that the arc extinguishing chamber comprises an exit opening through which plasma, which is generated inside the switching device by a switch arc (4, 4', 4") developing when the contact point opens, can exit out of the switching device, wherein the exit opening having a clearance dimension and defining an exit plane, wherein the extinguishing elements are arranged in the exit opening, wherein a depth of the exit opening is defined by the length of the extinguishing elements, wherein the switch arc (4, 4', 4") developing when the contact point opens is blown away from the contact point to the exit opening, wherein first arc guide plate extends from the contact point to the exit opening and the first portion and the second portion are arranged between the contact point and the exit plane, wherein the second portion of the first arc guide plate extends beyond the exit opening in a direction parallel to the exit plane so that the switch arc (4, 4', 4") is stretched by the second portion of the first arc guide plate at least at one end of the switch arc beyond the clearance dimension of the exit opening, wherein the arc guide pin is arranged in front of the exit opening and wherein the switch arc is again shortened in front of the exit opening by the arc guide pin. - at least one contact point, - an arc extinguishing chamber assigned to the contact point, which comprises a plurality of extinguishing elements which are each arranged spaced apart from one another, and - an arc blow device assigned to the contact point for generating a magnetic blow field by which the switch arc (4, 4', 4") developing when the contact point opens is blown away from the contact point, wherein the switching device comprises at least one first arc guide plate which extends away from the contact point and by which the switch arc (4, 4', 4") is guided and stretched on the way from the contact point, the first arc guide plate comprising a first portion and a second portion within the arc extinguishing chamber, the first portion of the first arc guide plate being arranged proximal to the contact point, and the second portion of the first arc guide plate being arranged distal to the contact point, wherein an arc guide pin projecting from the second portion of the first arc guide plate is provided, characterized in that the arc extinguishing chamber comprises an exit opening through which plasma, which is generated inside the switching device by a switch arc (4, 4', 4") developing when the contact point opens, can exit out of the switching device, wherein the exit opening having a clearance dimension and defining an exit plane, wherein the extinguishing elements are arranged in the exit opening, wherein a depth of the exit opening is defined by the length of the extinguishing elements, wherein the switch arc (4, 4', 4") developing when the contact point opens is blown away from the contact point to the exit opening, wherein first arc guide plate extends from the contact point to the exit opening and the first portion and the second portion are arranged between the contact point and the exit plane, wherein the second portion of the first arc guide plate extends beyond the exit opening in a direction parallel to the exit plane so that the switch arc (4, 4', 4") is stretched by the second portion of the first arc guide plate at least at one end of the switch arc beyond the clearance dimension of the exit opening, wherein the arc guide pin is arranged in front of the exit opening and wherein the switch arc is again shortened in front of the exit opening by the arc guide pin.