A switchgear cabinet includes a closed housing, and a cooling device for cooling items of electrical and/or electronic equipment disposed inside the housing. The cooling device includes a first closed cooling circuit containing a first cooling medium for removing heat generated during operation of at least one of the items of equipment from the housing. The first cooling circuit is connected inside the housing to a first heat exchanger for transferring the heat from the at least one item of equipment to the first cooling medium and, outside the housing, to a second heat exchanger for dissipating the heat to an external cooling medium, with the second heat exchanger disposed above the first heat exchanger. The first cooling circuit, the first cooling medium and the first and second heat exchangers are designed to implement heat transfer according to the two-phase thermosiphon principle.