Plastics housing with: a housing component composed of a first thermoset plastic or thermoplastic respectively modified with thermally conductive fillers; and with at least one sealing element (29a, 29b) composed of a second, resilient plastic, where the at least one sealing element (29a, 29b) has been cohesively bonded to the housing component or has been moulded in interlocking manner onto the housing component; and with at least one covering cap (33, 34) placed onto the housing component at an end section (10a, 10b) of the housing component, where the sealing element seals a transitional area (35, 36) of the housing component in relation to the covering cap (33, 34) placed onto the housing component, where the plastics housing has a first covering cap placed onto the housing component at a first end section of the housing component, and has a second covering cap placed onto the housing component at a second end section of the housing component, said second end section being opposite to the first end section, where the housing component has a first transitional area at the first end section and has a second transitional area at the second end section, the first transitional area and the second transitional area respectively being configured in stepped manner and adjacent to a peripheral region of the housing component, and where the plastics housing has a first sealing element which, at the first end section of the housing component, has been cohesively bonded to the housing component or has been moulded in interlocking manner onto the housing component, and where the plastics housing has a second sealing element which, at the second end section of the housing component, has been cohesively bonded to the housing component or has been moulded in interlocking manner onto the housing component. a housing component composed of a first thermoset plastic or thermoplastic respectively modified with thermally conductive fillers; and with at least one sealing element (29a, 29b) composed of a second, resilient plastic, where the at least one sealing element (29a, 29b) has been cohesively bonded to the housing component or has been moulded in interlocking manner onto the housing component; and with at least one covering cap (33, 34) placed onto the housing component at an end section (10a, 10b) of the housing component, where the sealing element seals a transitional area (35, 36) of the housing component in relation to the covering cap (33, 34) placed onto the housing component, where the plastics housing has a first covering cap placed onto the housing component at a first end section of the housing component, and has a second covering cap placed onto the housing component at a second end section of the housing component, said second end section being opposite to the first end section, where the housing component has a first transitional area at the first end section and has a second transitional area at the second end section, the first transitional area and the second transitional area respectively being configured in stepped manner and adjacent to a peripheral region of the housing component, and where the plastics housing has a first sealing element which, at the first end section of the housing component, has been cohesively bonded to the housing component or has been moulded in interlocking manner onto the housing component, and where the plastics housing has a second sealing element which, at the second end section of the housing component, has been cohesively bonded to the housing component or has been moulded in interlocking manner onto the housing component.