A surface radiator includes a light-emitting semiconductor component and a housing body. The housing body has a cooling channel forming part of a fluid path from an inlet opening to a return opening. A transparent emission window overlies the light-emitting semiconductor component. The housing body provides an attachment surface spaced apart from the emission window for the light-emitting semiconductor component. The arrangement of the emission window on the housing body is formed in a fluid-tight manner. The housing body, the semiconductor component and the emission window delimit an emission chamber. The fluid path is defined by a first cooling channel, which extends from the inlet opening through the housing body to an orifice opening, the emission chamber, and a second cooling channel, which extends from the discharge opening through the housing body to the return opening. The coolant is an electrically insulating liquid, which is transparent for the incident radiation.

A surface radiator includes a light-emitting semiconductor component and a housing body. The housing body has a cooling channel forming part of a fluid path from an inlet opening to a return opening. A transparent emission window overlies the light-emitting semiconductor component. The housing body provides an attachment surface spaced apart from the emission window for the light-emitting semiconductor component. The arrangement of the emission window on the housing body is formed in a fluid-tight manner. The housing body, the semiconductor component and the emission window delimit an emission chamber. The fluid path is defined by a first cooling channel, which extends from the inlet opening through the housing body to an orifice opening, the emission chamber, and a second cooling channel, which extends from the discharge opening through the housing body to the return opening. The coolant is an electrically insulating liquid, which is transparent for the incident radiation.