An electronic assembly comprising: - a planar printed circuit board having electrical conductor tracks, - at least one electronic power component which has electrical connections and is mounted on the printed circuit board in such a way that its electrical connections are in electrically conductive connection with conductor tracks of the printed circuit board - a heat sink which serves to dissipate the heat generated by the electronic power component during operation to the environment and, on its upper side facing the printed circuit board, has at least two flat surface regions (11, 12) which extend parallel to the printed circuit board and of which at least one, in the assembled state, is at a first distance from the printed circuit board and at least one is at a second distance from the printed circuit board which second distance is greater than the first distance, the latter surface area forming the bottom of a trough-shaped recess formed in the upper side of the heat sink, into which recess the electronic power component projects, and against which the housing of the electronic power component rests via an interposed layer of a contact material which is at least a good conductor of heat, and wherein the volume of the trough-shaped recess, which surrounds the housing of the electronic power component, is filled with a contact material which is at least a good conductor of heat, - fastening means by which the printed circuit board and the heat sink are connected to one another, characterized - in that the at least one electronic power component serves as a spacer between the heat sink and the printed circuit board in such a way that its electrical connections are flush with a surface of its housing and this surface bears closely against the flat side of the printed circuit board carrying the conductor tracks, and - in that, at least in the vicinity of the at least one electronic power component, the free space between the printed circuit board and the heat sink is at least partially filled with a layer of an electrically insulating contact material with good thermal conductivity. - a planar printed circuit board having electrical conductor tracks, - at least one electronic power component which has electrical connections and is mounted on the printed circuit board in such a way that its electrical connections are in electrically conductive connection with conductor tracks of the printed circuit board - a heat sink which serves to dissipate the heat generated by the electronic power component during operation to the environment and, on its upper side facing the printed circuit board, has at least two flat surface regions (11, 12) which extend parallel to the printed circuit board and of which at least one, in the assembled state, is at a first distance from the printed circuit board and at least one is at a second distance from the printed circuit board which second distance is greater than the first distance, the latter surface area forming the bottom of a trough-shaped recess formed in the upper side of the heat sink, into which recess the electronic power component projects, and against which the housing of the electronic power component rests via an interposed layer of a contact material which is at least a good conductor of heat, and wherein the volume of the trough-shaped recess, which surrounds the housing of the electronic power component, is filled with a contact material which is at least a good conductor of heat, - fastening means by which the printed circuit board and the heat sink are connected to one another, - in that the at least one electronic power component serves as a spacer between the heat sink and the printed circuit board in such a way that its electrical connections are flush with a surface of its housing and this surface bears closely against the flat side of the printed circuit board carrying the conductor tracks, and - in that, at least in the vicinity of the at least one electronic power component, the free space between the printed circuit board and the heat sink is at least partially filled with a layer of an electrically insulating contact material with good thermal conductivity.