An electric heating device as supplemental heating for motor vehicles includes
as the heating elements power transistors directly mounted on the printed circuit
board. For efficient removal of the dissipation heat from the power transistors
the latter are in direct contact on their underside with a cooling element via
openings in the printed circuit board. In order to simplify manufacture, the cooling
elements are formed in two pieces: the heat conducting disk with a small thermal
mass insertable into the opening of the printed circuit board, and the cooling
body which can be connected to that heat-conducting element.
