Abstract: The present invention relates to a heating device for a motor vehicle with a dual-voltage vehicle electrical system. The heating device is operated with a power supply from the sub-system with the higher nominal voltage (for example 48 V), but actuated by a control device in the sub-system with the lower nominal voltage (for example 12 V). For this purpose, the heating device has a supply connection in the sub-system with the higher nominal voltage and a control connection in the sub-system with the lower nominal voltage. The control connection is disposed in particular on a control device which is integrated into the heating device and which is connected to a control connection of a switching element (power semiconductor) for controlling the heating device via a capacitive separating element in order to ensure potential isolation of the two sub-systems.

Abstract: A controller for an electric heating device comprising a support element and a busbar which is secured on the support element and which is connected to an SMD component in an electrically conductive manner. The busbar is part of an initially single-part stamped metal plate with a severed connecting piece, which separates the metal plate into a supply element and a discharge element, the elements being connected together in an electrically conductive manner solely via the SMD component. Also disclosed is a method of producing an electric heating device generally as described above such that the supply element and the discharge element are produced from the supply element region and the discharge element region on the stamped metal plate, respectively.

Abstract: A controller for an electric heating device comprising a support element and a busbar which is secured on the support element and which is connected to an SMD component in an electrically conductive manner. The busbar is part of an initially single-part stamped metal plate with a severed connecting piece, which separates the metal plate into a supply element and a discharge element, the elements being connected together in an electrically conductive manner solely via the SMD component. Also disclosed is a method of producing an electric heating device generally as described above such that the supply element and the discharge element are produced from the supply element region and the discharge element region on the stamped metal plate, respectively.