Electric heating device for a motor vehicle

An electric heating device for a motor vehicle with a dual-voltage vehicle electrical system, wherein the dual-voltage vehicle electrical system comprises a first sub-system with a voltage source having a first nominal voltage and a second sub-system with a voltage source having a second nominal voltage, wherein the nominal voltage of said second sub-system is lower than the nominal voltage of said first sub-system, said electric heating device comprising:

• a supply connection connectable to the first sub-system of said dual-voltage vehicle electrical system,
• an electric heating element,
• a switching element for controlling a current supply from said supply connection to said heating element,
• a control device connectable to the second sub-system of said dual-voltage vehicle electrical system for providing a control signal for said switching element,
• a capacitive element connected between an output of said control device and a control connection of said switching element, so that said control connection of said switching element is connected via said capacitive element to said control device, and
• a rectifier device connected between said capacitive element and said control connection of said switching element.