Patent ID: 7148453

Claim:
An electrical heating device comprising: a device housing, a layered structure held by the housing device and including at least one radiator element, at least one contact plate and at least one thermally dissipating element, and a control unit controlling the heater power of the at least one thermally dissipating element, the control unit including a circuit board including at least one track, a transistor for controlling a current fed to the at least one thermally dissipating element, the transistor being mounted on the circuit board and electrically connected to at least one track, an interrupter element which in its initial position electrically connects opposite facing ends of the at least one track, a fusible element that is thermally coupled to the transistor, and an actuating element which is pretensioned by the fusible element, which is activated when the fusible element has been fused by overheating of the transistor and which acts against the interrupter element on actuation and releases the interrupter element from the circuit board at least so far that the electrical connection is interrupted.