FIELD: automobile electrical engineering. SUBSTANCE: invention specifically refers to device controlling rotation speed of electric motor of fan of heater in cabin of automobile. Resistor includes electric insulation base with contacts for connection of external circuits, ceramic frame with axial hole, space with bimetal safety fuse and nichrome spiral built into it, current leads, two of which partially run into space of ceramic frame closed by cover. Bimetal safety fuse is connected to current leads either by means of bent thinned ends of current leads or by means of short metal lock pins. EFFECT: protection of power supply circuit of electric motor against overcurrent and overheating of resistive element caused by faulty fan part of heater, adaptability to manufacture, raised reliability and self-restorability. 3 cl, 3 dwg
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