Abstract: A power resistor module for electrical circuits has at least one resistor element and at least one housing element. The at least one resistor element is mounted at least section-wise between two electrically insulating, thermally conductive insulation elements in the housing element. The insulation elements at least section-wise abut against the at least one housing element. Methods for producing an electrical power resistor module for an electrical circuit include compressing, at least one resistor element with two electrically insulating, thermally conductive insulation elements. At least one of the two insulation elements is pressed at least section-wise against a housing element. If a wire is used as the resistor element, the use of possible fillers such as magnesium oxide may be waived by providing that the wire abuts at least section-wise against at least one of the two insulation elements during the compression.

Abstract: A power resistor module for electrical circuits has at least one resistor element and at least one housing element. The at least one resistor element is mounted at least section-wise between two electrically insulating, thermally conductive insulation elements in the housing element. The insulation elements at least section-wise abut against the at least one housing element. Methods for producing an electrical power resistor module for an electrical circuit include compressing, at least one resistor element with two electrically insulating, thermally conductive insulation elements. At least one of the two insulation elements is pressed at least section-wise against a housing element. If a wire is used as the resistor element, the use of possible fillers such as magnesium oxide may be waived by providing that the wire abuts at least section-wise against at least one of the two insulation elements during the compression.

Abstract: A PTC heater for heating a tubular member includes an elongated profiled carrier body of heat conductive material having a first side provided with a flat support surface having a groove substantially perpendicular thereto extending along opposite longitudinal edges thereof and a second side provided with a channel of semi-circular cross-section for engaging the tubular member. A PTC heater element comprising a plurality of PTC resistance elements disposed between a pair of plate electrodes is positioned on the flat support surface in heat transmitting contact therewith and is covered by an elongate heat conductive cover member in flat surface engagement with the other side of the PTC heater element and provided with longitudinal rim portions closely fitted into the grooves. A U-shaped straddle clamping bracket having legs snap-fittingly anchored to the carrier body presses the cover toward the PTC heater element and carrier body.