| abstract |
A low-voltage self-regulating heating device ( 200 ) for operation with supply voltages in the range of 0.1-12 volts having first and second layers ( 104, 106 ) of material, at least one of which is PTC material interposed between a first electrode ( 102 ) and a second electrode ( 108 ). Also a high-voltage self-regulating heating device ( 300 ) for operation with supply voltages above 240 volts having first and second layers ( 104, 106 ) of material, at least one of which is PTC material interposed between a first electrode ( 102 ) and a second electrode ( 108 ). |