Patent ID: 6166619
Filing Date: 2000-12-26
Classification: H01C

Abstract:
An overcurrent limiter comprising:a) at least two meandering resistor branches connected in parallel with each other;b) each of the resistor branches containing at least one PTC resistor;c) the PTC resistors in each of the two meandering resistor branches each having at least one resistor track with plural track areas, each track area adjacent a successive track area establishing a current flow path opposing that of the successive track area;d) the resistor tracks of each resistor branch being separated by an electrical insulator from each other and arranged opposite one another in such a way that partial currents flow through directly opposing track areas of the two resistor branches in directly opposite directions;e) said opposing track areas having a predefinable, consistent distance from one another in a range from 0.01 mm to 1 mm;f) at least two of said opposing resistor tracks having a meandering, symmetrical design and including inductively uncompensated marginal areas;g) one compensating resistor being connected electrically in series with each of said resistor tracks;h) the compensating resistor having one left and one right compensation branch;i) the left and right compensation branches being arranged in electrically insulated fashion and at a predefinable distance from inductively uncompensated marginal areas of the resistor tracks; andj) the left and right compensation branches of the compensating resistor being matched in shape with the inductively uncompensated marginal areas of the resistor tracks.