Electrical resistors – Resistance value responsive to a condition – Current and/or voltage
Patent
1997-09-03
2000-02-01
Gellner, Michael L.
Electrical resistors
Resistance value responsive to a condition
Current and/or voltage
338313, 338314, 338332, 338328, H01C 710
Patent
active
060208082
ABSTRACT:
A conductive polymer PTC device includes upper, lower, and center electrodes, with a first PTC conductive polymer layer between the upper and center electrodes, and a second PTC conductive polymer layer between the center and lower electrodes. Each of the upper and lower electrodes is separated into an isolated portion and a main portion. The isolated portions of the upper and lower electrodes are electrically connected to each other and to the center electrode by an input terminal. Upper and lower output terminals are provided, respectively, on the main portions of the upper and lower electrodes and are electrically connected to each other. The resulting device is, effectively, two PTC devices connected in parallel, thereby providing an increased effective cross-sectional area for the current flow path, and thus a larger hold current, for a given footprint.
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Bourns Multifuse (Hong Kong) Ltd.
Easthom Karl
Gellner Michael L.
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