Surge protector for telecommunications systems

Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation

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361 58, 361117, 361126, 338195, 338288, 338289, H02H 900, H01C 1000

Patent

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049997319

ABSTRACT:
A surge protector, particularly for protecting components in a telecommunications system, has a thin ceramic substrate on a surface of which is formed a surge protection resistor having a serpentine path extending over the substrate, the width of the path and the distance between adjacent path lengths being relatively narrow. Resistance trimming means are provided, positioned such that there is a substantially isothermal heat distribution over the substrate under surge conditions.

REFERENCES:
patent: 3781749 (1973-12-01), Iles et al.
patent: 3860465 (1975-01-01), Matzner et al.
patent: 4160897 (1979-07-01), Makino
patent: 4197521 (1980-04-01), Rovnyak
patent: 4284970 (1981-08-01), Berrin et al.
patent: 4298856 (1981-11-01), Schuchardt
Advances in Instrum, vol. 32, No. 2, 1977, pp. 213-220, ISA, U.S.; L. R. Thomas: Thick-Film Platinum Resistance Temperature Detectors, p. 215, paragraphs 2, 3; Figure (iii).
Hybrid Circuit Design and Manufacture, R. D. Jones, Tektronix Laboratories, Beaverton, Oreg., EEE 13; pp. 40-45; pp. 74-75; pp. 124-137.

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