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1. WO2000017892 - OVERVOLTAGE PROTECTION DEVICE INCLUDING WAFER OF VARISTOR MATERIAL

Publication Number WO/2000/017892
Publication Date 30.03.2000
International Application No. PCT/US1999/021899
International Filing Date 20.09.1999
Chapter 2 Demand Filed 30.03.2000
IPC
H01C 7/10 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
CRESISTORS
7Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
10voltage responsive, i.e. varistors
H01C 7/12 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
CRESISTORS
7Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
10voltage responsive, i.e. varistors
12Overvoltage protection resistors; Arresters
CPC
H01C 7/10
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
CRESISTORS
7Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
10voltage responsive, i.e. varistors
H01C 7/12
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
CRESISTORS
7Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
10voltage responsive, i.e. varistors
12Overvoltage protection resistors
Applicants
  • TYCO ELECTRONICS CORPORATION [US]/[US]
Inventors
  • ATKINS, Ian, Paul
  • BALLANCE, Robert, Michael
  • CORNELIUS, Jonathan, Conrad
  • KAMEL, Sherif, I.
  • KIZIS, John, Anthony
  • MABRY, Clyde, Benton, III
Agents
  • GERSTNER, Marguerite, E.
Priority Data
09/157,87521.09.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OVERVOLTAGE PROTECTION DEVICE INCLUDING WAFER OF VARISTOR MATERIAL
(FR) DISPOSITIF DE PROTECTION CONTRE LES SURTENSIONS COMPRENANT UNE PLAQUETTE EN MATERIAU DU TYPE VARISTANCE
Abstract
(EN)
An overvoltage protection device includes a first electrode member having a first substantially planar contact surface and a second electrode member having a second substantially planar contact surface facing the first contact surface. A wafer formed of varistor material and having first and second opposed, substantially planar wafer surfaces is positioned between the first and second contact surfaces with the first and second wafer surfaces engaging the first and second contact surfaces, respectively. The contact surfaces may apply a load to the wafer surfaces. Preferably, the electrode members have a combined thermal mass which is substantially greater than a thermal mass of the wafer. The wafer may be formed by slicing a rod of varistor material. The device may include a housing including the first substantially planar contact surface and a sidewall, the housing defining a cavity within which the second electrode is disposed.
(FR)
L'invention concerne un dispositif de protection contre les surtensions qui comprend une première électrode ayant une première surface de contact sensiblement plane et une seconde électrode ayant une seconde surface de contact sensiblement plane, laquelle fait face à la première surface de contact. Une plaquette en matériau du type varistance, qui comporte des première et seconde surfaces de plaquette opposées, sensiblement planes, est placée entre les première et seconde surfaces de contact, et les première et seconde surfaces de la plaquette s'engagent respectivement avec les première et seconde surfaces de contact. Les surfaces de contact peuvent appliquer une charge aux surfaces de la plaquette. De préférence, les électrodes présentent une masse thermique combinée sensiblement supérieure à celle de la plaquette, laquelle peut être formée par tranchage d'une tige de matériau du type varistance. Le dispositif peut comprendre un boîtier comprenant la première surface de contact et une paroi latérale, ce boîtier définissant une cavité dans laquelle on place la seconde électrode.
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