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GB1508327A - Varistors - Google Patents

Varistors

Info

Publication number
GB1508327A
GB1508327A GB2730275A GB2730275A GB1508327A GB 1508327 A GB1508327 A GB 1508327A GB 2730275 A GB2730275 A GB 2730275A GB 2730275 A GB2730275 A GB 2730275A GB 1508327 A GB1508327 A GB 1508327A
Authority
GB
United Kingdom
Prior art keywords
disc
electrode
face
resistance
grooves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2730275A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB1508327A publication Critical patent/GB1508327A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-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
    • H01C7/10—Non-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 voltage responsive, i.e. varistors
    • H01C7/102—Varistor boundary, e.g. surface layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)

Abstract

1508327 Varistors GENERAL ELECTRIC CO 27 June 1975 [1 July 1974] 27302/75 Heading H1K A multiphase transient voltage suppressor comprises a disc 10 of polycrystalline varistor material having at one face a plurality of grooves 11 dividing the face into lands 15, 16 and of which series an electrode 19, 20, and a single electrode 25 on the other face. The surface path between the opposite edges of each groove 11 is longer than the current path directly through the thickness of the disc 10. Each of the electrodes 19, 20 (of which there are preferably four separated by cruciform grooves) is connected to a lead 23, 24 extending out through plastics encapsulation 26, whereas electrode 25 is not externally connected. Under normal steady state conditions the resistance of disc 10 is of the order of thousands of megohms but a high voltage transient between leads 23, 24 reduces the varistor resistance there. between via two thicknesses of the disc 10 and the electrode 25 to a fraction of an ohm.
GB2730275A 1974-07-01 1975-06-27 Varistors Expired GB1508327A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US48492374A 1974-07-01 1974-07-01

Publications (1)

Publication Number Publication Date
GB1508327A true GB1508327A (en) 1978-04-19

Family

ID=23926201

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2730275A Expired GB1508327A (en) 1974-07-01 1975-06-27 Varistors

Country Status (4)

Country Link
JP (1) JPS589566B2 (en)
DE (1) DE2528090C2 (en)
GB (1) GB1508327A (en)
NL (1) NL182598C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3004736A1 (en) 1979-02-09 1980-08-21 Tdk Electronics Co Ltd NON-LINEAR RESISTANCE ELEMENTS AND METHOD FOR THE PRODUCTION THEREOF
GB2162368A (en) * 1984-07-24 1986-01-29 Bowthorpe Emp Ltd Electrical surge protection
WO2007046076A1 (en) * 2005-10-19 2007-04-26 Littelfuse Ireland Development Company Limited A varistor and production method
US7525409B2 (en) 2004-12-22 2009-04-28 Abb Research Ltd. Method of manufacturing a varistor

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5485452U (en) * 1977-11-29 1979-06-16
US4212045A (en) * 1978-12-22 1980-07-08 General Electric Company Multi-terminal varistor configuration
US4371860A (en) * 1979-06-18 1983-02-01 General Electric Company Solderable varistor
FR2475791A1 (en) * 1980-02-12 1981-08-14 Thomson Csf NON-LINEAR CERAMIC RESISTANCE WITH LOW THRESHOLD VOLTAGE AND METHOD OF MANUFACTURING THE SAME
DE3140802A1 (en) * 1981-10-14 1983-05-26 AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang Multi-electrode varistor
US4785276A (en) * 1986-09-26 1988-11-15 General Electric Company Voltage multiplier varistor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501322A (en) * 1946-11-07 1950-03-21 Westinghouse Electric Corp Moisture-resistant lightning arrester valve block
BE572049A (en) * 1957-12-03 1900-01-01
US2935712A (en) * 1958-02-04 1960-05-03 Victory Engineering Corp Multi-terminal non-linear resistors
US2989713A (en) * 1959-05-11 1961-06-20 Bell Telephone Labor Inc Semiconductor resistance element
US3195091A (en) * 1963-05-13 1965-07-13 Automatic Elect Lab Non-linear resistance devices
US3768058A (en) * 1971-07-22 1973-10-23 Gen Electric Metal oxide varistor with laterally spaced electrodes
US3742419A (en) * 1971-09-30 1973-06-26 Gen Electric Integral sensor for monitoring a metal oxide varistor
US3693053A (en) * 1971-10-29 1972-09-19 Gen Electric Metal oxide varistor polyphase transient voltage suppression

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3004736A1 (en) 1979-02-09 1980-08-21 Tdk Electronics Co Ltd NON-LINEAR RESISTANCE ELEMENTS AND METHOD FOR THE PRODUCTION THEREOF
GB2162368A (en) * 1984-07-24 1986-01-29 Bowthorpe Emp Ltd Electrical surge protection
AU586174B2 (en) * 1984-07-24 1989-07-06 Bowthorpe Emp Limited Electrical surge protection
US7525409B2 (en) 2004-12-22 2009-04-28 Abb Research Ltd. Method of manufacturing a varistor
WO2007046076A1 (en) * 2005-10-19 2007-04-26 Littelfuse Ireland Development Company Limited A varistor and production method
CN101331562B (en) * 2005-10-19 2011-06-01 东莞令特电子有限公司 A varistor and production method

Also Published As

Publication number Publication date
NL7507645A (en) 1976-01-05
NL182598B (en) 1987-11-02
JPS589566B2 (en) 1983-02-22
DE2528090A1 (en) 1976-01-22
NL182598C (en) 1988-04-05
JPS5124742A (en) 1976-02-28
DE2528090C2 (en) 1985-06-05

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee