CA2043352A1 - Self-resetting overcurrent protection element - Google Patents

Self-resetting overcurrent protection element

Info

Publication number
CA2043352A1
CA2043352A1 CA2043352A CA2043352A CA2043352A1 CA 2043352 A1 CA2043352 A1 CA 2043352A1 CA 2043352 A CA2043352 A CA 2043352A CA 2043352 A CA2043352 A CA 2043352A CA 2043352 A1 CA2043352 A1 CA 2043352A1
Authority
CA
Canada
Prior art keywords
overcurrent protection
element body
self
protection element
polymers
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.)
Granted
Application number
CA2043352A
Other languages
French (fr)
Other versions
CA2043352C (en
Inventor
Toshiaki Abe
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.)
Daito Communication Apparatus Co Ltd
Original Assignee
Daito Communication Apparatus Co Ltd
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 Daito Communication Apparatus Co Ltd filed Critical Daito Communication Apparatus Co Ltd
Publication of CA2043352A1 publication Critical patent/CA2043352A1/en
Application granted granted Critical
Publication of CA2043352C publication Critical patent/CA2043352C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
    • H01C1/028—Housing; Enclosing; Embedding; Filling the housing or enclosure the resistive element being embedded in insulation with outer enclosing sheath
    • 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
    • H01C7/02—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 having positive temperature coefficient
    • H01C7/027—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 having positive temperature coefficient consisting of conducting or semi-conducting material dispersed in a non-conductive organic material

Abstract

A self-resetting overcurrent protection element uses an element body made up of a mixture of polymers and carbon black grafted with polymers. A resilient sheathing material covering the element body permits free expansion of the element body to permit the resistance of the overcurrent protection element to increase substantially in response to Joule's heating from high current. The sheathing materials preferably are made of elastic epoxy resins or silicone resins that allow significant expansion of the element body at the time of overcurrent protection, thus increasing the ratio of resistance in the element between an overcurrent state and a normal operating state.
CA002043352A 1990-06-15 1991-05-28 Self-resetting overcurrent protection element Expired - Fee Related CA2043352C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2156917A JPH0448701A (en) 1990-06-15 1990-06-15 Self-reset type overcurrent protection element
JP156917/1990 1990-06-15

Publications (2)

Publication Number Publication Date
CA2043352A1 true CA2043352A1 (en) 1991-12-16
CA2043352C CA2043352C (en) 1997-02-04

Family

ID=15638202

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002043352A Expired - Fee Related CA2043352C (en) 1990-06-15 1991-05-28 Self-resetting overcurrent protection element

Country Status (5)

Country Link
US (1) US5210517A (en)
EP (1) EP0461864B1 (en)
JP (1) JPH0448701A (en)
CA (1) CA2043352C (en)
DE (1) DE69113687T2 (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05234706A (en) * 1992-02-25 1993-09-10 Rohm Co Ltd Surface mount thermistor
US5852397A (en) 1992-07-09 1998-12-22 Raychem Corporation Electrical devices
EP0811993B1 (en) * 1992-07-09 2003-09-17 Tyco Electronics Corporation Electrical devices
EP0845148B1 (en) 1995-08-15 2000-01-19 Bourns Multifuse (Hong Kong), Ltd. Surface mount conductive polymer devices and method for manufacturing such devices
TW309619B (en) 1995-08-15 1997-07-01 Mourns Multifuse Hong Kong Ltd
US6059997A (en) * 1995-09-29 2000-05-09 Littlelfuse, Inc. Polymeric PTC compositions
FR2748166B1 (en) * 1996-04-26 1998-06-05 Gec Alsthom T & D Sa HIGH VOLTAGE POLYMER CURRENT LIMITER
JP4536830B2 (en) * 1997-03-27 2010-09-01 リッテルフューズ，インコーポレイティド Resettable automatic circuit protection device
US6020808A (en) 1997-09-03 2000-02-01 Bourns Multifuse (Hong Kong) Ltd. Multilayer conductive polymer positive temperature coefficent device
US6128168A (en) 1998-01-14 2000-10-03 General Electric Company Circuit breaker with improved arc interruption function
US6236302B1 (en) 1998-03-05 2001-05-22 Bourns, Inc. Multilayer conductive polymer device and method of manufacturing same
US6242997B1 (en) 1998-03-05 2001-06-05 Bourns, Inc. Conductive polymer device and method of manufacturing same
US6172591B1 (en) * 1998-03-05 2001-01-09 Bourns, Inc. Multilayer conductive polymer device and method of manufacturing same
WO2000019455A1 (en) 1998-09-25 2000-04-06 Bourns, Inc. Two-step process for preparing positive temperature coefficient polymer materials
US6144540A (en) * 1999-03-09 2000-11-07 General Electric Company Current suppressing circuit breaker unit for inductive motor protection
US6157286A (en) * 1999-04-05 2000-12-05 General Electric Company High voltage current limiting device
US6429533B1 (en) 1999-11-23 2002-08-06 Bourns Inc. Conductive polymer device and method of manufacturing same
US20020089408A1 (en) * 2000-01-11 2002-07-11 Walsh Cecilia A. Electrical device
US6579931B1 (en) 2000-02-25 2003-06-17 Littelfuse, Inc. Low resistivity polymeric PTC compositions
JP4119159B2 (en) * 2002-04-25 2008-07-16 タイコ エレクトロニクス レイケム株式会社 Temperature protection element
US20060152330A1 (en) * 2005-01-12 2006-07-13 Jong-Sung Kang PTC current limiting device having molding part made of insulating material
US7417527B2 (en) * 2006-03-28 2008-08-26 Tdk Corporation PTC element
JP2007305870A (en) * 2006-05-12 2007-11-22 Tdk Corp Ptc element
JP5304822B2 (en) * 2010-04-28 2013-10-02 株式会社デンソー Temperature sensor
JP6026276B2 (en) * 2010-07-02 2016-11-16 Ｌｉｔｔｅｌｆｕｓｅジャパン合同会社 PTC device and secondary battery having the same
US20170278600A1 (en) * 2013-03-28 2017-09-28 Littelfuse Japan G.K. Ptc device and secondary battery having same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824328A (en) * 1972-10-24 1974-07-16 Texas Instruments Inc Encapsulated ptc heater packages
DE2743880C3 (en) * 1977-09-29 1981-05-14 Siemens AG, 1000 Berlin und 8000 München Heating device with an optimized heating element made from PTC thermistor material
JPS60145594U (en) * 1984-03-02 1985-09-27 東京コスモス電機株式会社 Resistor element for planar heating element
JPH0690962B2 (en) * 1986-03-31 1994-11-14 日本メクトロン株式会社 Method for manufacturing PTC element
JPS6421601A (en) * 1987-07-17 1989-01-25 Toshiba Corp Supervisory control equipment
US4880577A (en) * 1987-07-24 1989-11-14 Daito Communication Apparatus Co., Ltd. Process for producing self-restoring over-current protective device by grafting method
US4873507A (en) * 1987-10-15 1989-10-10 Therm-O-Disc, Incorporated Encapsulated thermal protector
JPH01143203A (en) * 1987-11-27 1989-06-05 Murata Mfg Co Ltd Organic positive characteristic thermister

Also Published As

Publication number Publication date
CA2043352C (en) 1997-02-04
EP0461864A1 (en) 1991-12-18
EP0461864B1 (en) 1995-10-11
JPH0448701A (en) 1992-02-18
DE69113687D1 (en) 1995-11-16
US5210517A (en) 1993-05-11
DE69113687T2 (en) 1996-03-21

Similar Documents

Publication Publication Date Title
CA2043352A1 (en) Self-resetting overcurrent protection element
AU2576495A (en) Fluoroolefin, fluoropolymer, and thermoplastic resin composition containing the polymer
EP0371745A3 (en) Preparation of positive temperature coefficient compositions and their use in protection devices
CA2017038A1 (en) Carbon black having a high specific surface area
JPS6465172A (en) Conductive composition
CA2081517A1 (en) Cross-linked toner resins
DE3274361D1 (en) Thermoplastic moulding compositions on the basis of polycarbonate, poly(alkyleneterephthalate) and, possibly, one or more polymerizates
SE9001990D0 (en) SET TO MAKE AN ELECTRIC DEVICE
FR2666838B1 (en) COATINGS BASED ON THERMO-PLASTIC ELASTOMERS IN PARTICULAR FLOOR COVERINGS.
ATE202583T1 (en) WATER-DISPPERSIBLE EPOXY RESINS MODIFIED WITH COPOLYMERS OF VINYL ACETATE AND THEIR USE IN ELECTRICAL COATS
CA2229980A1 (en) Flexible thermoplastic resins with improved tensile strength
NZ333461A (en) Bitumen compositions comprising a bitumen component, a thermoplastic rubber of less than 8 %wt and an eva copolymer of less than 5 %wt
AU590689B2 (en) The use of substituted n-trichloromethyl thiodicarboximides in combination with n,n'-substituted bis-(2,4-diamino-s-triazin-6-yl)-oligosulfides in vulcanizable rubber mixtures and such rubber mixtures
EP0789055A4 (en) Polyoxymethylene resin composition
DE58903579D1 (en) POLYMER BLENDS WITH HIGH TENSILE STRENGTH AND GOOD Tear resistance.
EP0184851A3 (en) Graft polymer and vinyl chloride resin composition having improved weather resistance and impact resistance
EP0648811A3 (en) Thermoplastic resin compositions with high impact strength at low temperature.
EP0627464A3 (en) Butene-1 copolymers and resin compositions containing the same.
CA2065321A1 (en) Thermoplastic resin composition
DE3169443D1 (en) Thermoplastic resin composition having toughness and high thermal deformation resistance
GR3003975T3 (en)
EP0355056A3 (en) Blend comprising an epdm graft terpolymer and an acrylate rubber
JPS647493A (en) Heater with positive temperature coefficient of resistance
EP0858884A3 (en) Antistatic textile material
EP0352919A3 (en) Blend comprising epdm and acrylate rubbers having controlled graft levels

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed