JPS642303A - Circuit protecting element - Google Patents

Circuit protecting element

Info

Publication number
JPS642303A
JPS642303A JP15865687A JP15865687A JPS642303A JP S642303 A JPS642303 A JP S642303A JP 15865687 A JP15865687 A JP 15865687A JP 15865687 A JP15865687 A JP 15865687A JP S642303 A JPS642303 A JP S642303A
Authority
JP
Japan
Prior art keywords
layer
circuit
current
ptc
protecting element
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
JP15865687A
Other languages
Japanese (ja)
Other versions
JPH012303A (en
JP2548202B2 (en
Inventor
Shingo Yoshida
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.)
Nippon Mektron KK
Original Assignee
Nippon Mektron KK
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 Nippon Mektron KK filed Critical Nippon Mektron KK
Priority to JP62158656A priority Critical patent/JP2548202B2/en
Publication of JPH012303A publication Critical patent/JPH012303A/en
Publication of JPS642303A publication Critical patent/JPS642303A/en
Application granted granted Critical
Publication of JP2548202B2 publication Critical patent/JP2548202B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Thermistors And Varistors (AREA)

Abstract

PURPOSE: To effectively protect a circuit not resistant to an overcurrent by connecting a current limiting layer to a positive temperature coefficient (PTC) layer to form a protecting element.
CONSTITUTION: A circuit protecting element l includes a PTC layer 2 and a current control layer 3 thermally and electrically connected to the PTC layer 2. Hereby, even if overvoltage is applied to an associated circuit owing to any accident through electrodes 4a, 4b connected to the circuit, the layer 3 does not allow a current beyond a threshold to flow whereby a current flowing through the circuit is controlled to a value less than a saturation current from the first. Then, when temperature of the layer 3 rises beyond a predetermined value owing to energy corresponding to a product of the saturation current and the overvoltage, the resistance of the layer 2 is steeply increased to limit the current flowing through the circuit to a predetermined value. This arrangement assures effective protection of a circuit not resistant to an overcurrent.
COPYRIGHT: (C)1989,JPO&Japio
JP62158656A 1987-06-25 1987-06-25 Circuit protection element Expired - Fee Related JP2548202B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62158656A JP2548202B2 (en) 1987-06-25 1987-06-25 Circuit protection element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62158656A JP2548202B2 (en) 1987-06-25 1987-06-25 Circuit protection element

Publications (3)

Publication Number Publication Date
JPH012303A JPH012303A (en) 1989-01-06
JPS642303A true JPS642303A (en) 1989-01-06
JP2548202B2 JP2548202B2 (en) 1996-10-30

Family

ID=15676476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62158656A Expired - Fee Related JP2548202B2 (en) 1987-06-25 1987-06-25 Circuit protection element

Country Status (1)

Country Link
JP (1) JP2548202B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020246147A1 (en) * 2019-06-04 2020-12-10 パナソニックＩｐマネジメント株式会社 Lithium primary battery

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5678269U (en) * 1979-11-09 1981-06-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5678269U (en) * 1979-11-09 1981-06-25

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020246147A1 (en) * 2019-06-04 2020-12-10 パナソニックＩｐマネジメント株式会社 Lithium primary battery

Also Published As

Publication number Publication date
JP2548202B2 (en) 1996-10-30

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees