EP 0932166 A1 19990728 - Polymeric PTC composition and circuit protection device made therefrom

Title (en)

Polymeric PTC composition and circuit protection device made therefrom

Title (de)

PTC-Polymerzusammensetzung und daraus hergestellte Schaltungsschutzeinrichtung

Title (fr)

Composition PTC polymère et dispositif de protection de circuits fabriqués à partir de celle-ci

Publication

EP 0932166 A1 19990728 (EN)

Application

EP 98120252 A 19981026

Priority

JP 1051398 A 19980122

Abstract (en)

Disclosed is a polymeric PTC composition comprising an organic polymer and conductive particles having a melting point of not less than 2000 DEG C dispersed therein, with the conductive particles being treated with a coupling agent and a circuit protection device having a PTC element comprising the polymeric PTC composition and at least two electrodes which are pressure welded to the PTC element and electrically connected thereto. The polymeric PTC composition is used to provide a circuit protection device having excellent environmental resistance properties, which exhibits a low resistance under normal operating conditions, and protects the circuit against the over-current even under large electric current and high voltage.

IPC 1-7

H01C 7/02; H01C 7/13

IPC 8 full level

H01C 7/02 (2006.01); H01C 7/13 (2006.01)

CPC (source: EP)

H01C 7/027 (2013.01); H01C 7/13 (2013.01)

Citation (search report)

[PX] EP 0866471 A1 19980923 - MITSUBISHI ELECTRIC CORP [JP]
[YA] EP 0758131 A2 19970212 - TDK CORP [JP]
[Y] US 4884163 A 19891128 - DEEP MARGUERITE E [US], et al
[A] EP 0780849 A2 19970625 - ABB RESEARCH LTD [CH]
[A] EP 0696036 A1 19960207 - ABB RESEARCH LTD [CH]

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0932166 A1 19990728; EP 0932166 B1 20070321; DE 69837378 D1 20070503; DE 69837378 T2 20071129

DOCDB simple family (application)

EP 98120252 A 19981026; DE 69837378 T 19981026