EP 0390807 A4 19910313 - ELECTRICAL DEVICE COMPRISING CONDUCTIVE POLYMERS
Title (en)
ELECTRICAL DEVICE COMPRISING CONDUCTIVE POLYMERS
Publication
Application
Priority
- US 8803377 W 19880930
- US 10298787 A 19870930
- US 11508987 A 19871030
- US 12469687 A 19871124
Abstract (en)
[origin: WO8903162A1] Circuit protection systems which comprise a PTC resistor (1) and a second resistor (6), e.g. a thick film resistor (6), which is thermally and electrically connected to the PTC resistor have a break current IB and a hold current IH such that the ratio IB/IH is at most 20. Suitable PTC resistors (1) are conductive polymer devices which comprise a PTC element (10) which has been radiation crosslinked under conditions such that the average dose rate is at most 3.0 Mrad/minute or during which no part of the PTC element (10) which is in contact with the electrodes (2, 3) reaches a temperature greater than (Tm-60) DEG C, where Tm is the melting point of the polymeric component of the conductive polymer (10).
IPC 1-7
IPC 8 full level
H01B 1/14 (2006.01); H01B 1/20 (2006.01); H01B 1/22 (2006.01); H01B 1/24 (2006.01); H01C 7/02 (2006.01); H05B 3/14 (2006.01)
CPC (source: EP KR)
H05B 1/02 (2013.01 - KR); H05B 3/146 (2013.01 - EP)
Citation (search report)
- [X] EP 0198598 B1 19910717
- [A] EP 0220003 A2 19870429 - RAYCHEM CORP [US]
- See references of WO 8903162A1
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
WO 8903162 A1 19890406; AT E145512 T1 19961215; DE 3855679 D1 19970102; DE 3855679 T2 19970619; EP 0390807 A1 19901010; EP 0390807 A4 19910313; EP 0390807 B1 19961120; HK 1006773 A1 19990312; JP 3181263 B2 20010703; JP 3335348 B2 20021015; JP H03500470 A 19910131; JP H11150003 A 19990602; KR 890702405 A 19891223
DOCDB simple family (application)
US 8803377 W 19880930; AT 88909937 T 19880930; DE 3855679 T 19880930; EP 88909937 A 19880930; HK 98105929 A 19980622; JP 21085998 A 19980727; JP 50911888 A 19880930; KR 890700951 A 19890530