Over-current protection apparatus
US6512446B2 · kind B2 · utility
5Cited by
4References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2001 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Nov 28, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C7/027
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention discloses an over-current protection apparatus, which comprises a current-sensitive element and at least two electrodes. The current-sensitive element is composed of a positive temperature coefficient (PTC) conductive composition, which includes at least one polymer, a conductive filler and a non-conductive filler. The melting point of the polymer is greater then 110° C., and the vicat softening point of the polymer is smaller than 110° C. for improving the conductivity and thermal stabilization of the over-current protection apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.