Individual secondary protection device
US6377434B1 · kind B1 · utility
11Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1999 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Oct 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/026
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A secondary protection device for protecting a circuit. The device includes a first positive temperature coefficient (PTC) resistor, a bidirectional zener diode and a second PTC resistor connected in series across input terminals. Output terminals are connected across the bidirectional zener diode for providing a protected output to the circuit. A second zener diode is coupled between one end of the bidirectional zener diode and a ground potential for limiting an output voltage to the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.