Circuit protection devices comprising PTC element

Details Circuit protection devices comprising PTC element Circuit protection devices comprising PTC element

1982-09-20

1984-10-02

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Impedance insertion

361106, 338 22R, H02H 308

Patent

active

044751389

ABSTRACT:
Circuit protection devices which comprise conductive polymer PTC elements and which will provide repeated protection against sudden increases in current to high levels, e.g. 5 amps or more, in circuits which operate at, or are subject to fault conditions arising from, voltages greater than 100 volts, e.g. mains supply voltages. A particularly valuable use of the devices is in the protection of circuitry in telecommunication apparatus which normally operates at battery voltages, e.g. up to 75 volts, but which can be accidentally subject to voltages above 120 volts.

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"Current Protectors Take on Surges Without Resetting or Replacement", by George Ballog, Electronics/Jan. 13, 1981, pp. 159-162.

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