Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1989-05-02
1989-12-12
Jennings, Derek S.
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
361127, 338 21, H02H 100
Patent
active
048871826
ABSTRACT:
A circuit protection device for protecting an electrical circuit from a voltage transient, e.g. a voltage transient caused by an electrostatic discharge, lightning or a nuclear electromagnetic pulse, comprises a threshold switching element formed from an amorphous composition comprising germanium, selenium and optionally antimony, and a pair of electrodes in contact with the composition. The devices generally exhibit a good balance of physical properties including switching speed, energy required to latch them in their low resistance state, high resistance state (off) resistance, threshold voltage and capacitance, which enables them to be used successfully to protect electrical circuits from such transients.
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Burkard Herbert G.
Jennings Derek S.
Lyons Bernard J.
Raychem Limited
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