High powered over-voltage protection

Details High powered over-voltage protection High powered over-voltage protection

1980-08-13

1982-05-25

Albritton, C. L.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

252516, 361127, H01C 710

Patent

active

043319483

ABSTRACT:
The overload protection material of this invention comprises a plastic preferably an elastomer, e.g. silicone rubber, homogeneously and highly loaded with silicon carbide particles (powder) and a lesser amount of a Group IV B element-carbide particles (powder). The material is preferably form stable and is placed (across) a semiconductor junction or between electrodes of a device to be protected so that when high voltage surges appear across the junction or device to be protected the material breaks down (conducts) before the junction or device is destroyed. The material is bidirectionally conductive in its voltage threshold characteristic and repeatedly recovers unlike a fuse so that it provides continuous high voltage over-voltage (e.g. surge) protection.

REFERENCES:
patent: 2329085 (1943-09-01), Ridgway
patent: 3210460 (1965-10-01), Suelmann
patent: 3210461 (1965-10-01), Berg et al.
patent: 3412200 (1968-11-01), Virsberg
patent: 3743996 (1973-07-01), Harnden, Jr.
patent: 3896480 (1975-07-01), Harnden, Jr.
patent: 3950604 (1976-04-01), Penneck
patent: 4074221 (1978-02-01), Milligan
patent: 4103619 (1978-08-01), Fletcher

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