Monolithic overvoltage protection device

Details Monolithic overvoltage protection device Monolithic overvoltage protection device

1991-07-12

1993-09-14

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 91, 361111, H02H 904

Patent

active

052454991

ABSTRACT:
A protection device against overvoltages liable to occur between two supply terminals (A, B) comprises between the supply terminals, an avalanche triggered thyristor (6) having a determined break-over voltage (V.sub.BO) This system further comprises a zener diode (4) in parallel and reversely connected with the thyristor; the diode is selected so that its avalanche voltage (V.sub.BR) is lower than the break-over voltage of the thyristor and gets higher only for overvoltages having a higher duration or amplitude than a predetermined threshold.

REFERENCES:
patent: 4282555 (1981-08-01), Svedberg
patent: 4322767 (1982-03-01), El Hamamsy et al.
patent: 4748533 (1988-05-01), Hertrich et al.

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