Two-pole overcurrent protection device

Details Two-pole overcurrent protection device Two-pole overcurrent protection device

1983-05-23

1985-04-02

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 58, 361 91, 307252C, 307252T, 307305, 357 39, 357 38, H02H 308, H03K 1772

Patent

active

045090890

ABSTRACT:
A two-pole overcurrent protection device comprises an integrated circuit with a thyristor having an emitter layer and base layer which, on the cathode side, is connected to the emitter layer on the cathode side by means of a normally non-conducting MOS transistor. The on-state voltage across the thyristor is supplied to the control electrode of the transistor via a Schottky diode, whereby, at a certain thyristor current, the thyristor is made conducting and short-circuits the cathode-emitter junction. The edge of the Schottky diode is arranged adjacent to the cathode base layer and at such a distance therefrom that the barrier layer at the center junction of the thyristor penetrates into the diode and limits the voltage on the control means of the MOS transistor to a harmless value.

REFERENCES:
patent: 3263128 (1966-07-01), White
patent: 4224634 (1980-09-01), Svedberg
patent: 4244000 (1981-01-01), Ueda et al.
patent: 4331884 (1982-05-01), Svedberg

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