Solid state replacement for a mechanical relay

Details Solid state replacement for a mechanical relay Solid state replacement for a mechanical relay

1975-05-23

1977-02-08

Hohauser, Herman J.

Electrical transmission or interconnection systems

Switching systems

307203, 307252J, H03K 1912

Patent

active

040073785

ABSTRACT:
A direct replacement for mechanical relays without requirement for modification of associated circuitry and circuit connections. A standard relay base having a standard relay pin configuration is utilized for mating with a standard relay socket connected to the associated circuit. A control circuit is mounted on the base and connected to the relay pins and the base. A cover is provided which fits over the base and contains the control circuit. The cover has externally accessible cover terminals mounted therein connected to the control circuit. A remote heat sink is provided for mounting remotely from the relay base and socket for carrying a solid state triac device having a gate and first and second main terminals connected by electrical conductors to the cover terminals. The control circuit is configured to receive a command input signal and a power input signal. The command input signal enables the control circuit, so that the power input signal provides a trigger output coupled to the triac gate. In this fashion, the command input signal controls current between the first and second main terminals of the triac when a load voltage is impressed thereacross.

REFERENCES:
patent: 3371227 (1968-02-01), Sylvan
patent: 3774051 (1973-11-01), Chandler, Jr.
patent: 3890512 (1975-06-01), Kumakawa et al.

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