Fusible link

Details Fusible link Fusible link

1986-06-06

1987-03-24

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337 4, 337405, 361104, 361402, H01H 8504, H02H 720

Patent

active

046528482

ABSTRACT:
A fusible link for an electrical circuit consists of a length of fusible material which closely fits an aperture through a ceramic printed circuit board. Ends of the fusible element electrically contact respective electrical leads on opposed surfaces of the board. A resistive film forming part of the electrical circuit is located close to the fusible link site so that when overvoltage conditions exist the resistive film heats the circuit board until eventually the fusible material melts, flows out of the aperture and the electrical circuit is broken. The fusible link is soldered and/or swaged into position and projects beyond the surface of the circuit board so that when the solder melts, surface tension forces tend to pull the solder out of the aperture.

REFERENCES:
patent: 4031497 (1977-06-01), Ozawa
patent: 4379318 (1983-04-01), Ootsuka

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