Method and a device for protecting a printed circuit board again

Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated

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337295, 29623, H01H 8504, H01H 6902

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active

055437745

ABSTRACT:
In order to reduce the costs of assembled printed circuit boards, a printed board fuse functions with great reliability at low manufacturing costs. By coating a large area of a printed board with metal, for example, by plating, a well-defined thickness of a metal layer may be achieved in which a fuse has been separated. The well-defined thickness also allows well-defined geometry of the fuse cross-sectional area and fuse length to be achieved and therefore its resistance and interruption characteristics will also be very accurately defined. In case of a temperature rise, the metal layer surrounding the fuse will have a heat dissipating effect on the fuse, providing a substantially reduced risk of board fire.

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