fusible-link
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fusible link
Standards
a device that operates automatically at a predetermined temperature, to initiate the closure of an automatic fire-resistant roller shutter
Source - AS 1905.2-2005: Components for the protection of openings in fire-resistant walls
HB50
safety device consisting of a suitable low-melting-point material which is intended to yield or melt at a predetermined temperature
They are used to actuate a cut-off device or a release, e.g. they will hold open a fire door, fire shutter or fuel valve until they melt. Used mainly in fire protection to automatically close fire doors, fire shutters, fuel valves, and the like in the event of a rise in temperature.
See also: heat-actuated fire door <shutter>; heat-released link; fusible plug