Fuse (electrical)

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A miniature time-delay 250 V fuse that will interrupt a 0.3 A current at efter 100 s, tae a 15 A current in 0.1 s. 32 mm (1 1/4") lang.
Wirkin principleMeltin o internal conductor due tae heat generatit bi excessive current flow
Electronic seembol
Electronic symbols for a fuse

In electronics an electrical ingineerin, a fuse is an electrical safety device that operates tae provide owercurrent protection o an electrical circuit includin the soorce o pouer an the laid. Its essential component is a metal wire or strip that melts when ower muckle current flows throu it, tharebi interruptin the current. It is a sacrificial device an ance a fuse haes operatit it is an open circuit, an it must be replaced or rewired, dependin on teep.