We fit these self-resetting fuses during service when a controller is returned with only a fuse track blown.
They are in fact a PTC (positive temperature coefficient) resistor that suddenly increases in resistance when a high current flows (fault conditions) and overheats it. When the current reduces, the device cools down and resets.
They are recommended if you want to protect against control wiring faults or to repair a blown fuse track on board. If the fault remains or recurs – the fuse will be (very) hot to touch.
|Trip current||1.5a max|
|Reset current||0.75a max|
|Max operating voltage||60v|
12mm disc with leads to solder across blown fuse (track).