This is a homebrew self-repairing 5A fuse which uses a PPTC or PolyFuse. I’ve also added an indicator lamp which shows when the fuse has blown.
The fuse doesn’t actually blow; it just flips from a low resistance to a high resistance when its temperature reaches a certain point.By removing the high current path, the fuse cools down and its low resistance is restored.
Post time: Jan-18-2017