X-Fuse’s Polymeric PTC Resettable Fuse is composed of Carbon and Polymer, produced by a series of innovative manufacturing process.

Normal status :
Low resistance, allows electricity to flow through.
 

When short/over current :
PPTC heats up and results in High resistance, consequently limits the fault current.

Auto Reset ：After fault current being removed or equipment reset, PPTC cools down and back to Low resistance, allows electricity to flow through again.