In selecting PTC thermistor Resettable Fuse for overcurrent and overload protection, following 5 factors should be taken into consideration.
1) Maximum operating voltage
2) Rated current ( Non-trip current) and Switching current (Trip current)
3) Maximum current permissible in maximum operating voltage
4) Selection of PTC thermistor Reference Temperature (also called Switch temperature or Curie temperature)
Reference Temperature optional for 80 ℃, 100 ℃, 120 ℃, 140 ℃.