PTC Thermistor Current Protection Resettable Fuse

PTC Thermistor Current Protection Resettable Fuse

PTC Thermistor Current Protector Resettable Fuse are ceramic-based doped barium titanate PTC thermistors discs, in through-hole rugged design, used to protect transformers instruments  power supply against overcurrent overload and short circuit,  for circuit protection inrush current limit function, by utilizing ceramic PTC thermistors thermal property that resistance increases sharply at Curie Temperature (also called Switch Temperature), reduces the current flow to the load to an admissible low level.

PTC thermistor over-current protector limits the power dissipation of the whole circuit by increasing their resistance and thus reducing the current to a harmless residual value.

In contrast to conventional fuses, PTC thermistor resettable fuses do not have to be replaced after elimination of the fault but resume their protective function immediately after a short cooling-down time.

For more information on its Operating Principle, Application circuit diagram, datasheet, please visit AMWEI PTC Thermistor Current Protector Resettable Fuse.