PTCs as Resettable Current Fuses

Ceramic PTC thermistors are often used as re-settable current fuses as they can offer several benefits over conventional fuses. Over-voltage or over-current conditions cause the PTC protector to "switch" from a low resistance to a high resistance state, effectively limiting (i.e. switching off) the through current.

For more information on PTCs as Resettable Current Fuses talk to ATC Semitec Ltd