PTC Resettable Fuses are advanced circuit protection devices designed with a positive temperature coefficient (PTC) material that significantly increases resistance during overcurrent and overtemperature conditions. When a fault occurs, the fuse’s high resistance limits the current flow, protecting the circuit from damage. Once the overtemperature source is removed and conditions normalize below the design current/temperature limits, the fuse resets to its conductive state, allowing the circuit to resume normal operation.