PTC Resettable Fuses are available at Tenco Electronics. A Resettable Fuse is a polymeric positive temperature coefficient device that is a passive electronic component used to protect against overcurrent faults in electronic circuits. The device is also known as a polyfuse or polyswitch. They are similar in function to PTC thermistors in certain situations but operate on mechanical changes instead of charge carrier effects in semiconductors. Tenco offers inventory, pricing, & datasheets for PTC Resettable Fuses. To know more, please view our large section of Circuit Protection -PTC Resettable Fuses below.