120 ohm Positive Temperature Coefficient (PTC) Thermistor
NTE’s PTC thermistors are small sized radial lead organic silicon resin thermistors designed for over current and overload protection.

Sold as a package of 5 pieces

Protects :
- Transformer primary loops, chargers, telecom equipment, multi-meters

Manufacturer datasheet - 02P121-1 (Adobe Reader required to read datasheet)

What is the difference between a NTC and PTC Thermistor:
NTC thermistors decrease in resistance as the temperature increases
PTC thermistors increase in resistance as the temperature increases