The TCTR0603F100KF3980T with NTC Thermistors 0603 RoHS is a surface mount resistor manufactured by ResistorToday. It is an NTC thermistor with a resistance of 100 kilo-ohms at 25°C. It is a chip style thermistor model, using a 0603 package size in the similar shape of a 0805 component. It is composed of a metal film on ceramic material, which makes it RoHS compliant. The resistor has a temperature coefficient of 3980, meaning that when the temperature of its surroundings increases/decreases the resistance of the component varies accordingly. It has an operating temperature range of -55°C to 125°C with a maximum dissipation of 300mW.