Genuine Dyze Design Bead thermistor 500°C (DDK-00789)

Thermistor are resistor whose resistance changes with temperature. Most commonly used type in 3D printers is NTC, standing for “Negative Temperature Coefficient”. When the temperature increase, the resistance decrease.

They are made from semiconductors, mostly silicon and germanium, and their resistance value can vary by many order of magnitude in their temperature range. A 100k NTC thermistor has a resistance of 100kΩ (100 000Ω) at room temperature (20°C) and drops as low as 100Ω at 300°C.