Negative Temperature Coefficient (NTC)
makerA negative temperature coefficient (NTC) is a property of certain materials where resistance decreases as temperature increases.
expanded
An NTC thermistor is a type of resistive device that exhibits a decrease in electrical resistance as its temperature rises, commonly used for temperature sensing and current limiting applications. This material property is critical in various electronic applications that require precise temperature monitoring, such as those found in HVAC systems and automotive engine controls. NTC thermistors typically feature a resistance range that varies significantly with temperature, making them suitable for use in detailed thermal measurements.
examples
An NTC thermistor used in a refrigerator's temperature control system ensures accurate temperature readings.
In this application, the NTC thermistor maintains the required interior temperature of the refrigerator by adjusting the cooling system based on changes in resistance correlated with temperature variations.
NTC thermistors used in overcurrent protection for power supply circuits.
These thermistors are placed in series with the load, where they limit current by initially presenting high resistance, and then lower their resistance as they warm up, thus preventing damage to the circuit due to excessive current.