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Difference between NTC thermistor and PTC thermistor | NTC thermistor vs PTC thermistor

This page compares NTC thermistor vs PTC thermistor and mentions difference between NTC thermistor and PTC thermistor.

Introduction:
• A thermistor is semiconductor device whose resistance changes based on temperature change.
• It is also referred as thermal resistor.
• They are available in various sizes and shapes such as rod, disc and bead shaped.

NTC Thermistor

• NTC stands for Negative Temperature Coefficient.
• In NTC thermistor, resistance decreases as its temperature increases as shown in the figure.
• NTC thermistors are made using oxides of nickel, cobalt, copper, manganese and other materials.
• They are mainly employed for temperature control and measurement applications.
• NTC thermistors are used for temperature range from -55oC to 200oC.
• Example: SMD KT series NTC thermistor chips manufactured by ATC Semitec Limited

NTC thermistor vs PTC thermistor,difference between NTC thermistor and PTC thermistor

PTC Thermistor

• PTC stands for Positive Temperature Coefficient.
• In PTC thermistor, resistance increases as its temperature increases as shown in the figure.
• PTC thermistors are made using barium titanate.
• They are used to protect electronic circuits from high temperatures.
• PTC thermistors are used for temperature range from 0oC to 200oC.
• Example: SMD PTC thermistors (TPM series) manufactured by ATC Semitec Limited used as thermal switches

Also refer thermistor basics and manufacturers >> and difference between Thermocouple vs RTD vs thermistor >> for more information.


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