NTC (Negative Temperature Coefficient) sensor, also known as negative temperature coefficient thermistor, is a semiconductor temperature sensitive component whose resistance decreases exponentially with increasing temperature.

Features:
1.  High sensitivity: The temperature coefficient is about -2%~-6%/℃, much higher than that of platinum resistors (Pt100 is about 0.385%/℃), and can detect small temperature changes of * * 0.1 ℃ * *.
2. Fast response speed: Small thermal capacity, response time can reach milliseconds to seconds.
3. High accuracy: The conventional accuracy is ± 0.5 ℃~± 1 ℃, and the high-precision model can reach * * ± 0.1 ℃ * *.
4. Compact size: available in patch type (0402/0603 package) and micro lead type, suitable for space constrained scenarios.
5. Low cost: simple structure, high cost-effectiveness, suitable for large-scale applications.
6. Good stability: under proper packaging (epoxy, glass), the long-term drift is small and the aging resistance is good.
7. Nonlinear: The resistance temperature relationship is exponential and needs to be linearized using a table or Steinhart Hart equation.

Applications:
1. Consumer electronics
    Mobile phone/laptop: Monitor battery and CPU temperature, overheat protection, temperature control and frequency reduction.
    Home appliances: temperature detection and control of air conditioners (indoor/pipe temperature), refrigerators, rice cookers, and electric water heaters.
2. New energy vehicle
    Power battery: Real time monitoring of battery cell temperature in BMS system to prevent thermal runaway.
    Motor/Electronic Control: Monitor the temperature of windings and inverters.
3. Industrial control
    Temperature measurement and control of equipment, pipelines, and reaction vessels.
    Over temperature protection for power supply and frequency converter.
4. Medical equipment
    High precision temperature measurement using electronic thermometers, incubators, and blood bank refrigerators.
5. Communication equipment
    Temperature monitoring and compensation for base stations, servers, and optical modules.
6. Other
    Temperature compensation (such as crystal oscillators, sensors).
    Surge current suppression (power supply startup current limit).