Thermistors - PTC

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TMP61/TMP61-Q1 Silicon Linear Thermistors have a linear positive temperature coefficient (PTC) that results in a uniform, consistent temperature coefficient resistance (TCR) across a wide operating temperature range. These devices are designed for temperature measurement, protection, compensation, and control systems. Compared to traditional NTC thermistors, the TMP61/TMP61-Q1 offers enhanced linearity and consistent sensitivity across the full temperature range. They also have robust performance due to their immunity to environmental variation and their built-in fail-safe behavior at high temperatures. These devices are currently available in a 2-pin, surface-mount, 0402 footprint-compatible X1SON package and a 2-pin, through-hole, mini-sized transistor-outline TO-92S package. The TMP61-Q1 devices are AEC-Q100 qualified for automotive applications.


  • Silicon-Based Thermistor With a Positive Temperature Coefficient (PTC)
  • Linear Resistance Change With Temperature
    • Simplifies Resistance-to-Temperature Conversion
    • Decrease Accuracy Spread Compared to Non-Linear Negative Temperature Coefficient (NTC) Thermistor-Based Circuits Across a Wide Temperature Range
  • 10kΩ Nominal Resistance at 25°C (R25)
    • ±1% Maximum (0°C to 70°C)
  • Consistent Sensitivity Across Temperature
    • 6400ppm/°C TCR (25°C)
    • 0.2% Typical TCR Tolerance Across Temperature (-40°C to 125°C)
  • Wide Operating Temperature
    • –65 to +150°C
  • Fast Thermal Response Time
    • 0.6s (DEC package)
  • Long Lifetime and Robust Performance
    • Ultra low power consumption compared to traditional NTCs that lower errors due to self-heating
    • Built-in fail-safe in case of short circuit failures
    • <1% Maximum Drift after high temperature and high humidity stress tests
  • Available Package Options
    • X1SON (DEC/0402 Footprint)
    • TO-92S (LPG)


  • Temperature Measurement And Monitoring
  • Thermal Compensation
  • Thermal Protection (With Comparator)