TMP61 Silicon-based linear thermistor with a positive temperature coefficient (PTC) |

TMP61 (ACTIVE) Silicon-based linear thermistor with a positive temperature coefficient (PTC)



The TMP61 series of small silicon linear thermistors are designed for temperature measurement, protection, compensation, and control systems. Compared to traditional NTC thermistors, the TMP61 device offers enhanced linearity and consistent sensitivity across the full temperature range. The TMP61 offers robust performance due to device immunity to environmental variation and built-in fail-safe behaviors at high temperatures. This device is 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, and a low profile 2-pin SOT-5X3 package.


  • 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
  • 10-kΩ nominal resistance at 25°C (R25)
    • ±1% maximum (0°C to 70°C)
  • Consistent sensitivity across temperature
    • 6400 ppm/°C TCR (25°C)
    • 0.2% typical TCR tolerance across temperature (–40°C to 125°C)
  • Wide operating temperature:
    • –65°C to +150°C
  • Fast thermal response time:
    • 0.6 second for 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)
    • SOT-5X3 (DYA) (contact representative for availability)

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