EPCOS / TDK HP100 NTC Thermistors

EPCOS / TDK HP100 NTC Thermistors are a series of heat pump sensors for measuring the refrigerant temperature indirectly via the pipes' surface temperature. The NTC-based sensors are specifically designed to meet automotive requirements. The standard for pipe diameters of 12.8mm, this clip-on design can operate in harsh environments from -40°C to +150°C and is water immersion resistant for up to 500 hours. The response time is less than 7s. The AEC-Q200 qualified sensors offer a high dielectric strength of 1250V AC for 10s, an important criterion for EV use. Low-temperature tolerance of ±0.3K at a nominal temperature of 85°C ensures high control accuracy.

Thanks to the clip-on technology, the sensor is very easy to mount. In addition, this technology does not require any entries into the cooling or refrigerant circuits, minimizing leakage risks. Typical applications include detecting the refrigerant temperature of heat pumps as part of the thermal management of high-voltage batteries for electric vehicles (BEV).


  • Easy mounting due to clip-on technology
  • Minimization of leakage risks due to surface temperature measurement
  • High dielectric strength of 125V AC for 10s
  • High control accuracy due to low-temperature tolerance of ±0.3K at a nominal temperature of 85°C
  • Response time is less than 7s
  • Submersible in water for up to 500 hours
Published: 2022-09-27 | Updated: 2023-07-19