Fanox PTC Sensor

Fanox PTC – Thermistor Sensor Relay | Motor Overtemperature Protection

SKU FANOX-PTC
Fanox PTC thermistor relay protects motors against overtemperature. Positive Temperature Coefficient sensors, 120°C/160°C thresholds. PTCEX 70 for external mounting.
DIN Rail CE Certified
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Fanox PTC – Thermistor Sensor Relay

The Fanox PTC relay protects electric motors and machines against overtemperature using Positive Temperature Coefficient (PTC) thermistor sensors embedded in motor windings. When winding temperature exceeds the preset threshold, the relay trips to prevent insulation damage and motor burnout.

  • PTC (Positive Temperature Coefficient) thermistor technology
  • Standard temperature threshold: 120°C (PTC) and 160°C (PTC high temp)
  • PTCEX 70 variant for external mounting: threshold 70°C
  • Protects motors, transformers, and other electrical machines against overtemperature
  • Simple wiring — connects directly between motor winding sensors and control circuit
  • DIN rail mounting

PTC thermistor relays are essential in environments with high ambient temperatures, frequent start-stop cycles, or poor ventilation where conventional overload relays cannot detect winding hot spots.