MZ6 PTC Thermistor – Positive Temperature Coefficient Sensor
The MZ6 is a positive temperature coefficient (PTC) thermistor designed for over-temperature protection in motors, transformers, and power electronics . When temperature approaches the nominal switching temperature (T_n), resistance increases sharply from ~150Ω at 25°C to over 1650Ω at T_n, triggering a protection relay to cut off power and prevent damage .
✅ Specifications:
Resistance at 25°C: 150Ω ±20%
Switching Temperature (T_n): 60°C to 180°C (varies by model)
Resistance at T_n: ≥1650Ω
Electrical Isolation: ≥2.5kV
Max Measurement Current: 2.5mA
Response Time: 3-5 seconds
Standards: DIN 44081 / DIN 44082 compliant
📦 Features:
✔️ Sharp resistance increase at nominal switching temperature for precise overheat detection
✔️ Small size – can be embedded directly into motor windings
✔️ Long-term stability and high reliability
✔️ Self-resetting – automatically recovers when temperature drops
✔️ No recalibration needed after trip event
📦 Applications:
✔️ Over-temperature protection for electric motors and generators
✔️ Transformer and power inductor thermal monitoring
✔️ Power switching devices and IGBT modules
✔️ Battery packs and chargers
✔️ Industrial automation equipment
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