PTC Thermistor Relay - 110-240 V AC, 1 C/O is a PTC thermistor relay designed for motor and transformer over-temperature protection. It monitors integrated PTC resistor sensors and provides one changeover relay output with auto, manual, and remote reset options.
🔧 Technical Highlights:
- Product type: PTC thermistor relay
- Supply voltage: 110-240 V AC, 50/60 Hz
- Output: 1 C/O relay contact
- Sensor input: PTC thermistor sensor chain
- Trip level: 2.7 kΩ +/- 5%
- Reset level: 1.71 kΩ +/- 5%
- Contact rating: 5 A resistive at 250 V AC / 28 V DC
- Mounting: DIN rail, 22.5 mm housing
✅ Benefits:
- Helps protect motors and transformers from over-temperature conditions.
- Supports alarm or trip circuits through a defined changeover relay output.
- Detects sensor open and short conditions for easier fault diagnosis.
- Offers reset options for automatic, local manual, or remote reset operation.
🚀 Applications:
- Motor winding temperature protection
- Transformer temperature monitoring
- Machine protection circuits
- Industrial control panels
MJ81BK provides PTC thermistor relay protection for dependable motor and transformer temperature monitoring.
FAQs
- Q: What is the MJ81BK used for?
A: It monitors PTC thermistor sensors in motors, transformers, or machinery and switches its relay output when an over-temperature condition is detected. - Q: What is the main selection detail for MJ81BK?
A: The key selection detail is a 110-240 V AC PTC thermistor relay with one 1 C/O relay output.