System Sensor 5251H


200 Series Intelligent High Temperature Thermal Detector

Availability: Please Call for Lead Time

  • Factory New
  • Material Obsolete
Brand: System Sensor Part #: 4690 Categories: , Manufacturer Part #: 5251H


200 Series smoke detectors are intelligent (addressable) detectors with point ID capability that enable each detector address to be set with decade address switches to provide exact detector locations. The sensitivity of 200 Series detectors can be programmed using the control panel software to suit the environment. In addition, detector sensitivity is continually monitored and reported to the panel.

Both the 5251B and 5251RB detectors use an innovative thermistor sensing circuit to produce 135°F fixed and rate-of-rise thermal detection in low-profile packages. The 5251H model provides fixed high-temperature detection at 190°F. These thermal detectors provide cost-effective, intelligent property protection in a variety of applications.


Weight 1.00 lbs


Thermal Rating


Detection Method

Production Status


Product Notes

Replacement: 5351H


  • Sleek, low-profile design
  • Analog communications
  • Low standby current
  • Rotary address switches
  • Superior EMI protection
  • Dual LEDs for 360° visibility


200 Series: Intelligent Low-Profile Plug-In Detectors
Installation and Maintenance Instructions: 5251B, 5251RB, 5251H Intelligent Plug-in Temperature Sensors