Siemens FDOOTC441


Multi-Criteria Fire/CO Detector

Availability: Estimated 6 - 8 Business Days

Condition: New
Brand: Siemens
Status: Active
SKU: 54963
Manufacturer Part #: FDOOTC441
Secondary Part #: S54320-F8-A1


Model FDOOTC441 is an advanced, multi-criteria fire | CO detector that incorporates a redundant optical / thermal sensor. Additionally, Model FDOOTC441 utilizes ASAtechnology a distinctive forward / backward, light-scattering technology that provides high-tech, unparalleled fire detection to the widest range of fire types allowing the detector to distinguish non-threatening deceptive phenomena.

Additional information

Weight 0.3 lbs
Dimensions 2.00 × 4.00 × 4.00 in

Siemens Industry, Inc.




Unit of Measurement

EA (Each)

Detectable Gas

Carbon Monoxide



Detection Method

Fixed Temperature, Photoelectric, Programmable, Rate-of-Rise

Thermal Rating


Production Status



  • UL 268 7th edition Listed, ULC Listed; FM (#3230, #3210), CSFM (#7272-0067:0258) Approved
  • Built-in ISOtechnology
  • Competitive 10-year CO sensor lifetime
  • Advanced multi-criteria fire detector that has optical thermal and CO sensors
  • Differentiates between deceptive phenomena and an actual fire (nuisance-alarm avoidance)
  • Compatible with ‘H’-series devices on the same loop of Desigo Fire Safety FACPs
  • Enhanced detection via forward-and-backward light-scattering technology
  • Supervisory feature for temperature and CO-concentration-threshold monitoring
  • Complies with NFPA 76 (Telco standard) as `VEWFD’ high-sensitivity detector
  • UL Listed and FM Approved as a multi-criteria and `VEWFD’ fire detector
  • Low-temperature warning for sprinkler systems, per NFPA 25
  • UL 268A Listed for direct air-duct use (4,000 FPM)
  • UL 2075 and NFPA 72 requirements for sensitivity self-monitoring
  • Remote sensitivity-measurement capability
  • Tri-color detector-status light-emitting diode (LED) with 360 ° view
  • Polarity insensitive via SureWire
  • Responds to both flaming and smoldering-fire signatures
  • Supervisory temperature-monitoring feature
  • Automatic environment compensation
  • Meets UL, NFPA 72 requirements for sensitivity self-monitoring
  • Compatible with:
    • Model DB-11—series mounting bases
    • Model DPU (device programmer / loop tester)
  • Restriction of Hazardous Substances (RoHS compliant)


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Multi-Criteria Fire | CO Detector with ASAtechnology; Model FDOOTC441


Siemens - Data Sheet

Model FDOOTC441; Multi-Criteria Fire/CO Detector


Siemens - Installation Instructions