UTC (Formerly GE Security/ESL) 541NBXT 4-Wire Photoelectric Smoke Detector, Heat

  • MPN: 541NBXT
  • JMAC ID: 200084346
$42.25
JMAC_ID:
200084346
df_manual_boost:
1.75
Please Note: In order to keep our prices low, we have a minimum order requirement of $99
UPC: 046188094523
Also known as: ES-541NBXT, GES-541NBXT


The UTC 541NBXT self-diagnostic, 4-wire smoke detector is a conventional direct-wire smoke detector with analog features such as a heat sensor, drift compensation, and multi-criteria detection.

The 541NBXT continually monitors its own sensitivity and operational status, and provides a visual and remote trouble condition if the unit drifts out of the sensitivity range or fail internal diagnostics.

The 541NBXT is equipped with both a rate-of-rise and fixed temperature sensor and operates on 6.5 - 33 VDC.


Also known as: ES-541NBXT, GES-541NBXT

Technical Specifications:
  • Listings: 511 UL 268
  • Reset time: 1 second minimum
  • lMounting dimensions: 5.25 in. (133 mm) dia.; 0.3 in. (8 mm) high
  • Detector head dimensions: 5.5 in. (140 mm) dia.; 2 in. (50 mm) high
  • Drift compensation adjustment: 1.0%/ft. max
  • UL 2-wire compatibility identifiers: S10A, S11A
  • Field wiring size: 12-24 AWG
  • Color: White head and base
  • RFI immunity: 20V/m minimum; 1-1000MHz
  • Operating humidity range: 0 to 95% non-condensing
  • Operating termperature: 32° to 100°F (0° to 37°C)
  • Photoelectic sensitivity: 3.1% + 0.5 - 1.0%
  • Alarm contacts: 500mA @ 36VDC (resistive)
  • Aux. relay contacts: 2A @ 30VDC
  • Typical alarm current (12/24V): up to 60mA max. if not limited by control panel
  • Typical average standby current: 70 uA (12/24V)
  • Maximum ripple: (pk to pk) 10% (V p-p)
  • Power Supply: 12/24 V operation: 8.5 to 33 VDC polarity sensitive


For more information about the UTC (Formerly GE Security/ESL) 541NBXT, please contact us.
  • Patented CleanMe feature
  • Large SEMS Screw Terminals Accept 12-18 AWG Wire
  • Small, Low Profile Design Blends w/Any Environment
  • Photoelectric
  • Heat sensor
  • 4-wire
  • Built-in sounder available in two- and four-wire models
  • Built-in dust compensation
  • Field-replaceable optical chamber
  • World’s Only Replaceable Optical Chamber Makes Any Required Cleaning a Snap
  • Self-diagnostics Meets NFPA 72 Sensitivity Testing Requirements without the Need for External Meters

2 Reviews

  • 5
    UTC-GE-ESL-541NBXT

    Posted by 133271 on Oct 18th 2018

  • 5
    UTC-GE-ESL-541NBXT

    Posted by 117242 on Sep 8th 2017

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