i3 Series Detectors

2W-B, C2W-BA, 2WT-B, C2WT-BA, 4W-B, C4W-BA, 4WT-B, C4WT-BA
The i³™ Series photoelectric and photoelectric/ thermal smoke detectors represent a significant advancement in conventional detection, incorporating three key features: installation ease, intelligence, and instant inspection.
  • Plug-in detector line — mounting base included
  • Large wire-entry port
  • In-line terminals with SEMS screws
  • Mounts to octagonal and single-gang backboxes, 4" (101.6 mm) square backboxes, or directly to ceiling
  • Removable detector cover and chamber for easy cleaning


Electrical Specifications

  • Operating Voltage Nominal: 12/24 V non-polarized
  • Minimum: 8.5 V
  • Maximum: 35 V
  • Maximum Ripple Voltage 30% peak to peak of applied voltage
  • Standby Current 2-wire: 50 μA maximum average; 4-wire: 50 μA maximum average
  • Maximum Alarm Current 2-wire: 130 mA limited by control panel; 4-wire: 20 mA @12 V, 23 mA

Physical Specifications

  • Dimensions (including base) 5.3 inches (127 mm) diameter; 2.0 inches (51 mm) height
  • Weight 6.3 oz (178 g)
  • Operating Temperature Range 2W-B and 4W-B: 32°F to 120°F (0°C to 49°C); 2WT-B and 4WT-B: 32°F to 100°F (0°C to 37.8°C)
  • Operating Humidity Range 0 to 95% RH non-condensing
  • Thermal Sensor 135°F (57.2°C) fixed
  • Freeze Trouble 2WT-B and 4WT-B only: 41°F (5°C)
  • Sensitivity 2.5%/ft nominal
  • Input Terminals 14 to 22 AWG
  • Mounting 3½-inch octagonal back box
  • 4-inch octagonal back box
  • Single-gang back box
  • 4-inch square back box with a plaster ring
  • Direct mount to ceiling

Agency Listings and Approvals

  • UL/ULC
  • FM Approved
  • CSFM
  • FDNY


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Document Name Asset Type Type & Size Modified Date
Data Sheets pdf | 0.21MB 09/06/2016