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BRK Electronics First Alert 1839N12R 120V AC Hardwire Ionization Smoke Alarm, No Battery Back Up
BRK Electronics First Alert 1839N12R 120V AC Hardwire Ionization Smoke Alarm, No Battery Back Up


This item has been discontinued from the manufacturer. Please click here for possible replacement. Rewiring and changing mounting bracket are required.

Our Price: $18.48

Model: BRK-1839N12R

Technical Spec Downloads
Technical Spec

The 9120 Series smoke alarms have been designed to install faster, perform better and be even smarter than before. These improvements help reduce nuisance alarms and save you time and money.

  • Single button test/silence
  • Latching alarm indicator - remembers which unit initiated an alarm
  • Smart Technology - helps reduce the number of nuisance alarms
  • Perfect Mount - allows for easy alignment of alarm
  • Dust Cover
  • Easy Installation/Maintenance - Preferred features include a large opening in the mounting bracket for easy access to wiring. Keyhole slots in the mounting bracket eliminate the need to remove the electrical box screws for installation. Locking feature provided to prevent theft of the unit. Connection to AC power is made with a "Quick-Connect" wiring harness. Installation is quick, easy and cost effective.
  • 10-Years Limited Warranty
Model # 9120
Weight 6.5 oz
Dimension 5.6" dia x 2.0"H
Operating Voltage 120V AC 60Hz
Operating Current .04 amps (standby/alarm)
Temperature Range 40°F (4°C) to 100°F (38°C)
Humidity Range 10% to 90% relative humidity (RH)
Audio Alarm 85dB at 10 feet
Test/Silence Electronically simulates smoke condition, causing the unit to alarm
Press and hold test/silence button
Alarm Reset Automatic when smoke clears
Interconnections Up to 18 units of First Alert or BRK Smoke, CO and Heat Alarms. Maximum of 12 smoke alarms. See user's manual for details.
Smoke Sensor Dual chamber ionization
Indicator Lights/Sounds
  • AC Power: Constant Green LED
  • Local Alarm: Red LED flashes rapidly
  • Remote Alarm: Red LED out.
  • Latching Alarm: Green LED flashes 2 sec. on/2 sec. off after local alarm
Listing Listed to UL217 Standard

BRK 9120 diagram

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