Jackson Systems

BRK 9120B – 120V AC/DC Smoke Alarm (ION) Battery back-up



MSRP: $14.89
You save 15%

120V AC/DC ION Smoke Alarm with Battery Back-Up


Ships By June 22


The BRK 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.

Designed to help promote household safety, the BRK Hardwired Smoke Alarm with Battery Backup can provide early warning of fire. This hardwired smoke detector uses an ionization smoke sensor to reliably detect smoke from hot, fast-flaming fires.

  • 120-volt hardwired smoke alarm wires directly into your home’s electrical system
  • Ionization smoke sensor reliably detects particles from fast-flaming fires
  • Can integrate with up to 12 other First Alert or BRK hardwired smoke detectors
  • Easy-to-access battery drawer; 9-volt battery included
  • Hassle-free installation, no need to rewire
Hassel-Free Easy Installation

To facilitate hassle-free installation, this fire and smoke alarm features a streamlined mounting system with a gasket-less base. The mounting bracket keeps the detector secure over a wide rotation range while maintaining perfect alignment. The ionization fire alarm also comes with a dust cover to keep the unit clean during construction. AC-powered smoke alarms must be installed in accordance with all local electrical codes.

Battery Backup for Detection During a Power Outage

This smoke alarm is designed for hardwired installation, but it also features a battery backup that helps ensure continued functionality in the event of a power outage. The smoke and fire detector comes with a 9-volt battery and features a pivoting, easy-to-access battery drawer that allows you to replace the battery without dismounting the hardwired alarm.

Works in Tandem with Other First Alert Alarms

In addition to functioning independently, this hardwired ionization smoke alarm can also integrate with up to 12 other First Alert or BRK hardwired alarms for coverage of larger spaces. This detector also integrates with up to six other compatible devices, such as bells, horns, and repeaters. If one alarm in the series is triggered, they will all sound. The fire alarm features a latching indicator to identify which unit triggered the alarm, alerting you to the area of danger.

  • Product Type: Smoke Alarm
  • Sensor Type: Ionization
  • Power Supply: Hardwired
  • Current Type: AC, DC
  • Battery Backup: Yes
  • Backup Battery Size: 9V
  • Battery Replaceable: Yes
  • Hardwired Interconnectivity: Yes
  • Wireless Interconnectivity: No
  • Warranty: 10 Years Limited
  • Alarm Dimensions: 5.6″ Diameter x 2.0″H
  • Weight: 7.8 oz
  • Operating Voltage: 120V AC 60Hz w/ 9V battery backup
  • Operating Current: 0.04 amps (standby/alarm)
  • Temperature Range: 40°F (4°C) to 100°F (38°C)
  • Humidity Range: 10% to 95% 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.
  • Smoke Sensor: Dual Ionization
  • Indicator Lights/Sounds:
    • AC Power: Constant Green LED
    • DC Power: Intermittent Red 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

Additional information

Battery Backup


Power Source

Trades Elite Exclusive



UPC 029054513014
Imprinting Available Yes



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