BRK 120-Volt Hardwire Ionization Sensor Smoke Alarm with Battery Backup (6-Pack)-9120B6CP - The Home Depot


Model # 9120B6CP

Internet # 203524007

120-Volt Hardwire Ionization Sensor Smoke Alarm with Battery Backup (6-Pack)

BRK 120-Volt Hardwire Ionization Sensor Smoke Alarm with Battery Backup (6-Pack)

This item has been discontinued.
The Home Depot no longer carries this specific product.

$62.99 / each


Model # 9120B6CP

Internet # 203524007

BRK’s Hardwire Ionization Sensor Smoke Alarm detects flaming fires and runs on a battery backup when your power is out. This alarm will sound if it detects smoke even during power outages. It is made for hardwire installation and uses a 9 Volt backup battery. The ionization sensor detects fast flaming fires that consume combustible materials. Other features include a test and silence button, a latching indicator that remembers which unit initiated the alarm and smart technology that helps reduce false alarms. The 9120B can be connected to (18) devices including, (12) compatible smoke alarms and (6) compatible devices like bells, horns, repeaters and door closers. If one unit triggers an alarm, all smoke alarms in the series will sound. The 9120B features a perfect mount system with a gasket-less base for easy installation, a new mounting bracket that keeps the alarm secure over a wide rotation range for perfect alignment and a mounting bracket lock for tamper resistance. A dust cover keeps the unit clean during construction. Engineered for residential and institutional use, this detector is perfect for dormitories and multi-family dwellings. BRK’s Hardwire Ionization Sensor Smoke Alarm is warranted to the original purchaser for a period of 10-years. First Alert invests time and research into providing dependable and hardworking products. Committed to innovation and value, First Alert improves safety in and around the house.

  • Detects flaming fires and runs on a 12-Volt battery backup during outages
  • Can connect to (12) smoke alarms and (6) devices like bells, horns and more
  • Perfect mount system with gasket-less base for easy installation
  • Features a test button, latching indicator and smart technology that helps reduce false alarms
  • Rated for 120-Volts, 60-Hz and has a standard white finish
  • Measures 5.59 in. by 5.69 in. by 5.69 in. and weighs 0.6 lbs
  • Comes in a contractor’s 6-pack
  • Includes batteries
  • 10-Year limited warranty

Info & Guides

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Assembled Depth (in.)  5.6 in  Assembled Height (in.)  5.6 in 
Assembled Width (in.)  1.9 in 
Alarm Sensor Type  Ionization  Alarm Type  Smoke 
Alarm/Detector Features  Battery Back-Up  Battery Back-Up  Yes 
Battery Power Type  Alkaline  Battery Size  9-volt 
Commercial / Residential  Commercial / Residential  Connector/Contact Type  4-Wire 
Electrical Product Type  Smoke Detector  Hazardous Code  null 
Included  Batteries  Power Source  Hardwired 
Returnable  90-Day  Voltage (volts)  120 
Warranty / Certifications
Certifications and Listings  No Certifications or Listings 


Rated 4.8 out of 5 by 9 reviewers.
Rated 5 out of 5 by Easy replacement alarm Had to replace 10 BRK alarms at once as they had hit their 10 year mark and we had a home inspection in advance of a sale. Trying to replace our original BRK alarms with Kidde alarms was both time-consuming and expensive due to extra connection parts needed as well as different harnesses. These alarms provided the easiest installation with existing BRK harnesses. Nice that they include batteries too and a great value as a six-pack vs. in-store individual units. July 15, 2014
Rated 5 out of 5 by The Perfect Replacement Product This was a replacement for the smoke detectors that came with my home purchase in 1999. I was able to to find the correct part on the web site very easily. Received the product very promptly, and installation was very easy with a simple screw driver which I appreciated since a couple of the detectors were up near the top of 12 foot ceilings. Very Satisfied! July 15, 2014
Rated 4 out of 5 by As advertised Inexpensive plug and play replacement for my old BRK hard wired units. Easy to install. Came up as expected. Reasonable quality. July 22, 2014
Rated 5 out of 5 by smoke detectors replaced old ones. easy to do. even came with batteries June 11, 2014
Rated 4 out of 5 by Good price and ten year guarantee. Securing method poor. Good price and ten year guarantee. Would have been better to include plastic screw anchors and metal screws to attach the detector base to the wall rather than the short plastic "hammer-in" retainers that provide a tenuous hold in drywall. May 6, 2014
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