0029054513014

BRK

Model # 9120B

Internet # 100065881

Hardwired Interconnected Smoke Alarm with Battery Backup

$12.21 /each
  • Ionization smoke sensor
  • Tamper resistant locking pins
  • Hardwired with battery backup

FREQUENTLY BOUGHT TOGETHER

PRODUCT OVERVIEW

Model # 9120B

Internet # 100065881

The BRK 9120B 120-Volt AC Smoke Alarm with Battery Backup is designed to install faster, perform better, and be even smarter than before. This alarm is 120-Volt AC inter-connectable (with maximum 18 compatible devices), which lets the alarm be interconnected with up to 12 other compatible smoke alarms and six compatible devices like bells, horns, repeaters, and door closers to network a comprehensive system for your home. If one unit triggers an alarm, all smoke alarms in the series will sound. The 9120B includes an ionization sensor which helps detect fast flaming fires that consume combustible materials rapidly. The dust-reducing packaging helps avoid accidental alarms due to contaminants and the 85 dB horn can be inspected with a test button. This unit includes a quick-connect wiring harness for easier installation to your household current and 9-Volt battery backup ensures protection even during power outages or service interruptions. 10-year limited warranty.

  • 120V AC smoke alarm with battery backup
  • 85 dB horn sounds as smoke reaches dangerous levels
  • Can be interconnected with 12 additional BRK and First Alert smoke alarms and 6 compatible devices such as heat alarms for a complete safety system
  • Dust-blocking covers to reduce nuisance alarms associated with particulate contamination
  • Locking pins deter removal
  • A single button tests units functionality and silences nuisance alarms
  • 9-Volt battery backup ensures operation during household current interruption
  • Power indicator lets you see at a glance that the alarm is powered
  • Universal mounting bracket with wide opening for easy wire access
  • Meets UL standards

Info & Guides

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SPECIFICATIONS

Dimensions
Product Depth (in.) 
Product Height (in.) 
5.63 
Product Width (in.) 
5.5 
Details
Alarm Sensor Type 
Ionization 
Alarm Type 
Smoke 
Alarm/Detector Features 
No Additional Features 
Commercial / Residential 
Commercial / Residential 
Connector/Contact Type 
4-Wire 
Included 
Batteries 
Power Source 
Hardwired 
Returnable 
90-Day 
Voltage (volts) 
120 
Warranty / Certifications
Certifications and Listings 
1-UL Listed 

MORE PRODUCTS WITH THESE FEATURES

Alarm Sensor Type: Ionization
Alarm/Detector Features: No Additional Features
Brand: BRK
Power Source: Hardwired
Review Rating: 4 & Up
Price: $10 - $20
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14 Questions9 Answers

Customer Questions & Answers

Hardwired Interconnected Smoke Alarm with Battery Backup
Hardwired Interconnected Smoke Alarm with Battery Backup

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4 answers

I need a replacement for BRK 4120B

This question is from Hardwired Interconnected Smoke Alarm with Battery Backup
Asked by
Boise ID
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September 2, 2015
I need to replace a BRK Model No. 4120B, What new Model number do I need to replace it with?
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Answers (4)

Asked by
Corona, CA
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Home Improvement Profile: DIYer
November 3, 2015
Answer: 
According to the manufacturer, the BRK Model No, 9120B is a suitable replacement for the BRK 4120B which has been discontinued. The connectors are the same, but you will have to replace the outer case ring for a better fit. I am on my way to Home Depot to see if they carry it in stock. It is available for on line purchase.
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Asked by
Plano, TX
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Home Improvement Profile: DIYer
November 2, 2015
Answer: 
I recently had to replace a 4120B through a warranty activity with BRK Electronics. They replaced it with a 9120B. It was completely plug compatible. You just need to use to new mounting assembly. I took less than 5 minutes to replace. Getting the ladder ready (I have very high ceilings) took most of the time.
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Asked by
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November 2, 2015
Answer: 
I have the same issue.I want to replace an existing one to the same mount.I will research and try to find out and will post what I find.
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Asked by
Toms River, New Jersey
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Home Improvement Profile: DIYer
October 5, 2015
Answer: 
I can not answer your question, I have the same need, I was wondering if you got a replacement and if so did it install into the same base unit on the wall, is the electrical connection the same?
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2 answers

Is this smoke alarm compatible with the obsolete BRK 4108?

This question is from Hardwired Interconnected Smoke Alarm with Battery Backup
Asked by
Indiana
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August 4, 2015
My BRK 4108 hard-wired, inter-connected alarms are 14 years old, and I want to replace them all.
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Asked by
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April 26, 2016
Answer: 
Yes.
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Asked by
Plano, TX
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Home Improvement Profile: DIYer
November 2, 2015
Answer: 
I suggest you call BRK Electronics 1-800-323-9005. I could not find 4108 in their cross-reference list.
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1 answer

can I buy without battery back up

This question is from Hardwired Interconnected Smoke Alarm with Battery Backup
Asked by
boston
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December 5, 2015
the ceilings are very high, we have a generator back u, we don't want battery back up can I still get smokes without battery backup?
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Answer (1)

December 22, 2015
Answer: 
Thank you for your recent inquiry with The Home Depot, Bob. All of the hardwired smoke alarms we carry have a battery backup. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot.
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1 answer

looking for sa86rac

This question is from Hardwired Interconnected Smoke Alarm with Battery Backup
Asked by
cupertino ca
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November 20, 2015
what can I replace this model with
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Answer (1)

December 2, 2015
Answer: 
Hi skip, we do offer some BRK Hardwired Interconnected Smoke Alarm options on Homedepot.com that may suit your needs. Please review the products at the link I have provided below to see if any of the products will work for your project.
http://www.homedepot.com/s/brk%2520hardwired%2520interconnected%2520smoke%2520alarm?NCNI-5
We appreciate your business and look forward to serving you in the future. Read More
Hi skip, we do offer some BRK Hardwired Interconnected Smoke Alarm options on Homedepot.com that may suit your needs. Please review the products at the link I have provided below to see if any of the products will work for your project.
http://www.homedepot.com/s/brk%2520hardwired%2520interconnected%2520smoke%2520alarm?NCNI-5
We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot! Read Less
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CUSTOMER REVIEWS

Rated 4.3 out of 5 by 92 reviewers.
Rated 5.0 out of 5.0 by Nice Alarm These were replacement smoke alarms. The previous product was no longer manufactured. To install this alarm the bracket had to be replaced but it was simple and the existing electrical connections matched the replacement alarm and plugged in with no modification April 26, 2016
Rated 5.0 out of 5.0 by Pergo flooring Great job installing. Everyone was helpful! It looks great and I would go back. April 26, 2016
Rated 4.0 out of 5.0 by Easy replacement to older hardwired detector Expired detector came out, changed the mounting bracket and plugged it in. That was all it took. May 31, 2016
Rated 4.0 out of 5.0 by Great Price Very easy to install and anyone can do it. Great price. April 19, 2016
Rated 5.0 out of 5.0 by A necessity for every home Bought to replace old detector that had been in service for over thirteen years. Great safety product and easy to install as replacement. May 24, 2016
Rated 5.0 out of 5.0 by Good Value Product 1.Nice item-(also-packaged well) 2.With shipping-BEST PRICE of your competitors ! SO WE UNDERSTAND ! PRICE IS E V E R T H I N G !!! March 8, 2016
Rated 5.0 out of 5.0 by Good Alarm Replaced the old detector and it hooked up to the old connection properly and was easy to install. Have not had any issues with it. February 23, 2016
Rated 3.0 out of 5.0 by Somewhat disappointed Having five of these alarms for only three years, I was surprised that one began beeping intermittently; sometimes every 2 minutes, 5 minutes, a few hours and other times days. Changing the battery did not help. At $12, not a huge investment, but a dispointment that after three years I have to replace one. Are the others next? January 22, 2016
  • 2016-06-25 T17:44:02.062-05:00
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