First Alert SA9120BPCN Hard Wired Smoke and Fire Detector With Adapter Kit

4.5 stars
43 reviews ratings
Walmart #: 553101086
FREE shipping available on $50 + orders
If your order totals $50 or more and you select Value shipping, this item and any other qualifying items ship for free!
FREE pickup
Sold by

Click on these options to see if you can get it by Christmas

Showing options for 07095
Data unavailable
Data unavailable
Data unavailable
Data unavailable
Showing options for 07095
  • Alarm is wired directly into your home's electrical system
  • Includes battery backup
  • About this item

      Protect your home with the First Alert SA9120BPCN Hard Wired Smoke and Fire Detector With Adapter Kit. It can be wired directly into your home's electrical system, and it has a battery backup for protection during power failures. It has an easy-access battery drawer so you can change the battery without removing the alarm from the ceiling. You can check to make sure it is functioning properly with a single button test. This hard-wired smoke detector has a mute feature to silence the detector during false alarms and testing. It can be easily replaced without rewiring, using the included adapter plugs.

      Alarm is wired directly into your home's electrical system
    • Includes battery backup to ensure alarm works during power outages
    • Mute feature silences detector when nuisance alarm sounds
    • Single button tests detector functions
    • Includes adapter plugs to easily replace other detectors without rewiring
    • Can integrate with up to 12 other First Alert or BRK hard wired alarms
    • Easy-access battery drawer; no need to remove alarm from ceiling to change battery
    • Includes manufacturer's 10-year limited warranty
    • Meets UL standards


    Multi Pack Indicator: No
    Model No.: SA9120BPCN
    Shipping Weight (in pounds): 2.5
    Product in Inches (L x W x H): 1.93 x 7.5 x 12.5
    Assembled in Country of Origin: USA or Imported
    Origin of Components: USA or Imported
    Walmart No.: 553101086

    Customer reviews

    Customer Reviews | 43 reviews | 4.3 out of 5

    4.5 stars

    43 reviews | 4.3 out of 5

    5 stars
    4 stars
    3 stars
    2 stars
    1 stars
    Would recommend to a friend



    Excellent Replacement

    Customer review by SemiHandiman

    5.0 stars by SemiHandiman

    I was concerned about compatibility with the plug in connection to my hardwired system. Not only was this the same connector as I had for a BRK 4120SB, but the adapter kit has wire sets to convert for other manufacturers' connectors. I also learned in the process that BRK and First Alert are the same company. Complete replacement took 5 minutes -all the old parts gone and new parts installed and tested.

    Was this review helpful? (27) (0)
    Thank you! You have successfully submitted feedback for this review.
    Would recommend to a friend? Yes

    Customer review by LEWALL

    5.0 stars by LEWALL

    I had a hardwired smoke detector that was 30 years old and not functioning. It was not battery back up. I was looking for a replacement and found this one while wondering the aisles at Walmart. I didn't think they had one. But there it was on a shelf, and battery back up. It was easy to rewire the adapters. Everything I needed came in the package. I used the mount that came with. In about 10 minutes I was done. Tested and working both with the electric on and off. Wire it up right, and you can't go wrong.

    Was this review helpful? (9) (0)
    Thank you! You have successfully submitted feedback for this review.
    Breinigsvill, PA
    Would recommend to a friend? Yes
    Ownership:11 - 12 months
    Age:45 - 54
    Usage:Every day
    Good Product

    Customer review by Bobsopinion

    5.0 stars by Bobsopinion

    Very easy to install. I did not have a plug so I simply wired the one provided, followed the instructions and had it done within 10 minutes. Anyone can do it if they simply use a little common sense and follow the instructions.

    Was this review helpful? (7) (0)
    Thank you! You have successfully submitted feedback for this review.
    Northern California
    Would recommend to a friend? Yes
    Ownership:1 week or less
    Age:55 - 64
    Usage:Every day
    1-3 of 37 total reviews See all

    Customer Q&A

    Have questions? Get answers from experts and customers who own this product.

    Ask a question

    If you would like to share feedback with us about pricing, delivery or other customer service issues, please contact customer service directly.

    Q&A tips and guidelines

    Q&A Exchange Guidelines

    When writing your question or answer, please follow these guidelines:

    • Do: Make sure your question is directly related to the product
    • Do: Be specific and provide as many details as possible
    • Do: Include the model number (if applicable)
    • Do: Write your question in English
    • Do Not: Include personal information (such as your full name)
    • All submitted questions and answers are subject to the terms set forth in our Terms and Conditions

    We reserve the right not to post your question or answer if it contains any of the following:

    • Any information not related to the actual merchandise or topic
    • Obscenities, discriminatory language or other language not suitable for a public forum
    • Advertisements or “spam” content
    • Email addresses, physical addresses or other forms of contact information
    • Critical or spiteful comments on other questions or answers posted on the page or their authors
    • Any imagery that demonstrates incorrect use of the merchandise
    • Anything that Walmart deems to be inappropriate, at Walmart's discretion

    Provide as many details as possible, including the model number (if applicable).

    Remember: Don’t include personal information (such as your full name).

    Preview Question

    Walmart does not sponsor, recommend or endorse any third party product or service, or any customer ideas or advice.

    Thank you.

    Questions will be checked against our question guidelines and posted within five to seven business days.

    by an anonymous customer 11/29/2010
    • I would assume First Alert has taken this in consideration. I wold advise replacing the old base with the new one for esthetics.
      by Doityourselfer551/24/2013
      Was this answer helpful? (0) (0)
    • The wall or ceiling adapter is enclosed in the package. Just remove the old one from the wall or ceiling and screw the new one in its place. If the plug adapters are different than those supplied with the new unit then simply cut the old connector and wires from the the older unit and connect them to the new unit and plug into the connector that exists in the receptacle box.
      by CTXl12/29/2012
      Was this answer helpful? (0) (0)
    • Can not tell you about the First Alert mathc, but they do come with the wall mount ring. Mine was a perfect fit for the old one.
      by rpetty4/30/2012
      Was this answer helpful? (0) (0)
    • That is the model that I replaced 4919 that was 9 yrs. old. Yes! It does have a new bracket and the wiring harness is the same as the old one. This has a battery back up while the old one didn't but remember to REVERSE the position of the battery from what you see in the package and point the contacts toward the inside; they don't show or explain that in the instructions. When I installed mine it kept chirping and I couldn't understand it until I REVERSED THE BATTERY. Good Luck! I hoped this helped? Recommended by Consumer Reports!
      by HunterforBargains7/2/2011
      Was this answer helpful? (1) (0)
    • I am an Electrician, and yes, all new smoke heads come with a new base mounting plate... I'm pretty sure it will not fit on an older unit's base...
      by An anonymous customer11/4/2014
      Was this answer helpful? (1) (0)
    1-3 of 17 questions See all

    Policies & Plans

    Warranty Plan

    Walmart Product Care Plans
    A limited product warranty is included free for most items. With an optional Walmart Care Plan you can enhance the manufacturer's coverage from the date of purchase . Walmart Product Care Plans cover 100% of the cost for repair or replacement, including shipping charges for the exchange.

    We'll show you Care Plan options and pricing at checkout if applicable, or go to for more information.

    Product warranty: 10 Years See details

    Supplier Warranty: 10-Year Limited
    Did you buy this in a Walmart store?  Get a warranty for it here.

    Product Recommendations

    Your recently viewed items

    Clear this list