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First Alert SA303CN3 Battery Powered Ionization Smoke Alarm with Test/Silence Button , White

4.6 4.6 out of 5 stars 22,593 ratings
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SA303CN3
Alarm
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About this item

  • Help keep your family safe with this battery powered smoke alarm featuring an ionization sensor for smoke detection; a loud 85 decibel alarm sounds when smoke levels are elevated
  • Ionization sensor is effective in recognizing smoke from flaming fires such as paper and grease fires
  • Battery operated alarm unit provides continuous monitoring even if there's a power failure; Plus, it's easy to install
  • Tamper resistant alarm also features a single test/silence button, side battery door, and missing battery guard
  • To ensure complete protection make sure to place one on each level of your home and in each bedroom
  • First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)
› See more product details

Customer ratings by feature

Easy to use
4.9 4.9
Light weight
4.8 4.8
Noise level
4.5 4.5
Easy to install
4.1 4.1
See all reviews

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Customer reviews

4.6 out of 5 stars
4.6 out of 5
22,593 global ratings

Customers say

Customers like the value and ease of installation of the gas smoke fire alarm. They mention that it is a great product for the price and that it has great directions. However, some customers differ on quality and battery life.

AI-generated from the text of customer reviews

761 customers mention669 positive92 negative

Customers find the installation process of the gas smoke fire alarm to be easy. They mention that the sensor is easy to install.

"...We’ve ordered 3 of the SA303CN3 and thankfully, they were super easy to install and took just a few minutes from start to finish...." Read more

"...It is also very easy to mount it on the wall or the ceiling...." Read more

"...only two parts, plus a pack of screws and a battery, so installation is fast and easy (ladder, Philips screwdriver, pencil)...." Read more

"...This one matches the one it was replacing so it was 5 stars Easy to Install. And First Alert is a well known brand...." Read more

573 customers mention466 positive107 negative

Customers like the value of the gas smoke fire alarm. They mention that it's a great product for the price and that it was easy to install.

"...Pretty good value. I got it for around $18." Read more

"...I replaced all my alarms, and these are well worth the money, easy to install and they come with a ten year battery." Read more

"Good deal good price" Read more

"Great product for the price and easiest installation I've seen." Read more

1,301 customers mention757 positive544 negative

Customers are mixed about the quality of the gas smoke fire alarm. Some mention that it works just exactly as advertised, while others say that it malfunctioned and had a critical failure. The onboard test button and the silencing feature each worked correctly, producing a loud audible. However, some customers say that they had to get rid of it due to it being defective and poorly designed.

"Works just fine; let me know when my son burned his grilled cheese lol" Read more

"...into the compartment to test the machine before installation, neither detector worked. It turned out one of the included batteries was dead...." Read more

"It works just exactly as advertised instead of like the smoke detector we had in the kitchen." Read more

"...have been clueless for as long as 10 years that they were in fact inoperable units...." Read more

344 customers mention145 positive199 negative

Customers are mixed about the battery life of the gas smoke fire alarm. Some mention that it comes with a good battery, while others say that it was dead or missing.

"...It turned out one of the included batteries was dead. (By the way, the recommended battery is energizer, but that is not what was included.)..." Read more

"...these are well worth the money, easy to install and they come with a ten year battery." Read more

"...The third has no batteries or hanging hardware. The one with batteries did chirp when they were installed, so hopefully that's a good sign" Read more

"...that these smoke detectors have dual sensors, and can work with rechargeable NiMh AA batteries, saving me from having to buy disposable alkaline..." Read more

Quick Install and No Headaches
5 Stars
Quick Install and No Headaches
Why is it that when one smoke detector goes out, all the others do too? We’ve ordered 3 of the SA303CN3 and thankfully, they were super easy to install and took just a few minutes from start to finish. As a mom, I needed something quick and efficient, and this was that. I really can’t complain about these. I know some people have had issues with the batteries, but ours were totally fine. I was super hesitant that they would beep after installation or that they would wake us up in the middle of the night, but it’s been a few weeks and they’ve been quiet and working. I can’t really speak to the battery life, because it really hasn’t been long enough but so far so good. I’ll edit my review if anything changes.
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Top reviews from the United States

hudfam
5.0 out of 5 stars Quick Install and No Headaches
Reviewed in the United States on September 11, 2023
Style: SA303CN3Pattern Name: AlarmVerified Purchase
Customer image
hudfam
5.0 out of 5 stars Quick Install and No Headaches
Reviewed in the United States on September 11, 2023
Why is it that when one smoke detector goes out, all the others do too? We’ve ordered 3 of the SA303CN3 and thankfully, they were super easy to install and took just a few minutes from start to finish. As a mom, I needed something quick and efficient, and this was that. I really can’t complain about these. I know some people have had issues with the batteries, but ours were totally fine. I was super hesitant that they would beep after installation or that they would wake us up in the middle of the night, but it’s been a few weeks and they’ve been quiet and working. I can’t really speak to the battery life, because it really hasn’t been long enough but so far so good. I’ll edit my review if anything changes.
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12 people found this helpful
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Sue
5.0 out of 5 stars Most improved new model
Reviewed in the United States on January 23, 2024
Style: SA303CN3Pattern Name: AlarmVerified Purchase
2 people found this helpful
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Freedom Vista
5.0 out of 5 stars Consumer Reports love it and so do I
Reviewed in the United States on January 3, 2024
Style: SA320FFPattern Name: AlarmVerified Purchase
5 people found this helpful
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Rainy
4.0 out of 5 stars We needed to replace our old Smoke Alarms. These work!
Reviewed in the United States on January 30, 2023
Style: SA303CN3Pattern Name: AlarmVerified Purchase
15 people found this helpful
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Sarah
5.0 out of 5 stars Works as expected
Reviewed in the United States on January 19, 2024
Style: SA303CN3Pattern Name: AlarmVerified Purchase
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Mike
5.0 out of 5 stars A Dependable Brand Name Alarm
Reviewed in the United States on January 4, 2024
Style: SA304CN3Pattern Name: AlarmVerified Purchase
One person found this helpful
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Charles R Farrell
5.0 out of 5 stars Replaced all my home smoke detectors
Reviewed in the United States on January 17, 2024
Style: SA3210Pattern Name: Fire and SmokeVerified Purchase
4 people found this helpful
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NOYBIE
5.0 out of 5 stars You need the dual sensor! Ionization (flames) and photoelectric (smoke).
Reviewed in the United States on November 17, 2023
Style: SA3210Pattern Name: Fire and SmokeVerified Purchase
10 people found this helpful
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Top reviews from other countries

Al
4.0 out of 5 stars Not so good ,,,,
Reviewed in Canada on January 2, 2021
Style: SA303CN3Pattern Name: AlarmVerified Purchase
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