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  • First Alert SC9120BCA Hardwire Combination Carbon Monoxide and Smoke Alarm
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First Alert SC9120BCA Hardwire Combination Carbon Monoxide and Smoke Alarm

4.6 out of 5 stars (1,331)
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About this item

  • 120-Volt hard-wired detector. Electrochemical, Ionization sensor type
  • Alarm is wired directly into your electrical system and includes a battery backup and mute button
  • Battery backup ensures alarms work even during power outages
  • Combination smoke and CO alarm eliminates the need for 2 electrical boxes
  • 5-year limited warranty
  • Loud 85db Siren

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From the manufacturer

first alert, smoke detector, carbon monoxide, CO detector, fire alarm

First Alert SC9120BCA Hardwire Combination Carbon Monoxide and Smoke Alarm

The First Alert BRK SC9120BCA Hardwired Combination Smoke and Carbon Monoxide Alarm detects both carbon monoxide and smoke in a single device. It is designed for hardwired installation but features a battery backup that allows the unit to function in the event of a power outage. The CO smoke detector can be connected to other compatible BRK or First Alert CO smoke detectors within a single-family residence.

What's in the Box:

  • First Alert BRK SC9120BCA Hardwired Combination Smoke and Carbon Monoxide Alarm with Battery Backup and Owner's manual
  • Universal mounting bracket and hardware
  • 9-volt battery

At a Glance:

  • Hardwired CO smoke alarm features battery backup for constant monitoring
  • Can connect to other compatible BRK or First Alert CO smoke alarms
  • Lights indicate if the alarm is for smoke or for carbon monoxide
  • Single test/silence button for simple operation
  • Side-load battery compartment for convenience
first alert, smoke detector, carbon monoxide, CO detector, fire alarm

Detects Smoke and Carbon Monoxide

Designed to meet the latest construction requirements, the First Alert BRK SC9120BCA Hardwired Combination Smoke and Carbon Monoxide Alarm detects two threats: smoke and carbon monoxide. Lights on the face of the alarm tell you what the threat is, and false alarms can be silenced with a single button.

first alert, smoke detector, carbon monoxide, CO detector, fire alarm

Connect to Other Alarms for Greater Coverage

This hardwired combination smoke and carbon monoxide detector can be connected to other compatible BRK or First Alert CO smoke detectors within a single-family residence. Once one alarm is triggered, all connected CO smoke alarms will sound. The latching alarm indicator on the CO smoke alarm automatically identifies which unit initiated the alarm--even after the conditions that set off the alarm have subsided.

Easy to Install and Maintain

The First Alert BRK SC9120BCA Hardwired Combination Smoke and Carbon Monoxide Alarm integrates with existing wiring and features a universal mounting bracket that makes installing the unit quick and easy. The side-load battery compartment makes changing the 9-volt battery simple. Tamper-resistant locking pins prevent unauthorized disabling of the CO smoke alarm.

first alert, smoke detector, carbon monoxide, CO detector, fire alarm

About First Alert

For nearly 60 years, First Alert has been an innovator in the home safety industry, helping its customers protect what matters most. From smoke detectors and carbon monoxide alarms to security cameras and safes, the company manufactures reliable, technologically advanced products that offer a sense of preparedness and peace of mind. First Alert also takes pride in community outreach and has maintained a longstanding commitment to fire service support and safety awareness.

Product information

Technical Details

Manufacturer ‎First Alert
Place of Business ‎AURORA, IL, 60504 US
Part Number ‎SC9120BCA
Product Dimensions ‎14.22 x 4.83 x 14.22 cm; 300 g
Batteries ‎1 9V batteries required.
Item model number ‎SC9120BCA
Is discontinued by manufacturer ‎No
Style ‎Modern Compact
Material ‎Carbon
Power Source ‎Battery Powered
Item Package Quantity ‎1
Included Components ‎smoke and carbon monoxide alarm
Batteries Included? ‎No
Batteries Required? ‎No
Battery Cell Type ‎Alkaline
Warranty Description ‎5-year limited warranty
Item Weight ‎300 g

Additional Information

ASIN B005M1UMDC
Customer Reviews
4.6 out of 5 stars (1,331)

4.6 out of 5 stars
鶹 Rank
Date First Available Sept. 9 2011

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Product description

鶹.ca Product Description

Combination smoke and CO alarm eliminates the need for two electrical boxes and features a permanently installed CO sensor and a dual ionization smoke sensor. The quick plug-in connectors for easy installation can be interconnected with up to 12 First Alert smoke alarms and 6 additional devices. The alarm is wired directly into your homes electrical system and includes a battery backup and mute button. Hard-wired detectors with battery backup ensures alarms work even during power outages. Battery installation and removal can occur while the unit is mounted to the ceiling or wall via the side load battery compartment. The mute feature silences nuisance alarms, single button tests alarm functions and alerts when it is time to change battery. The First Alert SC9120BNCA Hardwire Combination Carbon Monoxide/Smoke Alarm comes with a 5-year limited warranty. First Alert is the most trusted brands in home safety. Our mission is helping protect the lives, well being and the valuables of our customers.

From the Manufacturer

The First Alert SC9120BA Hardwired Combination Smoke and Carbon Monoxide Alarm provides reliable whole-home protection with dual sensing technology and a 9V battery backup for uninterrupted operation during power outages. It combines an ionization smoke sensor, ideal for detecting fast-flaming fires, with an electrochemical carbon monoxide sensor, the most accurate technology available for CO detection. Designed for easy installation, this alarm features a universal mounting bracket, tamper-resistant locking pins, and a convenient side-load battery compartment for quick replacement without removing the unit from its mounting. The test/silence button allows you to check the alarm’s functionality or mute nuisance alarms, while the latching alarm indicator identifies the originating unit after an alarm event. For extended coverage, the SC9120BA can be interconnected with other compatible BRK and First Alert alarms, ensuring a networked safety system across your home.

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