Top 10 BRK 4120b Smoke Detector Replacement 6 Pack – Smoke Detectors & Fire Alarms

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1. FIRST ALERT

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First Alert BRK 9120Bff-6 Hardwired Smoke Detector with Battery Backup, 6-Pack

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FIRST ALERT #ad - 10-year limited. 120-volt ac power with 9-volt battery backup included to keep alarm functioning during power outage. 6 pack of hardwired smoke alarms, includes battery backup for power outages. Open mounting design for easy installation with side load battery compartment for quick replacement and interconnect able up to 18 units 12 smoke, 6 co/heat/relay. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Tamper resistant locking pins, single button silence/test and loud 85Db alarm.
BrandFIRST ALERT #ad
ManufacturerFirst Alert #ad
Height2.2 Inches
Length5.6 Inches
Weight0.6 Pounds
Width5.6 Inches
Part Number9120BFF-6
Model9120BFF-6

2. FIRST ALERT

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First Alert BRK 9120B6CP Hardwired Smoke Alarm with Backup Battery, 6-Pack

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FIRST ALERT #ad - Simple to use, with a single test/silence button, and side load battery compartment; Tamper resistant locking brackets and universal mounting brackets make installation easy. Rigorously tested to meet UL standards. Note: a loose neutral white wire connection within the home junction box could prompt a device malfunction.

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. To ensure complete protection make sure to place one on each level of your home and in each bedroom. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.

Emits T3 pattern. Keep your family safe with this 6 pack of hardwired smoke alarms; the battery backup means constant monitoring, even if there's a power failure. Can connect to other compatible BRK or First Alert smoke detectors, to ensure all alarms will sound when smoke is detected. Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm.
BrandFIRST ALERT #ad
ManufacturerFirst Alert #ad
Height5.6 Inches
Length5.6 Inches
Width1.9 Inches
Part Number9120B6CP
ModelBRK9120b
Warranty10 year

3. FIRST ALERT

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White, First Alert BRK SC9120B-6 Hardwired Smoke and Carbon Monoxide Detector CO with Battery Backup. 6-Pack

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FIRST ALERT #ad - Simple to use, with a single test/silence button, and side-load battery compartment; tamper-resistant locking brackets and universal mounting brackets make installation easy. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.

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. Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85-decibel siren provides a clear, loud warning upon detection. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected.

Features an electrochemical Carbon Monoxide sensing technology as well as an ionization sensor that detects the fine particles of a fast-burning fire. Keep your family safe with this 6-pack of hardwired smoke and carbon monoxide alarms; The battery backup means constant monitoring, even if there's a power failure.
BrandFIRST ALERT #ad
ManufacturerFirst Alert #ad
Height2.2 Inches
Length5.6 Inches
Weight0.7 Pounds
Width5.6 Inches
Part NumberSC9120BFF-6
ModelBRK SC9120B-6

4. FIRST ALERT

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White, FIRST ALERT BRK 9120LBL Hardwired Smoke Detector with Adapter Plugs for Easy Replacement

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FIRST ALERT #ad - Simple to use, with a single test/silence button, and side-load battery compartment; tamper-resistant locking brackets and universal mounting brackets make installation easy. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety.

Convenient adapter plugs makes it easy to replace existing hardwired alarms without needing to rewire. Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast-flaming fires and alerts you with an 85-decibel alarm. Keep your family safe with this hardwired First Alert smoke alarm with a 10-year battery backup, which means constant monitoring for the life of the alarm, even if there's a power failure.

Emits t3 pattern; Rigorously tested to meet UL standards. 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. Can connect to other compatible BRK or First Alert smoke alarms, to ensure all alarms will sound when smoke is detected.
BrandFIRST ALERT #ad
ManufacturerFirst Alert #ad
Height2.25 Inches
Length5.75 Inches
Weight0 Pounds
Width5.75 Inches
Part Number1039939
Model9120LBL

5. FIRST ALERT

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FIRST ALERT BRK 9120LBL Hardwired Smoke Detector with Battery Backup

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FIRST ALERT #ad - To ensure complete protection make sure to place one on each level of your home and in each bedroom. Simple to use, with a single test/silence button, and side-load battery compartment; tamper-resistant locking brackets and universal mounting brackets make installation easy.

Emits T3 Pattern. Rigorously tested to meet ul standards ; 120-volt hardwired smoke alarm wires directly into your home’s electrical system. Keep your family safe with this hardwired smoke alarm; the 10-year battery backup means constant monitoring for the life of the alarm, even if there's a power failure.

Can connect to other compatible BRK or First Alert smoke detectors, to ensure all alarms will sound when smoke is detected. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast-flaming fires and alerts you with an 85-decibel alarm.
BrandFIRST ALERT #ad
ManufacturerFirst Alert #ad
Height5.69 Inches
Length5.59 Inches
Weight0.66 Pounds
Width2.25 Inches
Part Number9120LBL
Model9120LBLFF
Warranty10

6. FIRST ALERT

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First Alert BRK 7010B Hardwired Smoke Detector with Photoelectric Sensor and Battery Backup , White

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FIRST ALERT #ad - Features convenient 9 volt battery backup, silence/test button, dust cover, 85 decibel alarm.120 volt hardwire smoke alarm with photoelectric sensor and battery backup. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Intuitive latching alarm indicator identifies which unit triggered alarm. Inter connectable with BRK and first alert hardwired smoke and carbon monoxide alarms. Backed by 10 year limited warranty and tested to meet UL 217 standards. 85 decibel alarm.
BrandFIRST ALERT #ad
ManufacturerBRK Brands #ad
Height5.13 Inches
Length5.13 Inches
Weight0.8 Pounds
Width5.13 Inches
Part NumberGID-601061
Model7010B

7. Kidde

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Test-Silence Button, Kidde Smoke Detector, Hardwired Smoke Alarm with Battery Backup & Interconnect

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Kidde #ad - Ul certified, 10-year limited warranty. Electrochemical sensing technology - CO alarm detects the presence of carbon monoxide gas, 85 decibel alarm.
BrandKidde #ad
ManufacturerKidde Safety #ad
Height6 Inches
Length2 Inches
Weight0.74 Pounds
Width6 Inches
Part Number21029727
ModelI12040A
Warranty5 Year Limited

8. Kidde

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Voice Alert, Battery Powered, Kidde Smoke & Carbon Monoxide Detector, Interconnect Combination Smoke & CO Alarm

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Kidde #ad - Protects during a power failure - combo smoke and CO alarm operates on 2-AA batteries. Ul certified, 10-year limited warranty. Fire & co detector in 1 unit with alert modes, led lights, that states, "warning! carbon Monoxide!", & voice alarm, "Fire! Fire!", or "Low Battery!". Test-hush feature - silences the unit for approximately 8 minutes; tamper-resistant technology deters removal of the unit from the wall or ceiling. Ionization sensor technology - smoke detector detects invisible fire particles, 85 decibel alarm alerts of fire.
BrandKidde #ad
ManufacturerKidde Safety #ad
Height5.6 Inches
Length1.8 Inches
Weight1 Pounds
Width5.6 Inches
Part Number21026043
ModelKN-COSM-BA
Warranty5-year limited warranty

9. FIRST ALERT

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First Alert BRK 3120B Hardwired Photoelectric and Ionization Smoke Alarm with Battery Backup

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FIRST ALERT #ad - Temperature range: 40°f 4°c to 100°F 38°C. Photoelectric and ionization sensors provide comprehensive fire detection. Emits T3 Pattern. Hardwired alarm includes battery backup for power outages.

Optipath 360 patented technology provides 360 degrees of access to the smoke alarm. A single button makes alarm easy to test monthly or silence during a false alarm. Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Two latching features help indicate a low battery or the originating alarm in a system. 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. Equipped with a dual photoelectric and ionization smoke sensor to quickly detect both fast burning and smoldering fires.
BrandFIRST ALERT #ad
ManufacturerFirst Alert #ad
Height2.4 Inches
Length5.7 Inches
Weight0.85 Pounds
Width5.7 Inches
Part Number3120FF
Model3120FF
Warranty10 Year Limited

10. FIRST ALERT

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FIRST ALERT BRK SC7010BV Hardwired Talking Photoelectric Smoke and Carbon Monoxide CO Detector

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FIRST ALERT #ad - 10 year limited warranty; equipped with end of life signal chirp, so you know when it's time to replace the unit for your safety. Tells you whether the danger is smoke or carbon monoxide and where the threat is among up to 11 preprogrammed locations in your home.

The 85-decibel alarm provides a clear, loud warning upon detection. Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected. Features electrochemical carbon Monoxide sensing technology and photoelectric smoke sensor optimized to detect larger smoke particles produced by smoldering fires; helps minimize the number of false alarms. Note: kindly refer to the user manual provided as a PDF manual in the product description section. 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.

Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety. Rigorously tested to meet UL standards. Keep your family safe with this talking hardwired smoke and carbon monoxide alarm; It's equipped with voice and location, so you are alerted of the danger and where it originates from across your house.
BrandFIRST ALERT #ad
ManufacturerFirst Alert / BRK Brands, Inc. #ad
Height5.13 Inches
Length5.13 Inches
Weight0.7 Pounds
Width2.38 Inches
Part NumberSC7010BV
ModelSC7010BV
Warranty10 year