First Alert co5120bn Hardwired Co Alarm 120V Battery Backup

Product Description

The FIRST ALERT co5120bn is a hardwired carbon monoxide alarm designed for residential installation where CO detection is required by code, including new construction applications. It operates on 120V AC power with a 9V battery backup to maintain protection during power outages. The unit uses an electrochemical CO sensor rated for a 10-year service life and incorporates intelligent sensing technology to reduce nuisance alarms. A licensed electrician typically performs the hardwired installation, which connects to existing household wiring through a quick plug-in power connector for straightforward setup and future maintenance access.

This alarm is suited for residential new construction and retrofit applications where local building codes mandate carbon monoxide detection. It is typically installed in sleeping areas, hallways, and other locations specified by the International Residential Code or applicable local amendments. The quick plug-in connector reduces installation time and simplifies unit replacement when the sensor reaches end of life. A latching alarm indicator allows technicians to confirm a CO event occurred even after the alarm has been silenced, which aids in post-event diagnosis.

Key Features

• Electrochemical CO sensor with a 10-year rated service life
• 120V AC hardwired operation with 9V battery backup for continuous protection during outages
• Intelligent sensing technology limits nuisance alarms
• Latching alarm indicator retains event history after silence
• Single button test and silence operation with two silence feature modes
• End-of-life signal alerts when sensor replacement is needed
• Quick plug-in power connector for easy installation and maintenance

Compatibility

Designed as an OEM-style hardwired carbon monoxide alarm for residential applications requiring 120V AC/DC CO detection with battery backup. Meets codes where carbon monoxide alarms are required for new construction.

Installation Notes

Installation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and applicable local building codes. Shut off the circuit breaker supplying the installation location before making any wiring connections. The quick plug-in connector must be fully seated before mounting the unit to its base. Replace the 9V backup battery at the interval recommended by the manufacturer or whenever the low-battery signal activates.

Technical Specifications

• Power Input: 120V AC/DC hardwired
• Backup Power: 9V battery
• Sensor Type: Electrochemical carbon monoxide sensor
• Sensor Life: 10 years
• Alarm Indicator: Latching
• Silence Modes: 2
• Test/Silence Control: Single button

Standard Information

• Brand: FIRST ALERT
• Manufacturer Part Number: co5120bn