The First Alert SA9120BCN is a hardwired ionization smoke alarm designed to detect smoke and fire hazards in your home or building. Powered by 120VAC with a 9-volt battery backup, this alarm ensures continuous protection even during power outages, so you and your family receive early warning of potential fire threats. The ionization detection technology quickly identifies smoke particles, helping to minimize false alarms while maintaining reliable fire safety coverage.
This smoke detector operates at 85 decibels and includes a silence button to quiet unwanted alarms. A visual signal helps pinpoint the alarm origin, and the Quick Connect Plug design enables fast installation without rewiring—simply mount using the included universal mounting bracket and replace or retrofit existing alarms with ease.
Features and Benefits
- Battery Backup: The 9V backup battery keeps the alarm operational during power failures, ensuring continuous protection around the clock.
- Ionization Detection: Advanced sensing technology detects smoke quickly and minimizes false alarms for reliable fire detection.
- Interconnectable System: Connect up to 12 alarms throughout your home to create a whole-home alarm network, so when one alarm sounds, all interconnected alarms alert you simultaneously.
- Easy Installation: The Quick Connect Plug and universal mounting bracket allow installation without rewiring, making it simple to replace existing alarms.
- Silence Button: Quiet unwanted alarms without disabling the unit.
- Visual Signal: A visual indicator helps you identify which alarm has been triggered in a multi-alarm setup.
Specifications
- Brand: First Alert
- Model: SA9120BCN
- Power Source: 120VAC hardwired with 9V battery backup
- Detection Type: Ionization
- Alarm Volume: 85 dB
- Interconnectable: Up to 12 alarms
- Includes: Universal mounting bracket and 9V battery








