BRK First Alert SM300-AC (1046759) Hardwired Photoelectric and Ionization Combo Smoke Alarm with Battery Backup

This alarm is a direct replacement for the 3120B alarm.
The BRK First Alert SM300-AC (1046758) is a dual sensing detection unit that utilizes both photoelectric and ionization sensors to detect a multitude of smoke types.

Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup

– Dual smoke sensor technology, optimal protection for both smoldering and fast flaming fires.
– Direct wire-in AA battery backup, hardwired with battery backup for protection during power outages.
– Latching alarm indicator, visually identifies unit that initiated alarm or low battery.
– Smart Interconnect, interconnects with most First Alert and BRK hardwired alarms. When one alarm sounds, all compatible* alarms sound
– Test/Silence Button, temporarily silence or test the alarm with one-touch, easy access button.
– Dust cover, keeps the alarm clean during construction.
– Precision Detection
– Conforms to UL 217 8th Edition Standard

SM300-AC (1046758) Specifications:

Utilizes both ionization and photoelectric smoke sensors for maximum protection
Two Latching Features – Alarm Latch and Low Battery Latch
Two Silence Features – Alarm Silence and Low Battery Silence
Two AA Battery Backup
Optipath 360 Technology
10-Years Limited Warranty
Model # 3120B
Weight 9.5 oz
Dimension 5.0″ dia x 2.0″H
Operating Voltage 120V AC 60Hz w/ two 1.5V AA battery backup
Operating Current 0.07 amps (standby/alarm)
Temperature Range 40°F (4°C) to 100°F (38°C)
Humidity Range 10% to 90% relative humidity (RH)
Audio Alarm 85dB at 10 feet
Test/Silence Electronically simulates smoke condition, causing the unit to alarm Press and hold test/silence button
Alarm Reset Automatic when smoke clears
Interconnections Up to 18 units of First Alert or BRK Smoke, CO and Heat Alarms. Maximum of 12 smoke alarms. See user’s manual for details.
Smoke Sensor Photoelectric and Ionization
Indicator Lights/Sounds
AC Power: Constant Green LED
DC Power: Intermittent Green LED
Local Alarm: Red LED flashes rapidly
Remote Alarm: Red LED out.
Alarm Latch: LED flashes red 2 sec on, 2 sec off after local alarm stops
Low Battery Latch: LED flashes green 2 sec on, 2 sec off

SKU’s: SM300-AC, 1046759