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Alarm Type	Smoke Alarm
Power Source	Hardwired (120V AC) with 10-Year Sealed Battery Backup
Sensor	Photoelectric
Interconnects	Yes (up to 24 Kidde devices)
Battery	10-Year Sealed Lithium

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Hardwired Photoelectric Smoke Alarm with 10-Year Sealed Battery Backup

The Kidde 20SA10 Hardwired Smoke Alarm delivers next-level fire safety with cutting-edge photoelectric sensing technology and a 10-year sealed lithium backup battery. Designed to detect smoke up to 25% faster, it uses enhanced sensing technology to reduce false alarms caused by cooking and steam while maintaining quick, accurate detection when real smoke is present. Operating on 120V AC with a sealed 10-year battery backup, this alarm provides continuous protection during power outages and eliminates low-battery chirps. The interconnect feature allows up to 24 Kidde alarms to sound together for whole-home detection. Rigorously tested to meet UL 217 10th Edition and FCC standards, it features self-testing internal components, end-of-life notification, alarm memory, and a 10-year limited warranty.

Top Features

Photoelectric Smoke Sensor: Detects smoke up to 25% faster with enhanced sensing technology that reduces false alarms from cooking.
Hardwired with 10-Year Sealed Battery Backup: 120V AC powered with sealed lithium battery — no battery changes for 10 years, saves up to $40 in replacements.
Interconnect Capability: Connects with up to 24 Kidde devices via hardwire — when one alarm sounds, they all sound.
Self-Testing & Alarm Memory: Internal self-diagnostics plus 24-hour alarm memory that blinks the red LED every 15 seconds if smoke was detected.
85 dB Audible Alert with Red LED: Loud 85-decibel alarm at 10 ft with red LED visual warning — meets UL 217 10th Edition standards.

Category	Specification
Detection and Sensing
Type	Smoke Alarm
Sensor Type	Photoelectric
Sensor Information	Enhanced sensing technology detects smoke up to 25% faster while reducing nuisance alarms caused by cooking and steam.
Sound Level	85 dB at 10 ft
Features	Fast Alerts, Alarm Memory, Self-Testing, End-of-Life Notification, Enhanced Cooking Resistance
Power and Interconnectivity
Power Source	Hardwired 120V AC, 60 Hz
Battery Backup	Yes — 10-Year Sealed Lithium
Battery Replaceable	No (sealed, maintenance-free)
Low Battery Chirps	Eliminated — sealed battery design
Hardwired Interconnectivity	Yes — up to 24 Kidde devices
Wiring	AC wiring with plug-in quick connector
Max Interconnect Wire Length	1,000 ft
Design and Build
Model Number	20SA10
Mfr Item Number	21031556
Diameter	5 inches
Depth	2 inches
Height	5 inches
Weight	0.77 lbs
Color	White
Mounting	Twist-and-click bracket (wall or ceiling, single gang or 4-inch octagon junction box)
Operating Temperature	40°F to 100°F (4.4°C to 37.8°C)
Humidity Range	Up to 95% RH, non-condensing
Warranty	10-Year Limited (alarm + battery)
Compliance and Certification
Certifications	UL 217 10th Edition, FCC
Series	Kidde DETECT

The Kidde 20SA10 is rigorously tested to meet UL 217 10th Edition and FCC standards, delivering dependable, code-compliant performance trusted by homeowners, property managers, contractors, and safety professionals. Backed by a 10-year limited warranty on both the alarm and the sealed battery.

Don't know what type of smoke alarm is right for your home? Check out our guide on how to choose the right smoke detector for your home.

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In The Box

1 Kidde 20SA10 Hardwired Smoke Alarm
1 Twist-and-Click Mounting Bracket
1 Plug-in Quick Connector
1 User Guide

Info & Guides

User Manual	Download
Specification Sheet	Download

Kidde 20SA10 Hardwired Smoke Alarm with 10-Year Sealed Battery Backup, Photoelectric, Interconnectable