Kidde Hardwired Smoke Detector 20SA10, 2-Pack
- 2 alarms with mounting hardware
- Smoke only, photoelectric sensor
- 120V AC hardwired, built-in 10-year battery backup
- 85-decibel alarm, red LED
- UL 217 10th Edition and FCC
- Interconnects with other Kidde alarms
- 10-year limited warranty from date of purchase
Updated 3 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A two-pack of hardwired photoelectric smoke alarms with sealed ten-year battery backup and interconnect for whole-home coverage. They detect smoke only, so carbon monoxide needs a separate alarm.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B0DDW2K42GModel: 20SA10
Overview
Kidde builds this alarm as a hardwired photoelectric smoke alarm with a sealed backup battery, so there are no battery swaps or low-battery chirps. Sensing tuned to tell cooking smoke and steam from real fire cuts nuisance alarms, and wired interconnect sets off every linked Kidde unit.
No battery maintenance is the reason to buy: the sealed backup covers outages for the alarm's life. Meeting the newer UL edition matters for code work in remodels. The limit is single-hazard detection, with no carbon monoxide sensor.
Who it's for
Homeowners, landlords and electricians updating hardwired smoke alarms get two units that never need battery changes. Homes with gas appliances or attached garages also need CO alarms alongside them.
Pros and cons
- Sealed battery backup, no chirps
- Fewer false alarms from cooking
- Meets UL 217 10th Edition
- Interconnects with other Kidde alarms
- Smoke only, no CO sensing
- Requires existing hardwiring
- Interconnect options vary by model
- Whole unit is replaced at end of life
Performance notes
The photoelectric sensor reacts to visible smoke particles, and the enhanced sensing logic filters out patterns typical of cooking or steam. Interconnect wiring makes every linked alarm sound when one detects smoke, which matters in multi-level homes. The sealed battery only takes over during power cuts, so AC power carries the daily load.
Specifications
| Brand | Kidde |
|---|---|
| Model | 20SA10 |
| Dimensions & fit | |
| Item Dimensions D X W X H | 1.88"D x 5"W x 5"H |
| Item Weight | 12.8 ounces |
| Capacity & performance | |
| Upper Temperature Rating | 100 °F |
| Power & efficiency | |
| Power Source | Corded Electric |
| Construction & materials | |
| Color | White |
| Enclosure Material | Plastic |
| Included components | |
| Unit Count | 2 Count |
| Warranty & support | |
| Manufacturer Warranty Description | 10-year Limited Warranty |
| Other details | |
| BuiltIn Media | Mounting Hardware, Two Alarm, User Guide |
| Item Type Name | Smoke Alarm |
| Mfr Part Number | 21032864 |
| Operating Humidity | up to 95% relative humidity (RH), non-condensing |
| Product Style | Modern |
| Sensor Type | Photoelectric |
Frequently asked questions
Do I need to change batteries in the Kidde 20SA10?
No. It has a built-in 10-year battery backup, so there are no battery replacements or low battery chirps.
Does the Kidde 20SA10 detect carbon monoxide?
No. It is a photoelectric smoke alarm only.
Can the Kidde 20SA10 connect to my existing Kidde alarms?
It connects with other Kidde alarms. Different models offer different interconnection options, so check the User Guide.
How many alarms come in the Kidde 20SA10 pack?
Two alarms, with mounting hardware and a user guide.