Kidde 20SAR Hardwired Smoke Detector 3 Pack
- 3 smoke alarms in the pack
- Photoelectric sensor, audible alarm
- 85 decibel alarm, wired interconnect capability
- 10 year limited warranty
- 1.88 x 5 x 5 inches each, white plastic
- Mounting base, screws and user guide included
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A three-pack of photoelectric smoke alarms that interconnect by wire, with LED status lights and a long warranty. It is a home-wiring product, so plan for an electrical hookup.
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ASIN: B0FFVRMPZHModel: 20SARCategory: Smoke Detectors & Fire Alarms
Overview
Not a single battery-only alarm, the Kidde 20SAR is a three-pack of photoelectric smoke detectors powered from the home supply. They link to one another by wire, show status with LED lights and sound an audible alarm.
Buying three at once covers several rooms, and the interconnect feature lets one alarm trigger the others. Hookup relies on home wiring, so confirm your electrical setup first.
Who it's for
Households replacing or adding hardwired alarms in bedrooms and hallways. Anyone without access to home wiring should choose a different type.
Pros and cons
- Three alarms in one pack
- Photoelectric sensing named
- Wired interconnect capability
- Long limited warranty
- Needs home wiring
- Battery backup not stated in specs
- Alarm count fixed at three per pack
Performance notes
A photoelectric sensor responds to smoke particles scattering light in its chamber, and interconnect wiring passes the alarm to every unit so all sound together. LED lights show status, and the audible horn sets how well it is heard through a home.
Where it stands among smoke detectors & fire alarms
- #6 most-searched brand and model of the 33 smoke detectors & fire alarms lines we track (by search demand, not sales).
From the specs of the 45 smoke detectors & fire alarms we list; not a test result.
Specifications
| Brand | Kidde |
|---|---|
| Model | 20SAR |
| Dimensions & fit | |
| Item Dimensions D X W X H | 1.88 x 5 x 5 inches |
| Capacity & performance | |
| Upper Temperature Rating | 100 °F |
| Power & efficiency | |
| Power Source | Corded electric |
| Construction & materials | |
| Enclosure Material | Plastic |
| Color | White |
| Included components | |
| Unit Count | 3 |
| Warranty & support | |
| Manufacturer Warranty Description | 10-year limited warranty |
| Other details | |
| Sensor Type | Photoelectric |
| Alarm | Audible |
| Product Style | 9th edition |
| Mfr Part Number | 21033883 |
| Builtin Media | Mounting base, mounting screws, three alarms, user guide |
| Item Highlight | Wired interconnect capability, LED status lights, 85 dB alarm |
| Item Type Name | Smoke Detectors |
| Operating Humidity | Up to 95% relative humidity (RH), non-condensing |
Frequently asked questions
What is in the Kidde 20SAR box?
Three alarms, mounting bases, mounting screws and a user guide are listed.
Does the Kidde 20SAR link alarms together?
Yes. Wired interconnect capability is part of the listing's highlights.
How loud is the Kidde 20SAR?
The listing states an 85 decibel alarm.