Kidde i12040A AC Hardwired Interconnect Smoke Alarm with Hush | 10-Year Warranty

Overview

The Kidde i12040A is a 120V AC hardwired smoke alarm with a built‑in 9V battery backup, designed to guard living spaces using ionization sensing technology. Ionization alarms react to invisible flame particles, while photoelectric units tend to respond to visible smoke. For broader protection, many households pair ionization with a photoelectric model to cover different fire scenarios.

Key advantages at a glance

• Hardwired reliability with battery backup: 120V power plus an included 9V battery ensure continued protection during outages.
• Interconnect capability: connect up to 24 Kidde devices, including other smoke alarms and CO/heat detectors, to create a coordinated safety network.
• Easy operation: a one‑button design handles hush and test functions, with a LED status indicator for quick checks.

Smart features for everyday use

• Hush function: temporarily silences nuisance alarms for about seven minutes, while real smoke will still trigger a response if conditions worsen.
• Dust cover and sensor care: protective cover reduces false alarms during construction or remodeling.
• Memory and interconnect visibility: the initiating unit is indicated in interconnected systems, helping identify the fault source.
• Tamper‑resistant design: helps deter unauthorized tampering; pre‑stripped wiring harness with a cap simplifies installation; tinned conductors improve connections.

Design and installation details

• Large mounting base: protects paint and covers surface imperfections for a clean installation.
• UL Listed with a 10‑year limited warranty: built to perform over time with trusted safety standards.
• One‑button operation: hush and test are straightforward, with battery run‑down protection reducing chirps when AC power is absent.

What’s in the box

One Kidde i12040 120V AC wire‑in smoke alarm, one 9‑volt battery, and installation instructions.

Practical use cases

• Fits homes and multi‑unit properties that benefit from interlinked alerts for synchronized safety.
• Well suited for renovations or new installations requiring a robust hardwired solution.
• Backup battery support helps maintain protection during power interruptions, a common scenario in real life.

Note: For comprehensive coverage, consider pairing ionization detection with a photoelectric model to address different smoke characteristics across rooms.