The Kidde P12040 is a 120V AC hardwired interconnect photoelectric smoke alarm with a Hush feature for silencing nuisance alarms. The photoelectric sensor detects slow-smoldering fires with fewer false alarms from cooking and steam. It operates as a standalone unit or as part of an interconnected system. The 9V battery backup maintains protection during power outages. This model has been replaced by the Kidde 20SAR.
What sensor does the P12040 use?
The P12040 uses a photoelectric sensor, which is more effective for detecting slow-smoldering fires and produces fewer nuisance alarms from cooking compared to ionization alarms. It is well-suited for bedrooms, hallways, and areas near kitchens.
How does the Hush feature work on the P12040?
The single Hush/Test button temporarily silences the alarm during nuisance events like cooking smoke or steam. Press it once to activate Hush. The alarm will automatically reset after a few minutes if smoke clears.
Can the P12040 operate without being interconnected?
Yes. The P12040 can function as a standalone alarm or as part of an interconnected hardwired system. When connected to up to 24 compatible Kidde alarms, all units sound when one detects smoke.
Does the P12040 have battery backup?
Yes. The P12040 includes a 9V battery for backup power during outages. Replace the battery annually or when the low battery warning chirp sounds.
What model replaced the P12040?
The P12040 has been replaced by the Kidde 20SAR, a DETECT-line hardwired smoke alarm with enhanced photoelectric sensing, improved interconnect, and AA battery backup.
# Kidde AC Hardwired Interconnect Photoelectric Smoke Alarm with Hush **Model:** `P12040` **Brand:** Kidde **Category:** Smoke Alarm Hardwired > The Kidde P12040 is a 120V AC hardwired interconnect photoelectric smoke alarm with a Hush feature for silencing nuisance alarms. The photoelectric sensor detects slow-smoldering fires with fewer false alarms from cooking and steam. It operates as a standalone unit or as part of an interconnected system. The 9V battery backup maintains protection during power outages. This model has been replaced by the Kidde 20SAR. ## Specifications | Attribute | Value | |---|---| | Product Type | Smoke Alarm | | Alarm Type | smoke | | Sensor Smoke | photoelectric | | Power Source | hardwired-ac | | Voltage | 120 | | Battery Backup | Yes | | Battery Type | 9V | | Battery Replaceable | Yes | | Voice Alerts | No | | Smart Wifi | No | | App Connected | No | | Ring Ecosystem | No | | Interconnect | Yes | | Interconnect Type | hardwired | | Wire Free Rf | No | | Max Interconnect Devices | 24 | | Max Initiating Devices | 18 | | Self Testing | Yes | | Hush Feature | Yes | | Smart Hush | No | | Strobe | No | | Egress Light | No | | Alarm Db | 85 | | Ul Smoke | UL 217 | | Warranty Years | 10 | ## What's Included - alarm unit - 9V battery - wiring harness - mounting hardware - quick install guide Source: https://www.jaspecs.com/kidde/smoke-alarm-hardwired/p12040-kidde-ac-hardwired-interconnect-photoelectric-smoke-alarm-hush/