Matelec | Photoelectric Smoke Alarm 240V Wired Interconnect | AS 3786:2023 Type A
The Matelec DET-SMK-AC-1 is a 240V mains-powered photoelectric smoke alarm with a 9V alkaline battery backup. It is a Type A detector with dual spectrum sensing, hardwired for interconnection with up to 24 alarms. The DET-SMK-AC-1 mounts to a wall or ceiling and conforms to AS 3786:2023 and AS 3786:2014.
Retrofitting alarms into an occupied home means working around existing ceiling linings and cable runs. The DET-SMK-AC-1 has a base recessed for mains cabling, so the cable lands without a large ceiling cut-away. Its mounting holes line up with standard plaster brackets, and the hinged base opens by push button at fit-off. Dual spectrum sensing reduces nuisance alarming.
Interconnection is wired, and a loop terminal carries the run through each alarm position to a maximum of 24 units. Wall and ceiling mounting are both approved, so a raked ceiling or a beam does not force a change of model. The No Battery, No Close catch stops the base closing with the battery left out. The alarm also carries improved EMI resilience.
Features
- Dual spectrum detection — reduces nuisance alarming while keeping the photoelectric response to smoke.
- 240V hardwired supply — runs on mains power, wired into the ceiling or wall position at rough-in.
- Interconnects up to 24 alarms — the DET-SMK-AC-1 hardwires to as many as 24 alarms on one interconnect.
- 9V battery backup — a 9V battery is included and keeps the alarm working through a mains outage.
- Separate hush and test button — one button covers silencing and routine testing without opening the alarm.
- Hinged detachable base — opens by push button, so the head comes off the base by hand.
- 85dB at 3 metres — sound output measured at 85dB three metres from the alarm.
- LED indicators — power and alarm LEDs show status at a glance from floor level.
- Low battery audible warning — the alarm sounds a low battery warning before the backup battery goes flat.
- Wall locks included — wall locks are supplied in the box with the DET-SMK-AC-1.
- AS 3786 conformance — conforms to AS 3786:2023 and AS 3786:2014, and to ISO 12239:2021.
- 0 to 40 degrees C only — the DET-SMK-AC-1 is rated for that range, and high temperatures shorten battery life.
Where to use
- New residential builds — the 240V hardwired supply suits alarm positions cabled at rough-in on a new dwelling.
- Alarm upgrades and retrofits — the recessed base takes the mains cable without cutting a large hole in the ceiling.
- Whole-home interconnected systems — up to 24 DET-SMK-AC-1 alarms sound together, so a fire in one room wakes the whole house.
- Wall-mounted alarm positions — wall and ceiling mounting are both approved, which covers raked ceilings and beam positions.
- Standard plaster bracket ceilings — the mounting holes line up with plaster brackets already set in the ceiling.
The DET-SMK-AC-1 is rated for 0 to 40 degrees C and 5 to 93 percent humidity, so locations outside that range sit out of scope. High temperatures shorten battery life. Interconnection between alarms is hardwired, so the run needs an interconnect conductor at every alarm position.
