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        Legrand 643090 | Wired 240V Photoelectric Smoke Alarm Surface Mount | 10YR Backup

        The Legrand 643090 is a surface-mounted, hardwired photoelectric smoke alarm built for reliable detection of smouldering fires. It runs on 230–240V AC and includes a sealed 10-year lithium backup battery, ensuring continuous protection even during power outages. Ideal for home safety setups, it allows wired interconnection of up to 20 compatible units for full-system alerts.

        Designed for long-term performance, it features LED indicators for power, alarm, and battery, a large central test/hush button, and a sealed mesh to reduce false alarms from insects or dust. Its white, UV-resistant casing resists yellowing—keeping it looking clean for years.

        Manufactured April 2024 or LATER.

        Legrand 643090 Features

        • Wired interconnection: Connect up to 20 alarms for whole-home coverage.
        • 10-year lithium backup battery: Ensures operation during power outages.
        • Photoelectric detection: Fast response to smoke from smouldering fires.
        • Surface mount design: Easy install on ceiling or wall using screw points.
        • Dust/insect-resistant mesh: Protects the sensor and minimises false alarms.

        643090 FAQ

        Q: Does this alarm work during a power cut?
        A: Yes, the built-in 10-year battery provides backup during outages.

        Q: Can this be wired with other alarms?
        A: Yes, it supports interconnection with up to 20 compatible units.

        Q: What’s the mounting method?
        A: It’s made for surface mounting on ceilings or walls with screws.

        (643090)

        Warranty

        Warranty starts from Invoice Date

        Domestic Use: 5 Year
        Commercial Use: 5 Year
        Warranty Method: Return to Sparky Direct

        Features
        Specification Details
        Catalogue Number 643090
        Colour White
        Supply Voltage 230–240 V ~ 50 Hz
        Power Source Mains powered
        Sensor Type Photoelectric
        Mounting Type Surface (ceiling or wall) - screws
        Interconnect Type Wired (up to 20 interconnected smoke alarms)
        Battery Type Non-replaceable 10 year lithium battery (backup)
        Product Size Ø 148 x 55 mm
        Temperature Range 0°C to +40°C
        Humidity Range 10–95% at 20°C (non-condensing)
        Alarm Volume > 85 dBA at 3 metres
        Recommended Lifespan 10 Years
        Alarm Pattern ISO 8201
        Quality System ISO 9001
        Specifications

        These specifications and characteristics outline physical, mechanical, electrical details.

        Brand Legrand
        SKU 643090
        Model # 643090
        Barcode # 9321001511472
        Package Weight 0.269kg
        Package Width 0.070m
        Package Height 0.155m
        Package Length 0.155m
        TYPE VALUE
        Type Smoke Alarm
        Brand Legrand
        Colour White
        Installation Area Indoor
        Battery Type Non-replaceable 10 year lithium battery
        Supply 230-240 V ~ 50 Hz
        Mount Type Surface Mount
        Interconnect Type Wired/Wireless
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