Description
The SM323-MT module is the bare PCB version of our Matter dimmer – the same proven hardware used in the SM323-MT plate-bundled variants, supplied without a faceplate or knob. Designed for installers and customers who already own a designer wall plate, or who want to retrofit smart control inside an existing UK wall switch.
Communicates via Matter over Thread, bringing native multi-admin support for Apple Home, Google Home, Amazon Alexa and Samsung SmartThings simultaneously. Pair once, control from every ecosystem.
Key features
- Protocol: Matter over Thread (Thread Border Router required)
- Dimmer type: Trailing edge (reverse phase)
- Input voltage: 230 VAC, 50/60 Hz
- Max LED load: 150 W
- Max incandescent / halogen load: 350 W
- Module dimensions: 51 × 26 × 24 mm (fits standard UK 35 mm-deep back boxes)
- Weight: 30 g
- Wiring: Live only, or Live + Neutral if available. Screw terminals accept 1.0–1.5 mm² solid or stranded cable
- Switch type: 2-way (retractive switch only)
- Multi-admin: Apple HomeKit, Google Home, Alexa, SmartThings, Hubitat – all simultaneously via Matter
Ideal for
- Retrofitting existing UK wall switches with smart Matter control
- Installations where you already own a designer faceplate (e.g. Crabtree, Hager, MK)
- Behind blanking plates for hidden smart dimming
- Multi-ecosystem households who want a single device that works with every Matter hub
Looking for the complete switch (module + screwless flat plate + knurled knob)? See the Matter Dimmer Switch family – available in white, grey, black, brushed chrome and brushed antique brass.
Great product, probably a unique product on the market right now. A non-dimmer version would also be great, for dummy dimmer scenarios
The dimmer modules work well. However, what felt like it could have been a 10 minute job was much longer due to the way pairing is done. The pairing and configuration buttons are on the front of the module, which means they can’t be pressed after fitting in place. I wasn’t sure if I might need to pair them again in the future and didn’t fancy playing around with the modules while they were hanging out of the wall. Luckily I have a screwless faceplate, so I used the plastic face of one of the modules as a template to drill access holes for the button, so if I need to press them I only need to pop the faceplate off. Getting that plastic cover off was a pain, though.
A much better way would be something like pressing in the dimmer for 10 seconds to put it into pairing mode.