Hamilton LEDSTAT LED Dimmer Module - Smart Wi-Fi Rotary 250W

The SD250MW is a smart Wi-Fi connected rotary LED dimmer module rated at 250W (trailing edge), designed as a direct retrofit for both new-build and renovation projects. It connects to your home's 2.4GHz Wi-Fi network without requiring a hub, bridge, or neutral wire — making it fully compatible with standard UK two-wire installations straight out of the box, with no rewiring needed.

Once connected, the module is controlled through the free Hamilton Lite app (iOS and Android), giving you on/off switching, dimming, scene setting and scheduling directly from your smartphone. For hands-free operation, the SD250MW works with both Amazon Alexa and Google Home, allowing you to control your lighting using simple voice commands.

Supplied as a module only — a compatible switch plate with rotary dimmer aperture and a minimum 35mm back box is required separately to complete the installation. Note: the switch plate must be connected to earth.

The SD250MW supports true multi-point dimming, allowing control from up to three switch positions on a single circuit. This makes it ideal for rooms with multiple entry points, staircases, or open-plan living spaces where lighting needs to be managed from more than one location. For dimming control from a second or third switch position — such as the top and bottom of stairs or two room entrances — a compatible companion controller is available separately.

Key Features:

• Smart Wi-Fi (2.4GHz) — no hub, no bridge, no neutral wire required
• 250W/VA trailing edge; 100W/VA leading edge — minimum load 5W/VA
• Hamilton Lite app: on/off switching, dimming, scenes and scheduling
• Amazon Alexa and Google Home voice control compatible
• True multi-point dimming — up to three switch positions per circuit
• Retrofit compatible — fits existing two-way wiring, minimum 35mm back box
• Approved to BS EN 60669-2-1, CE and UKCA — IP20 internal use only
• Module dimensions: H 59.3 × W 23.2 × D 30.5mm — 230V AC, 50Hz

Frequently Asked Questions:

Does the SD250MW require a neutral wire?
No. It works on a standard two-wire connection (live and switched live), compatible with the vast majority of UK homes without rewiring. Consult a qualified electrician if unsure about your existing wiring.

Can I use the SD250MW without the app?
Yes. The rotary knob works as a manual dimmer at all times regardless of Wi-Fi or app connectivity. The Hamilton Lite app (free, iOS and Android) adds scenes, scheduling and voice control but is not required for basic operation.