The Shelly Dimmer Gen3 is the WiFi smart light dimmer that transforms any light fixture into dimmable and automatable lighting, without changing your switches. Its great advantage is that it works with or without a neutral wire, making it perfect for both modern installations and older homes. It uses trailing edge dimming, which is most suitable for dimmable LED bulbs, eliminating flickering and brightness jumps. With the new 8 MB Gen3 chip, it offers fast local automations and dynamic scenes —sunrise/sunset, night mode, or courtesy light with motion detection— all in a compact format that fits behind the switch.
Why choose the Shelly Dimmer Gen3?
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With or without neutral: suitable for any installation (a Bypass is required without neutral for loads under 20 W).
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Trailing edge dimming: compatible with a wide range of dimmable LEDs, without flickering or brightness jumps.
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Consumption measurement: monitors the actual power consumption of your lighting (available when installed with neutral).
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No HUB or subscriptions: works on your 2.4 GHz WiFi network and Bluetooth.
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Scenes and automations: sunrise/sunset, night mode, weekly scheduling, and mJS scripting.
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Compatible with everything: Alexa, Google Home, Home Assistant, SmartThings, and apps for iOS and Android.
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Integrated protection: against overheating and overload.
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3-year manufacturer's warranty.
Key Features
- 1-channel WiFi and Bluetooth smart dimmer
- Trailing edge dimming for LEDs, halogens, and incandescents
- Works with or without a neutral wire
- Power consumption measurement (with neutral)
- No HUB required
- WiFi range extender and Bluetooth Low Energy (BLE) gateway
- Compatible with Alexa and Google Home
- App for iOS and Android
Technical Specifications
| CPU |
ESP-Shelly-C38F |
| Flash |
8 MB |
| Power Supply |
110 - 240 VAC ±10%, 50/60 Hz |
| Power Consumption |
< 1.5 W |
| Dimming Type |
Trailing edge |
| Dimmable LED |
Up to 150 W |
| Incandescent & Halogen |
Up to 200 W |
| Electronic / Ferromagnetic Transformer |
Up to 200 W / 200 VA |
| Minimum Load without Neutral and without Bypass |
20 W |
| Consumption Measurement |
Yes (with neutral only) |
| Works without Neutral |
Yes (Bypass required for loads < 20 W) |
| Protection |
Temperature and Overload |
| External Protection |
16 A |
| Communication |
WiFi 2.4 GHz
Bluetooth 4.2 |
| BLE Gateway |
Yes |
| WiFi Range Extender |
Yes |
| Mounting |
Wall / Ceiling |
| Material |
Plastic |
| Working Temperature |
-20°C to 40°C |
| Humidity |
30% to 70% RH |
| Range |
Up to 30 m indoors and 50 m outdoors |
| Scripting (mJS) |
Yes |
| MQTT |
Yes |
| Encryption |
Yes (TLS 1.2) |
| Weekly Scheduling |
Yes |
| Channels |
1 |
| Measurements |
38 x 42.5 x 16.5 mm |
| Weight |
24 g |
