Description
Shelly Dimmer Gen3 – Smart Wi-Fi Dimmer for LED & Traditional Lighting
Transform your existing lighting into smooth, intelligent smart lighting with the Shelly Dimmer Gen3.
This compact single-channel trailing-edge smart dimmer provides precise brightness control for compatible LED, halogen and incandescent lighting while supporting installations with or without a neutral wire.
Whether you’re upgrading a single bedroom light, creating automated lighting throughout your home or integrating your existing switches into Home Assistant, the Shelly Dimmer Gen3 provides powerful smart lighting control without requiring a dedicated hub.
With its compact design, advanced dimming functions and direct Wi-Fi connectivity, it is an excellent choice for both new installations and smart-home retrofits.
Key Features & Benefits
💡 Smooth & Precise Smart Dimming
The Shelly Dimmer Gen3 uses trailing-edge dimming technology to provide smooth brightness control for compatible lighting.
Adjust your lights precisely from low-level ambient lighting through to full brightness, making it ideal for:
- LED downlights
- Dimmable LED bulbs
- Halogen lamps
- Incandescent bulbs
- Decorative lighting
- Bedroom lighting
- Living-room lighting
- Dining-room lighting
The dimmer also includes automatic calibration to help optimise performance for the connected lighting load.
🔌 Works With or Without a Neutral Wire
One of the biggest advantages of the Shelly Dimmer Gen3 is its ability to operate without a neutral wire.
This makes it particularly useful for retrofitting smart lighting into older homes where the switch box may only contain Live and switched Live conductors.
With Neutral:
Provides the most complete functionality, including power monitoring and additional protection features.
Without Neutral:
Allows smart dimming in installations where a neutral wire isn’t available.
For loads below 20W when installed without a neutral, the Shelly Bypass is recommended to ensure reliable operation and help prevent flickering or unstable behaviour.
⚡ Supports LED, Halogen & Incandescent Lighting
The Shelly Dimmer Gen3 is designed for a wide range of dimmable lighting technologies.
Maximum ratings include:
- Dimmable LED: up to 150W
- Halogen & incandescent: up to 200W
- Maximum connected load: 200W
Always ensure the connected lamp or driver is specifically designed to support dimming.
📊 Power Monitoring with Neutral
When installed with a neutral wire, the Shelly Dimmer Gen3 can provide real-time electrical measurements.
Monitor:
- Voltage
- Current
- Power consumption
This gives you greater visibility into how much energy your lighting uses and allows energy information to become part of your smart-home automations.
🌐 Wi-Fi Smart Lighting – No Hub Required
The Shelly Dimmer Gen3 connects directly to your Wi-Fi network, eliminating the need for a dedicated hub.
Control your lights through the Shelly ecosystem or integrate the dimmer with compatible smart-home platforms such as:
- Home Assistant
- Google Home
- Amazon Alexa
- Samsung SmartThings
- Other compatible platforms
This allows you to combine conventional wall-switch control with app, voice and automated control.
🏠 Excellent for Home Assistant
The Shelly Dimmer Gen3 is particularly well suited to Home Assistant smart lighting installations.
Use it to create advanced automations such as:
Turn the lights on at sunset.
Dim bedroom lights automatically at night.
Set lights to 30% brightness after a certain time.
Fade lights gradually rather than switching them on instantly.
Create scenes for movie nights, dinners or bedtime.
Because Shelly devices offer extensive local-control capabilities, the Dimmer Gen3 is also an excellent option for users who prefer to keep their smart-home automation on their local network.
🎛️ Advanced Dimming & Lighting Controls
Go beyond simple brightness adjustment with a range of configurable lighting parameters.
The Shelly Dimmer Gen3 supports features such as:
- Minimum brightness adjustment
- Maximum brightness adjustment
- Transition duration
- Automatic calibration
- Gamma correction
- Warm-up function
- Night mode
- Custom lighting behaviour
These settings allow you to fine-tune the dimmer for the specific lights installed in your home.
🔘 Works with Existing Wall Switches
The Shelly Dimmer Gen3 can work with different external switch configurations, allowing you to retain conventional physical control while adding smart functionality.
Depending on the installation, you can use:
- Single-button switches
- Dual-button switches
- Momentary switches
- Existing wall controls
This makes it particularly useful for retrofit smart lighting projects where you don’t want to replace the visible wall switches.
📡 Bluetooth Gateway & Wi-Fi Range Extension
In addition to Wi-Fi connectivity, the Gen3 platform includes Bluetooth functionality, allowing the device to act as a Bluetooth gateway for compatible Shelly BLU devices.
The device can also provide Wi-Fi range-extension functionality, helping expand the capabilities of your wider Shelly installation.
🛡️ Built-In Safety Protections
The Shelly Dimmer Gen3 incorporates multiple protection mechanisms designed to help safeguard the device and connected lighting.
Depending on the installation and configuration, protection features include:
- Overheating protection
- Overcurrent protection
- Overvoltage protection
- Undervoltage protection
- Overpower protection
Some protection and monitoring functions require a neutral connection.
Appropriate external circuit protection should always be provided as required by the installation.
Perfect For
The Shelly Dimmer Gen3 is an excellent choice for:
🏡 Smart Home Retrofits
Upgrade existing lighting without replacing your entire electrical installation.
💡 LED Lighting
Add smart dimming to compatible dimmable LED bulbs and downlights.
🛏️ Bedrooms
Create low-light evening scenes and automated wake-up lighting.
🛋️ Living Rooms
Create adjustable lighting for relaxing, entertaining or watching TV.
🍽️ Dining Areas
Use scenes and gradual transitions to create the right atmosphere.
🏠 Older Homes
The no-neutral capability makes it particularly useful for retrofit installations.
🤖 Home Assistant
Build sophisticated local lighting automations and scenes.
Why Choose the Shelly Dimmer Gen3?
The Shelly Dimmer Gen3 combines the flexibility of a traditional dimmer with the convenience of smart-home automation.
Unlike a simple smart relay that only switches lights on and off, the Dimmer Gen3 gives you precise brightness control, allowing your lighting to become an active part of your smart-home environment.
Its ability to work with or without a neutral wire, compact dimensions and broad integration options make it particularly well suited to smart-home retrofits.
Technical Specifications
| Specification | Shelly Dimmer Gen3 |
|---|---|
| Model | S3DM-0A101WWL |
| Type | Single-channel trailing-edge smart dimmer |
| Maximum Load | 200W |
| Dimmable LED Load | Up to 150W |
| Halogen / Incandescent | Up to 200W |
| Power Supply | 220–240V AC, 50Hz |
| Neutral Wire | Optional |
| Connectivity | Wi-Fi 802.11 b/g/n + Bluetooth 4.2 |
| Power Monitoring | Yes, when installed with neutral |
| Dimming Technology | Trailing Edge |
| Dimensions | 38 × 42.5 × 16.5 mm |
| Weight | Approx. 24.3g |
| Channel | 1 |
| Calibration | Automatic |
| External Switch Support | Yes |
Important Installation Information
The Shelly Dimmer Gen3 is designed for installation on 220–240V AC electrical systems.
A neutral wire is not required for basic operation, making the device suitable for many retrofit installations.
For installations without a neutral wire and loads below 20W, a Shelly Bypass should be used to ensure stable operation and help prevent LED flickering.
Only use the Dimmer Gen3 with compatible dimmable lighting loads. Non-dimmable LED bulbs and incompatible LED drivers may not operate correctly.
Electrical installation should be performed by a suitably qualified person and in accordance with applicable local electrical regulations.
