Shelly Dimmer Gen3
What is Shelly Dimmer Gen3?
Smart dimming controller for seamless remote control of dimmable lights and drivers. It can be used with or without a neutral wire. Equipped with our own Shelly chip.
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Wi-Fi operated Bluetooth inclusion, or use it as a Bluetooth gateway.
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No need for neutral: Can be used without a neutral wire. Bypass is required when the device is used without neutral and the load is under 20 W.
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Supported light types: Dimmable LED lamps: up to 150 W Incandescent bulbs: up to 200 W Halogen lamps: up to 200 W Iron-core transformer with low-voltage incandescent lamps: up to 200 VA Dimmable electronic transformers: up to 200 W
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Overload and temperature protection
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Equipped with a new processor & increased flash memory – ESP Shelly
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Designed for installation in a limited space, such as wall mounts, electrical control panels, etc.
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Easy control through the Shelly app, as well as various protocols, platforms, and voice assistants.
*Bypass is required when the device is used without neutral and the load is under 20 W.
Features
Wi-Fi Operated
Connect Shelly Dimmer Gen3 to your Wi-Fi network. No HUB required!

Night Mode
Create comfortable ambient lighting and automatically adjust to your predefined brightness during specific hours of the day.

No neutral required
Shelly Dimmer Gen3 doesn't require a neutral line to provide a full set of dimming functionalities.

Flexible input control
Use it with your existing switches and/or buttons for a fast and convenient control.

Smart Scenes
Set custom scenes by combining Shelly Dimmer Gen3 with your other Shelly devices.

Smart schedules
Set custom schedules based on your daily agenda, or follow the sunrise/sunset and control your lighting accordingly.
Use Cases
Effortless Lighting Retrofit—No Neutral Wire Needed
Automated Lighting Schedules for Perfect Ambiance
Night Mode: Soft Lighting for Peaceful Nights
Instant Dimming Control with a Single or Double Press
Gen3 Series Features

On the Road to Matter
Each Gen3 device is engineered to be upgradable to Matter. The doubled memory, compared to Plus series, guarantees a smooth update process, paving the way for new smart capabilities and integrations. *Dependent on the extent of Matter's functionalities support.

More Memory, More Power
The Gen3 series ensures the quality and reliability of our devices by using our own powerful Shelly chip. Boasting 8MB of memory, this dramatically improves device performance and efficiency. This significant increase in memory not only guarantees smoother and faster operation but also equips the Gen3 series for the introduction of new capabilities.

Unified Control with Virtual Components
The Gen3 Series introduces “virtual components, transforming how you manage and control 3rd party devices. Within the Shelly Smart Control app, you can now create virtual devices, integrating non-Shelly products into a unified control system. This feature provides streamlined control of all your smart devices, regardless of brand, from a single interface.
CAUTION
Installation of certain Shelly devices must be done by a qualified electrician or authorised installer.
Diagrams
With neutral

Without neutral, with Bypass

Terminals |
Wires |
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|---|---|---|---|
L (x2) |
2 live terminals |
L |
Live (220-240 V~) wire |
N |
Neutral terminal |
N |
Neutral wire |
O (x2) |
2 output terminals to the load |
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S1, S2 |
Switch/button input terminals for light control |
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SPECIFICATIONS
Physical | |
Size (HxWxD): |
38x42.5x16.5 mm / 1.50x1.67x0.65 inch |
Weight: |
24.3 g / 0.86 oz |
Screw terminals max torque: |
0.4 Nm / 3.5 lbin |
Conductor cross section: |
0.2 to 2.5 mm² / 24 to 14 AWG (solid, stranded, and bootlace ferrules) |
Conductor stripped length: |
5 to 6 mm / 0.20 to 0.24 in |
Mounting: |
In-wall |
Shell material: |
Plastic |
Shell color: |
Shell: Lime Print: Black |
Connector color: |
Black |
Environmental | |
Ambient working temperature: |
-20 °C to 40 °C / -5 °F to 105 °F |
Humidity: |
30 % to 70 % RH |
Max. altitude: |
2000 m / 6562 ft |
Electrical | |
Power supply: |
220-240 V~ 50 Hz |
Power consumption: |
< 1.5 W |
Neutral not needed: |
Yes |
Min. load without neutral and without a Bypass: |
20 W |
Dimming type |
Trailing edge |
External protection: |
16 A, tripping characteristic B or C, |
Short circuit protection |
Yes |
Output circuits ratings | |
Max. output power: |
200 W |
Sensors, meters* | |
Voltmeter range (AC): |
180 V - 240 V |
Voltmeter accuracy: |
± 5 % (when used with neutral) |
Ammeter range (AC) |
0 A - 3 A, |
Ammeter accuracy: |
± 5 % (when used with neutral) |
Internal-temperature sensor: |
Yes |
*Precise measurement is possible only when used with neutral. | |
Radio | |
Wi-Fi | |
Protocol: |
802.11 b/g/n |
RF band: |
2412 - 2472 МHz |
Max. RF power: |
< 20 dBm |
Range: |
Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors |
Bluetooth | |
Protocol: |
4.2 |
RF band: |
2402 - 2480 MHz |
Max. RF power: |
< 4 dBm |
Range: |
Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors |
Microcontroller unit | |
CPU: |
ESP32 C3 STM32 G051 |
Clock frequency: |
ESP32 C3: 40 Mhz |
Flash: |
8 MB |
Firmware capabilities | |
Schedules: |
20 |
Webhooks (URL actions): |
20 with 5 URLs per hook… |
Scripting: |
Yes |
MQTT: |
Yes |
Advanced schedules: |
Yes |
KVS (Key-Value Store): |
Yes |


















