Shelly Dimmer Gen4 Smart Single-Channel Dimming Controller with Power Measurement

The Shelly Dimmer Gen4 is a powerful, compact smart dimming controller designed to bring full lighting control into any space, without the need to rewire your home. Whether you have a neutral wire or not, it installs neatly behind your existing switches, instantly transforming traditional lighting into a fully automated, smart system. With support for WiFi, Bluetooth, Zigbee, and Matter, it integrates effortlessly into virtually any smart home setup, giving you complete flexibility now and in the future.

Engineered for precision, the Shelly Dimmer Gen4 allows you to fine-tune every aspect of your lighting. Adjust brightness levels, set custom fade rates, and control transition times to create exactly the atmosphere you want, whether it’s a soft evening glow or full brightness for productivity. It supports a wide range of dimmable lighting types, from LEDs to halogen, and even offers automatic calibration to ensure smooth, flicker-free dimming across the entire range. With built-in protections, scripting capabilities, and detailed scheduling options, it’s as suitable for advanced automation setups as it is for simple everyday use.

• Multiprotocol connectivity: WiFi, Bluetooth, Zigbee, and Matter

• Works with or without a neutral wire (bypass required under 20 W)

• Precise dimming control with adjustable fade rate and transition time

• Compatible with dimmable LEDs, halogen, and incandescent

• Compact design for easy retrofit behind existing switches

• Supports smart schedules, scenes, scripting, and local automations

• Works with Home Assistant, Alexa, Google Home, Apple HomeKit, and more

From upgrading existing lighting without changing your setup, to creating dynamic schedules that follow your daily routine or the natural daylight cycle, the Shelly Dimmer Gen4 adapts effortlessly to your needs. Whether in a home, office, or hospitality setting, it delivers smooth, intelligent lighting control that enhances comfort, efficiency, and ambience, all from a device you’ll never even see.

*Constant-voltage dimmable drivers are not supported.

Specifications

Power

Power Supply: 220-240V~ 50Hz

Power consumption: < 1.5W

Works without neutral: Yes

Min. load without neutral and without a Bypass: 20W

Dimming type: Trailing edge

Max. output power: 200W

External protection:

16A, tripping characteristic B or C

6kA interrupting rating

Energy limiting class 3

Features

Ambient working temperature: -20°C to 40°C / -5°F to 105°F

Humidity: 30% to 70% RH

Voltmeter range: 180V - 240V AC

Voltmeter accuracy: ±5% (when used with neutral)

Ammeter range: 0A - 3A

Ammeter accuracy: ±5% (when used with neutral)

Supported load types:

Dimmable LED lamps: up to 150W

Incandescent bulbs: up to 200W

Halogen lamps: up to 200W

Iron-core transformer with low-voltage incandescent lamps: up to 200VA

Dimmable constant-current electronic transformers: up to 200W

Connectivity

WiFi protocol: 802.11 b/g/n/ax (2.4 GHz)

WiFi RF band: 2401 - 2483 МHz

WiFi max. RF power: < 20dBm

WiFi Range (depending on local construction):

Up to 50m/160ft outdoors

Up to 30m/100ft indoors

Bluetooth protocol: 5.0

Bluetooth RF band: 2400 - 2483.5 MHz

Bluetooth max. RF power: < 4dBm

Bluetooth Range (depending on local construction):

Up to 30m/100ft outdoors

Up to 10m/33ft indoors

Zigbee Protocol: 802.15.4

Zigbee Repeater: Yes

Zigbee RF bands: 2400 to 2483.5 MHz

Zigbee Range (depending on local construction):

Up to 300m outdoors

Up to 100m indoors

Dimensions

(H x W x L): 38x42.5x16.5 mm / 1.50x1.67x0.65 inch