Shelly Dimmer Gen4

Smart WiFi, Zigbee, and Matter Dimmer for Dimmable Lights

The Shelly Dimmer Gen4 is a multi-protocol smart dimmer designed to control dimmable lighting from an app, voice assistants, or advanced automations. It works with or without a neutral wire and can be installed behind conventional switches without modifying the existing wiring.

It integrates WiFi, Bluetooth, and Zigbee connectivity, in addition to Matter compatibility, facilitating integration with modern home automation platforms.

Main features

• Compatible with WiFi, Bluetooth, Zigbee, and Matter
• Works with or without a neutral wire
• Installation behind conventional switches
• Trailing Edge dimming type
• Compatible with Home Assistant, Alexa, Google Home, Apple Home, and SmartThings via Matter
• Compatible with KNXnet/IP
• Control from the Shelly Smart Control app
• Integrated power metering (with neutral)
• Internal thermal protection

Lighting compatibility

Compatible with dimmable loads:

• Dimmable LEDs: up to 150 W
• Incandescent bulbs: up to 200 W
• Halogen: up to 200 W
• Dimmable electronic transformers: up to 200 W
• Iron core transformers: up to 200 VA

⚠️ Only compatible with dimmable luminaires that support Trailing Edge dimming.

Operation without neutral

The Shelly Dimmer Gen4 can operate without a neutral wire.

⚠️ When installed without a neutral wire and the load is less than 20 W, the Shelly Bypass for Dimmer must be used.

Control and automation

Allows for:

• Dimming the light intensity
• Configuring smooth transitions
• Automating scenes and schedules
• Remote control from a smartphone
• Integration with voice assistants and home automation platforms

Metering and monitoring

Includes:

• Voltmeter
• Ammeter
• Internal temperature monitoring

⚠️ Accurate measurement of electrical parameters is only available when the device is used with a neutral wire.

Technical specifications

Power supply and load

• Power supply: 220–240 V AC / 50 Hz
• Own consumption: < 1.5 W
• Maximum power: 200 W
• Maximum current: 0.85 A

Dimming

• Type: Trailing Edge
• Works with or without neutral
• Minimum load without neutral and without bypass: 20 W

Connectivity

• WiFi
• Bluetooth
• Zigbee
• Matter
• KNXnet/IP

Measurement

• Voltage: 180–280 V AC
• Current: 0–3 A
• Accuracy: ±5% (with neutral)

Dimensions

• 38.5 × 43.5 × 17 mm
• Weight: 24.3 g

Important

⚠️ The Shelly Bypass for Dimmer is mandatory when used without a neutral wire and with loads under 20 W.

⚠️ Only compatible with dimmable lighting.