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Shelly Dimmer Gen3
Shelly Dimmer Gen3
Shelly Dimmer Gen3
Shelly Dimmer Gen3
Shelly Dimmer Gen3

Shelly

Shelly Dimmer Gen3

SKU 3800238070526

For dimming a light from the switch you already have, even with no neutral. The Shelly Dimmer Gen3 is trailing-edge and rated up to 200 W.

Manufacturer: Shelly
£36.82 inc VAT

Key features

Wi-Fi Bluetooth
  • Measures power and energy on the circuit
  • No neutral wire required
  • Wi-Fi and Bluetooth connectivity
  • Powered from 220-240 V~ 50 Hz
  • Up to 20 schedules, plus scripting, MQTT and webhooks
  • Overheating protection
  • Fits in a wall box behind the switch
  • Set up and run from the Shelly Smart Control app
Product details Manual

Why Shelly Dimmer Gen3

The Shelly Dimmer Gen3 is trailing-edge and rated up to 200 W

Energy metering

Reads the power drawn on the circuit and keeps the energy total, so the app shows what each load uses.

No neutral needed

Fits switch boxes that only have a live feed, which is common in older UK homes.

Connectivity

Connects over Wi-Fi and Bluetooth. Setup runs from the phone, then the device joins the home network.

Local automation

Up to 20 schedules, scripting, MQTT and webhooks run on the device itself, so routines keep working if the internet drops.

Built-in protection

Overheating protection cuts the output before the device or the load is put at risk.

Hidden install

Small enough to sit in the wall box behind an existing switch, so the room looks the same.

What the Shelly Dimmer Gen3 does

The Shelly Dimmer Gen3 is a trailing-edge smart dimmer for dimmable lights, with no neutral needed.

Good for:

  • Dimmable LED and halogen lighting
  • Dimming from the existing switch and the app
  • Rooms without a neutral at the switch

Key facts

  • Max. power: 200 W
  • Dimming: Trailing edge
  • Neutral wire: Not needed
  • Min. load without neutral or Bypass: 20 W

Works with

Runs from the Shelly Smart Control app and works with Amazon Alexa, Google Home and Home Assistant, with no hub needed. Connectivity: Wi-Fi, Bluetooth.

Pairs well with

Also consider

Browse Relays & dimmers, all Shelly and what Shelly is.

Guide: Shelly 1L vs Mini: no-neutral UK light switches

Questions

Does the Shelly Dimmer Gen3 need a neutral wire?

No. Without a neutral or a Shelly Bypass the minimum load is 20 W.

Do I need a hub for the Shelly Dimmer Gen3?

No. It connects to your home Wi-Fi directly.

Should an electrician fit it?

We recommend a qualified electrician for anything connected to mains wiring. The manual is linked on this page.

Will the Shelly Dimmer Gen3 fit in a UK back box?

The body measures 38 x 42.5 x 16.5 mm. Whether it fits depends on the box depth and the cables already in it.

What's the maximum load?

It is rated up to 200 W.

Shelly Smart Control

One free app for every device

This device is added and run from Shelly Smart Control, the free app for iPhone and Android.

  • Rooms, groups and scenes for the whole home
  • Live power readings on devices that measure energy
  • Control away from home, or keep it on the local network
Download on theApp Store Get it onGoogle Play

iPhone needs iOS 15 or later. The app is published by Shelly.

Shelly Smart Control on two phones, showing room energy use and live device status.