---
title: Shelly Smart Dimmer Gen 3 Controller
date: 2025-06-09T13:08:35Z
modified: 2026-05-22T09:50:06Z
permalink: "https://tech.co.za/product/shelly-smart-dimmer-gen-3-controller/"
type: product
status: publish
excerpt: Shelly Smart Dimming Controller for Seamless Remote Control of Dimmable Lights and Drivers
wpid: 541510
product_brand:
  - Shelly
product_type:
  - simple
product_visibility:
  - featured
product_cat:
  - Smart Home
featured_image: "https://tech.co.za/wp-content/uploads/2025/06/SHELLY-DIMMER-GEN3a.png"
---

- Wi-Fi operated Bluetooth inclusion, or use it as a Bluetooth gateway.
- 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.
- 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
- Overload and temperature protection
- Equipped with a new processor & increased flash memory – ESP Shelly
- Designed for installation in a limited space, such as wall mounts, electrical control panels, etc.
- 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._**

### Diagrams

**WIRING**

### With neutral

![](https://shellysa.co.za/wp-content/uploads/2025/06/Dimmer-Gen3-wiring-diagram_with-neutral.png)

### Without neutral, with Bypass

![](https://shellysa.co.za/wp-content/uploads/2025/06/Dimmer-Gen3-wiring-diagram_without-neutral.png)

**LEGEND**



| **Terminals** | **Wires** |  |  |
| --- | --- | --- | --- |
| **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 |  |  |
| **S1, S2** | Switch/button input terminals for light control |  |  |

### SPECIFICATIONS



| **Physical** |  |
| --- | --- |
| Size (HxWxD): | 38×42.5×16.5 mm / 1.50×1.67×0.65 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, 6 kA interrupting rating, Energy limiting class 3 |
| 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 (Depends on local conditions) |
| **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 (Depends on local conditions) |
| **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 |