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Shelly Dimmer Gen3 WiFi Light Controller
The Shelly Dimmer Gen3 is a compact, single-circuit light dimmer that allows precise control of lighting brightness from a smartphone, tablet, computer or home automation system. It works over a Wi-Fi local network without the need for an additional hub, and also supports remote control via the cloud. It can work with or without a neutral wire. The device also offers Wi-Fi signal amplification, interoperability with Bluetooth and BLE Gateway, and a range of automation options, including schedules, scripts and integration with systems like Home Assistant, Google Home, Alexa or SmartThings.
Working with and without a neutral wire
The Shelly Dimmer Gen3 allows installation in both systems with and without a neutral wire, which is key when retrofitting existing installations. For operation without a neutral wire, a Bypass module is required if the load is less than 20 watts - such a solution prevents the lamp from accidentally glowing after it is turned off.
Accurate measurements and protection
When the neutral wire is connected, the device allows the measurement of voltage (180-240 V), current (0-3 A) and energy consumption. These measurements are made with an accuracy of ±5%. In addition, the device is equipped with an internal temperature sensor and short-circuit and overload protection. Note: these functions work properly only when connected with a neutral conductor.
Convenient control and precise dimming
The product supports trailing edge mode, which provides smooth dimming of a wide range of light sources - from LEDs (up to 150 W) to halogen bulbs (up to 200 W) and electronic transformers. Automatic dimmer calibration guarantees a uniform dimming effect regardless of the type of light source. Built-in functions such as minimum and maximum brightness setting, transition time adjustment and night mode allow full control over lighting - both manually and through schedules.
Automation and advanced schedules
Shelly Dimmer Gen3 supports up to 20 schedules and 20 webhooks (with 5 URLs for each). It allows you to create advanced scenarios using scripts and local actions. You can schedule brightness changes, transition times and set automatic light on/off. With support for MQTT, KVS and virtual components, deep integration with advanced building automation systems is possible.
General
| Manufacturer | Shelly |
|---|---|
| Model | DimmerGen3 |
Physical parameters
| Dimensions | 38 x 42.5 x 16.5 mm / 1.50 x 1.67 × 0.65 inches |
|---|---|
| Weight | 24.3 g / 0.86 oz |
| Maximum terminal tightening torque | 0.4 Nm / 3.5 lbin |
| Cable cross section | 0.2 to 2.5 mm² / 24 to 14 AWG (solid, multi-strand, sleeves) |
| Length of stripped wire | 5 to 6 mm / 0.20 to 0.24 in. |
| Mounting | Wall box |
| Housing material | Plastic |
| Case color | Green, print: black |
| Color of connectors | Black |
Environmental conditions
| Operating temperature | -20°C to 40°C / -5°F to 105°F |
|---|---|
| Operating humidity | 30% to 70% RH |
| Maximum altitude. | 2000 m / 6562 ft |
Electrical parameters
| Power supply | 220-240 V~, 50 Hz |
|---|---|
| Power consumption | < 1,5 W |
| No neutral wire | Yes |
| Minimum load without neutral wire and without Bypass | 20 W |
| Dimming type | Trailing edge |
| External protection | 16 A, characteristic B or C, 6 kA breaking capacity, energy limitation class 3 |
| Short-circuit protection | Yes |
Output circuit parameters
| Maximum output power | 200 W |
|---|
Sensors and measurements
| Voltage range (AC) | 180-240 V |
|---|---|
| Accuracy of voltage measurement | ±5% (when used with neutral conductor) |
| Current range (AC) | 0-3 A |
| Accuracy of current measurement | ±5 % (when used with neutral conductor) |
| Internal temperature sensor | Yes |
Wi-Fi
| Protocol | 802.11 b/g/n |
|---|---|
| RF band | 2412-2472 MHz |
| RF power | < 20 dBm |
| Range | Up to 30 m indoors / 50 m outdoors (depending on conditions) |
Bluetooth
| Protocol | 4.2 |
|---|---|
| RF band | 2402-2480 MHz |
| Maximum RF power | < 4 dBm |
| Range | Up to 10 m indoors / 30 m outdoors (depending on conditions) |
Microprocessor unit
| CPU | ESP32 C3 / STM32 G051 |
|---|---|
| Clock frequency | ESP32 C3 - 40 MHz |
| Flash memory | 8 MB |
Firmware features
| Schedules | 20 |
|---|---|
| Webhooks (URL shares) | 20 with 5 URLs per webhook |
| Scripts | Yes |
| MQTT | Yes |
| Advanced scheduling | Yes |
| KVS (Key-Value Store) | Yes |