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
Control devices
InnPro
Shelly
Smart controllers
Smart Home
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