Shelly Dimmer Gen3 WiFi Light Controller

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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

ManufacturerShellyModelDimmerGen3

 

Physical parameters

Dimensions38 x 42.5 x 16.5 mm / 1.50 x 1.67 × 0.65 inchesWeight24.3 g / 0.86 ozMaximum terminal tightening torque0.4 Nm / 3.5 lbinCable cross section0.2 to 2.5 mm² / 24 to 14 AWG (solid, multi-strand, sleeves)Length of stripped wire5 to 6 mm / 0.20 to 0.24 in.MountingWall boxHousing materialPlasticCase colorGreen, print: blackColor of connectorsBlack

 

Environmental conditions

Operating temperature-20°C to 40°C / -5°F to 105°FOperating humidity30% to 70% RHMaximum altitude.2000 m / 6562 ft

 

Electrical parameters

Power supply220-240 V~, 50 HzPower consumption< 1,5 WNo neutral wireYesMinimum load without neutral wire and without Bypass20 WDimming typeTrailing edgeExternal protection16 A, characteristic B or C, 6 kA breaking capacity, energy limitation class 3Short-circuit protectionYes

 

Output circuit parameters

Maximum output power200 W

 

Sensors and measurements

Voltage range (AC)180-240 VAccuracy of voltage measurement±5% (when used with neutral conductor)Current range (AC)0-3 AAccuracy of current measurement±5 % (when used with neutral conductor)Internal temperature sensorYes

 

Wi-Fi

Protocol802.11 b/g/nRF band2412-2472 MHzRF power< 20 dBmRangeUp to 30 m indoors / 50 m outdoors (depending on conditions)

 

Bluetooth

Protocol4.2RF band2402-2480 MHzMaximum RF power< 4 dBmRangeUp to 10 m indoors / 30 m outdoors (depending on conditions)

 

Microprocessor unit

CPUESP32 C3 / STM32 G051Clock frequencyESP32 C3 - 40 MHzFlash memory8 MB

 

Firmware features

Schedules20Webhooks (URL shares)20 with 5 URLs per webhookScriptsYesMQTTYesAdvanced schedulingYesKVS (Key-Value Store)Yes