Shelly Pro 3 - for DIN rail mountable 3-channel smart relay

Shelly PRO 3

Shelly Pro 3 is a professional DIN rail-mounted 3-channel smart relay with potential-free (dry) contacts, suitable for home, commercial and industrial automation. It controls three independent circuits, and thanks to its potential-free contacts it can be used to switch a wide range of voltages and devices.

The relay supports both LAN (Ethernet) and Wi-Fi connectivity for stable and secure operation. Local control, a built-in web interface and broad integration support (e.g. MQTT and REST API) make it easy to connect the device to existing smart home or building automation systems.

Shelly Pro series devices are built for reliability: they feature advanced security functions and are designed for continuous operation in a distribution board. The device is an ideal solution for smart control of lighting, heating, ventilation, pumps and other electrical equipment.

Specifications

Parameter	Value
Product type	3-channel smart relay
Mounting	DIN rail
Number of channels	3
Relay type	Potential-free (dry) contacts
Maximum load	up to 16 A per channel
Supply voltage	110–240 V AC, 50/60 Hz
Connectivity	Wi-Fi 2.4 GHz, Ethernet (LAN), Bluetooth
Wi-Fi standard	802.11 b/g/n
LAN	RJ45 (10/100 Mbps)
Bluetooth	Yes (for setup)
Control	Web interface, mobile app, API
Protocols	MQTT, HTTP/HTTPS, REST API
Scripting	Yes (mJS)
Schedules	Yes
Operating temperature	-20 °C to +40 °C
Housing	Plastic
Dimensions	approx. 90 × 52 × 58 mm
Safety features	Overheating protection, secure connection
Use	Indoor installation

User manual: Shelly Pro 3 multilingual printed user and safety guide.pdf Manufacturer's website: Shelly PRO 3