Shelly Pro 3

Shelly Pro 3 — Professional 3-Channel WiFi Relay with DIN Rail and Ethernet

The Shelly Pro 3 (model SPSW-303XE16EU) is a professional 3-channel smart switch with dry contacts, designed for DIN rail mounting. It combines WiFi, Ethernet (LAN), and Bluetooth BLE 4.2 connectivity for maximum reliability. Control three independent circuits simultaneously. Gen2 Pro generation. No hub or subscriptions.

Technical specifications:

• Model: SPSW-303XE16EU
• Connectivity: WiFi 802.11 b/g/n (2.4 GHz) + Ethernet (RJ45) + Bluetooth BLE 4.2
• Power supply: 110 – 240V AC, 50/60 Hz
• Max load: 16A per channel (dry contacts)
• Channels: 3 independent relay outputs
• Energy metering: No
• Mounting: DIN rail (3 modules)
• Operating temperature: -20 to +40°C
• Certifications: CE, RoHS
• Protocols: MQTT, HTTP REST API, WebSockets, Webhooks, Scripting (mJS)

Key features:

• 3 independent channels with dry contacts: control three circuits simultaneously
• Dual WiFi + Ethernet connectivity for maximum reliability in professional networks
• Bluetooth BLE 4.2 for initial setup without WiFi network access
• Integrated web interface for local control and monitoring
• Integrated overheating protection
• OTA firmware updates

Use cases:

• Control three lighting zones from a single DIN module
• Automation of circuits in offices, hotels, and commercial spaces
• Professional installations with high availability thanks to Ethernet connection
• Control of appliances and high-consumption loads in electrical panels

Compatible with Home Assistant (local, no cloud), Amazon Alexa, Google Home, MQTT, HTTP REST API, and mJS scripting.

• RF Band: 2400 – 2495 MHz
• Max RF Power: <20 dBm
• Wi-Fi Protocol: 802.11 b/g/n
• Wi-Fi Range: Up to 30m indoors / 50m outdoors
• Ethernet: RJ45 Port (LAN)
• Bluetooth Protocol: BLE 4.2
• Bluetooth Range: Up to 10m indoors / 30m outdoors

Resources and documentation:

• Official knowledge base (KB)
• This device
• All Shelly devices and services