Shelly 1 Gen3

Shelly 1 Gen3 — Compact 8A Gen3 WiFi Relay

The Shelly 1 Gen3 (model S3SW-001X8EU) is an ultra-compact third-generation WiFi relay with dry contact (potential-free). Control any electrical circuit up to 8A from the Shelly app, by voice, or automatically. It acts as a Bluetooth gateway and WiFi network extender. No hub or subscriptions needed.

Technical Specifications — Shelly 1 Gen3

• Model: S3SW-001X8EU
• Connectivity: WiFi 802.11 b/g/n (2.4 GHz) + Bluetooth BLE 4.2
• Power supply: 110–240V AC 50/60 Hz
• Maximum load: 8A / 1840W
• Channels: 1 (dry contact, potential-free)
• Operating temperature: -20 to +40°C
• Dimensions: 41 × 36 × 17 mm
• Processor: ESP-Shelly-C3 8F (8 MB Flash)
• Protocols: MQTT, HTTP REST API, WebSockets, Webhooks, Scripting (mJS)
• Certifications: CE, RoHS

Main Features

• Dry contact (potential-free): connect low voltage and 240V circuits without modifying existing wiring
• Integrated Bluetooth Gateway: manage Shelly BLU devices (sensors, remotes) from the same app
• WiFi network extender: automatically extends the coverage of your home automation installation
• mJS scripting: local automations without relying on any cloud service
• Ultra-compact (41×36×17mm): fits into standard junction boxes and behind switches
• Full local control via HTTP REST API, no internet required

Compatible with

• Home Assistant (local, no cloud)
• Amazon Alexa
• Google Home
• MQTT, HTTP REST API, Scripting mJS

Use cases

• Automate lights, blinds, or any electrical circuit from your mobile
• Integrate garage doors, gates, or access control systems
• Heating or air conditioning control in installations with low standby consumption
• BLE Hub for Shelly BLU sensors in home automation installations with Home Assistant

Official Shelly distribution. Shipping from Spain. Official Shelly warranty.