Shelly 1 Mini Gen3 Ultra-Compact Wi-Fi Smart Relay Switch
The Shelly 1 Mini Gen3 is the world's smallest Wi-Fi relay switch, designed for seamless smart home automation. This ultra-compact smart switch with potential-free contacts allows you to remotely control lights, garage doors, irrigation systems, and small appliances through your mobile phone, tablet, or home automation system. With 8A switching capacity at 240V AC and 5A at 30V DC, it delivers powerful performance in a miniature form factor measuring just 29 × 35 × 16 mm. Equipped with an advanced Shelly ESP processor featuring 8MB of memory, the Gen3 series offers improved responsiveness, enhanced power efficiency, and Matter certification for future-proof smart home integration.
Key Features
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World's Smallest Wi-Fi Relay: At just 19 grams and 29 × 35 × 16 mm, it fits behind any wall switch or socket
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No Hub Required: Connects directly to your Wi-Fi network (802.11 b/g/n) for standalone operation
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Powerful Switching: Handles up to 8A at 240V AC (2000W) or 5A at 30V DC (150W)
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Potential-Free Contacts: Dry contact relay allows switching of various voltage levels independent of power supply
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Gen3 Enhancements: Advanced Shelly chip with 8MB memory, doubled from Plus series, for smoother performance
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Matter Certified: Upgradable to Matter protocol for universal smart home compatibility
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Voice Control Ready: Works with Alexa, Google Home, and Samsung SmartThings
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Scripting Support: Supports mJS (microJavaScript), webhooks, MQTT, WebSocket, HTTPS, and custom automation
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Bluetooth 4.2: Quick pairing via Bluetooth and BLE gateway functionality for Shelly BLU devices
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3-Year Warranty: All Gen3 devices include a comprehensive 3-year warranty
Advanced Smart Home Automation
The Shelly 1 Mini Gen3 transforms ordinary electrical devices into smart, connected appliances in minutes. Control your lights, fans, garage doors, valves, or low-voltage devices from anywhere in the world through the Shelly Smart Control app. Create custom schedules based on time of day, sunrise/sunset, or sensor inputs. Combine multiple Shelly devices to build sophisticated scenes and automation routines tailored to your lifestyle.
Versatile Installation & Compatibility
Small enough to retrofit into standard electrical wall boxes, the Shelly 1 Mini Gen3 installs discreetly behind power sockets, light switches, or in tight spaces. Its potential-free (dry) relay contacts make it ideal for controlling devices at different voltage levels, from low-voltage garage door openers to standard 240V AC lighting circuits. The device operates on 110-240V AC power supply and features screw terminals compatible with 0.2 to 2.5 mm² conductors.
Home Assistant & Platform Integration
Perfect for advanced users and DIY smart home enthusiasts, the Shelly 1 Mini Gen3 offers local control without reliance on cloud services. It integrates seamlessly with Home Assistant, providing MQTT support, a built-in web interface, and REST API access. The Gen3 series introduces virtual components, allowing you to integrate non-Shelly devices into a unified control system through the Shelly Smart Control app.
Gen3 Innovation
The third-generation Shelly devices represent a significant upgrade from the Plus series. Using Shelly's proprietary ESP chip with doubled memory capacity, Gen3 ensures smooth firmware updates and room for future features. The increased processing power delivers faster response times and better power efficiency. Gen3 devices are engineered to be upgradable to the Matter protocol, ensuring long-term compatibility with emerging smart home standards.
What's in the Box
- Shelly 1 Mini Gen3 Wi-Fi Smart Relay Switch
- User and safety guide
Full Specifications
Physical
| Dimensions (H × W × D) |
29 × 35 × 16 ±0.5 mm (1.11 × 1.35 × 0.63 in) |
| Weight |
19 ±1 g (0.65 oz) |
| Mounting |
Standard wall box |
| Shell Material |
Plastic |
| Shell Color |
Blue |
| Conductor Cross Section |
0.2 to 2.5 mm² (24 to 14 AWG) |
| Screw Terminal Torque |
0.4 Nm (3.5 lbin) |
Electrical
| Power Supply |
110-240V AC, 50/60 Hz |
| Power Consumption |
<1.2 W |
| Relay Type |
Dry contact, normally open (NO), 1-pole, potential-free |
| Max Switching Voltage |
240V AC / 30V DC |
| Max Switching Current |
8A at 240V AC / 5A at 30V DC |
| Max Output Power |
2000W at 240V AC / 150W at 30V DC |
| External Protection |
10A max, tripping characteristic B or C, 6kA interrupting rating, energy limiting class 3 |
Wireless Connectivity
| Wi-Fi Protocol |
802.11 b/g/n (2.4 GHz only) |
| Wi-Fi Range |
Up to 50m outdoors / 30m indoors (depending on construction) |
| Bluetooth |
Bluetooth 4.2 BLE |
| Bluetooth Range |
Up to 30m outdoors / 10m indoors |
| RF Power |
<20 dBm |
| BLE Gateway |
Yes (bridges Shelly BLU devices) |
Smart Features
| Voice Assistants |
Amazon Alexa, Google Home, Samsung SmartThings |
| Home Automation |
Home Assistant, local control, cloud services |
| Protocols Supported |
mJS scripting, webhooks, MQTT, WebSocket, HTTPS, UDP, TLS, custom certificates |
| Control Interface |
Shelly Smart Control app, embedded web interface, REST API |
| Scheduling |
Time-based, sunrise/sunset, weekday/weekend |
| Matter Support |
Yes (upgradable via firmware update) |
| Virtual Components |
Yes (integrate 3rd party devices) |
| Internal Temperature Sensor |
Yes |
Environmental
| Operating Temperature |
-20°C to 40°C (-5°F to 105°F) |
| Humidity |
30% to 70% RH |
| Max Altitude |
2000 m (6562 ft) |
Warranty & Compliance
| Warranty |
3 years |
| Certifications |
CE, RoHS, EU Declaration of Conformity (2014/53/EU, 2014/35/EU, 2014/30/EU, 2011/65/EU) |
| Manufacturer |
Shelly Europe Ltd., Sofia, Bulgaria |
| Model Number |
S3SW-001X8EU |
Specifications are sourced from the manufacturer product page and may be updated.
