Shelly 1 Gen4 Smart Switch with Wi-Fi, Zigbee, Matter & Bluetooth
The Shelly 1 Gen4 is a compact, one-channel smart relay switch with dry contact capability, designed to retrofit behind existing wall switches, power sockets, and light switches to add remote control and smart home automation. With multiprotocol connectivity supporting Wi-Fi, Zigbee, Matter, and Bluetooth, this device integrates seamlessly with popular platforms including Google Home, Amazon Alexa, Apple HomeKit, Samsung SmartThings, and Home Assistant. Control lights, appliances, garage doors, fans, heating, and more from anywhere using your smartphone, tablet, or voice assistant.
Why Choose Shelly 1 Gen4?
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Multiprotocol Flexibility: Choose the best protocol for your smart home—Wi-Fi, Zigbee, Matter, or Bluetooth—all in one device
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Matter Certified: Enjoy seamless cross-platform compatibility with Apple HomeKit, Google Home, Alexa, and more
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Improved Performance: Upgraded processor delivers faster responses and smoother automation performance
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High Power Handling: Supports up to 16A at 240V AC or 10A at 30V DC for resistive loads
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Compact Retrofit Design: Fits easily behind standard wall switches and sockets (37 x 42 x 16mm)
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Wide Voltage Support: Works with 110-240V AC, 24-48V DC, or 12V DC power sources
Powerful Smart Home Automation
The Shelly 1 Gen4 enables powerful home automation for a wide range of applications. Control standard lights (LED, incandescent, halogen) with scheduling or motion sensors. Automate bathroom or kitchen ventilation fans based on humidity or occupancy. Manage garage doors, electric locks, and access control systems. Control towel warmers, heaters, and irrigation systems up to 16A switching current. The device includes an embedded web interface for monitoring and control, plus support for custom scripting and KNXnet/IP communication for advanced users.
Universal Smart Home Integration
Connect the Shelly 1 Gen4 to your preferred smart home ecosystem with ease. The device supports local and cloud control, functioning independently in a local Wi-Fi network or through cloud automation services. Integrate with voice assistants for hands-free control. Set custom schedules based on your daily routine, or follow sunrise/sunset automation. Create custom scenes by combining the Shelly 1 Gen4 with other smart devices. The device can be accessed and controlled remotely from anywhere with internet connectivity.
Advanced Features & Protection
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Internal Temperature Sensor: Overheating protection with software thresholds
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Potential-Free Contacts: Dry contact relay for flexible wiring configurations
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Scripting Support: Enhanced functionalities for custom integrations
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Secure Communication: MQTTS, WSS, and TLS support with custom certificates
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OTA Firmware Updates: Regular over-the-air updates via the app or web interface
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RC Snubber Recommended: For inductive or capacitive loads like motors and LED drivers
What's in the Box
- Shelly 1 Gen4 Smart Relay Switch
- Quick Start Guide
- Safety and User Manual
Full Specifications
Physical
| Dimensions (H x W x D) |
37 x 42 x 16mm / 1.46 x 1.65 x 0.63 inch |
| Weight |
26g / 0.92oz |
| Shell Material |
Plastic |
| Shell Colour |
Blue |
| Terminals Colour |
Grey |
| Mounting |
Wall console / Retrofit behind switches |
| Screw Terminals Max Torque |
0.4 Nm / 3.5 lbin |
| Conductor Cross Section |
0.2 to 2.5 mm² / 24 to 14 AWG (solid, stranded, bootlace ferrules) |
| Conductor Stripped Length |
6 to 7 mm / 0.24 to 0.28 in |
Power & Electrical
| Input Voltage |
110-240V AC / 24-48V DC / 12V DC |
| Power Consumption |
< 1 W |
| Max. Switching Voltage |
240V AC / 30V DC |
| Max. Switching Current |
16A at 240V AC / 10A at 30V DC |
| Load Type |
Resistive loads (up to 16A); inductive/capacitive loads require RC snubber |
| Neutral Wire Required |
No |
| External Protection |
Cable protection switch per EN60898-1 (B or C, max 16A, min 6kA) |
Connectivity
| Wireless Protocols |
Wi-Fi, Zigbee, Bluetooth, Matter |
| Wi-Fi Protocol |
802.11 b/g/n |
| Wi-Fi Frequency |
2412 - 2472 MHz |
| Wi-Fi Max RF Power |
< 20 dBm |
| Wi-Fi Range |
Up to 30m / 100ft indoors; 50m / 160ft outdoors (depends on conditions) |
| Bluetooth Protocol |
Bluetooth 4.2 |
| Bluetooth Frequency |
2402 - 2480 MHz |
| Zigbee Support |
Yes (multiprotocol MCU) |
| Matter Certified |
Yes (Matter over Wi-Fi) |
Smart Features
| Control Methods |
Mobile app, web interface, voice assistant, local network, cloud |
| Voice Assistant Support |
Google Assistant, Amazon Alexa, Apple HomeKit (via Matter) |
| Smart Home Platforms |
Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MQTT, KNXnet/IP |
| Scheduling & Automation |
Yes (timers, scenes, sunrise/sunset) |
| Scripting Support |
Yes |
| OTA Firmware Updates |
Yes (via app or web interface) |
| Internal Temperature Sensor |
Yes (overheating protection) |
| Dry Contact (Potential-Free) |
Yes |
Environmental
| Operating Temperature |
-20°C to 40°C / -5°F to 105°F |
| Humidity Range |
30% to 70% RH |
| Max. Altitude |
2000m / 6562ft |
Warranty & Compliance
| Warranty |
3 years manufacturer warranty |
| Certifications |
EU Directive 2014/53/UE, 2014/35/UE, 2014/30/UE, 2011/65/UE compliant |
| Manufacturer |
Shelly Europe Ltd. |
| Device Model |
S4SW-001X16EU |
| Device SSID |
Shelly1G4-XXXXXXXXXXXX |
| BLE Model ID |
0x1028 |
Specifications are sourced from the manufacturer product page and may be updated.
