Shelly 1L Gen3 Smart Wi-Fi Relay Switch for No Neutral Wire Lighting
The Shelly 1L Gen3 is a compact single-channel smart relay designed specifically for lighting control in installations without a neutral wire. Perfect for retrofitting existing switches into smart switches, this innovative device lets you control your lights remotely via Wi-Fi and Bluetooth using the Shelly app, voice assistants like Alexa and Google Assistant, or integrate with popular home automation platforms including Home Assistant, MQTT, and Matter. Operating on 220-240V AC and supporting loads up to 200W, the Shelly 1L Gen3 transforms traditional lighting into a smart, automated system with no rewiring required.
Key Features
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No Neutral Wire Required: Unique design operates without a neutral wire, making it ideal for older homes and installations where neutral wires are unavailable
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Matter Ready: Future-proof with Matter support available via firmware update for seamless smart home integration
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Compact Design: Ultra-compact dimensions of 37 × 42 × 16 mm fit easily into standard electrical wall boxes and behind light switches
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Wi-Fi & Bluetooth Connectivity: Connect to your home Wi-Fi network (2.4GHz) and use Bluetooth for setup and as a gateway for Shelly BLU devices
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Voice Control Compatible: Works with Amazon Alexa and Google Assistant for hands-free voice control
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Remote Access & Automation: Control your lights from anywhere with internet connectivity, set schedules, timers, and create custom automation routines
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Overheating Protection: Built-in internal temperature sensor prevents overheating for safe, reliable operation
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Wide Compatibility: Supports LED, CFL, incandescent, halogen, and luminescent lights with bulbs greater than 5W when used with the included Shelly Bypass
Perfect for Retrofitting
The Shelly 1L Gen3 is engineered with adaptability in mind, allowing you to retrofit any standard wall switch into a smart switch without requiring new cables or extensive rewiring. Simply install it behind your existing light switch in the wall box. The device is compatible with a wide range of light types and is designed to work seamlessly in installations where space is limited. The included Shelly Bypass 1L/2L Gen3 connects in parallel to the load, enabling proper functionality for bulbs greater than 5W in no-neutral setups.
Smart Home Integration
Integrate the Shelly 1L Gen3 into your existing smart home ecosystem with ease. The device supports MQTT, WebSocket, REST API, and Matter protocols, making it compatible with platforms like Home Assistant, OpenHAB, Node-RED, and more. Use the embedded web interface to monitor and fine-tune device settings, or control everything through the intuitive Shelly Smart Control app available for iOS and Android. With over-the-air (OTA) firmware updates, your device stays current with the latest features and security enhancements.
Scheduling & Automation
Create complex automation routines to match your lifestyle. Schedule lights to turn on and off at specific times, set up sunrise/sunset triggers, or create custom scenes that activate multiple devices simultaneously. The Shelly 1L Gen3 supports advanced scripting for power users who want to build sophisticated smart home automations.
What's in the Box
- Shelly 1L Gen3 Smart Relay
- Shelly Bypass 1L/2L Gen3
- Quick Start Guide
Full Specifications
| Model |
S3SW-0A1X1EUL |
| Input Voltage |
220-240V AC, 50/60Hz |
| Maximum Load Power |
200W |
| Maximum Switching Voltage |
240V AC |
| Channels |
1 (Single Channel) |
| Neutral Wire Required |
No (requires Shelly Bypass 1L/2L Gen3) |
| Minimum Bulb Power |
5W (with Bypass) |
| Wi-Fi Frequency |
2.4 GHz (2412-2472 MHz, max 2483 MHz) |
| Bluetooth |
Yes (Bluetooth ID: 0x1014) |
| Processor |
ESP-Shelly-C38F chip (8 MB memory) |
| Smart Home Protocols |
Wi-Fi, Bluetooth, MQTT, WebSocket, REST API, Matter (via firmware update) |
| Voice Control |
Amazon Alexa, Google Assistant |
| Temperature Protection |
Internal temperature sensor for overheating protection |
| Screw Terminal Max Torque |
0.4 Nm / 3.5 lbf·in |
| Conductor Cross Section |
0.5 to 1.5 mm² / 20 to 16 AWG |
| Maximum Altitude |
2000 m / 6562 ft |
| Dimensions (H × W × D) |
37 × 42 × 16 mm (±0.5 mm) / 1.46 × 1.65 × 0.63 in (±0.02 in) |
| Mounting |
Standard electrical wall box, behind light switches |
| Certification |
CE, RoHS, EU Directive 2014/35/EU, 2014/30/EU, 2011/65/EU, 2014/53/EU |
| Warranty |
3 years (Shelly Gen3 devices) |
Specifications are sourced from the manufacturer product page and may be updated.
