Description
The Shelly i4 Gen3 is a smart module with 4 inputs, designed for controlling and automating smart home scenarios. Unlike traditional relays, this device does not directly control appliances, but acts as a command controller, transforming standard switches into smart triggers.
With the Shelly i4 Gen3, you can trigger complex scenarios, control other Shelly devices or integrated equipment via HTTP, MQTT or smart home apps.
Thanks to its compact size, it fits easily into a flush-mounted box behind your switches, giving you complete control over your smart home.
Key features
- Smart module with 4 independent inputs
- Ideal for scenarios and automations
- Control via Wi-Fi + Bluetooth
- Works locally and in the cloud
- Compatible with Android, iOS and Amazon Alexa
- Support for MQTT, scripting and webhooks
- Integrated web interface
- BLE Gateway + Wi-Fi extender
- Compact size for flush-mounting
Features and benefits
? Smart scene control
Each input can trigger different actions:
- switch lights on/off
- raise/lower blinds
- complex scenarios (e.g. ‘Leaving home’)
? 4 inputs in a single module - You can turn a standard switch into a fully-fledged controller for your smart home.
? Advanced automation – Enables complex scenarios, integration with MQTT and professional systems.
? Centralised control – Control multiple devices from a single point.
? Simple installation - Installs behind existing switches.
Applications
- Smart home scenario control
- Smart switches (without relay)
- Automation for lighting and blinds
- Centralised device control
- Advanced smart home projects
| General information |
| Model |
Shelly i4 Gen3 (S3SN-0024X) |
| Product type |
4-input smart controller |
| Installation |
In a wall box |
| Outputs |
No (input controller) |
| Inputs |
| Number of inputs |
4 (SW1, SW2, SW3, SW4) |
| Dimensions |
| Dimensions |
37 x 42 x 16 mm |
| Weight |
19 g |
| Power |
| Supply voltage |
110–240 V AC |
| Power consumption |
< 1 W |
| Connectivity |
| Wi-Fi |
802.11 b/g/n |
| Bluetooth |
4.2 |
| Smart features |
| Local control |
Yes |
| Cloud control |
Yes |
| MQTT |
Yes |
| Scripting |
Yes |
| Webhooks |
Yes |
| Compatibility |
| Platforms |
Android, iOS, Amazon Alexa |
| Sensors and protection |
| Temperature sensor |
Yes |
| Overheating protection |
Yes |
| Operating conditions |
| Temperature |
-20°C to +40°C |
