# SONOFF S40 Wi-Fi

*SONOFF / S40TPA, S40TPB, S40TPA Lite, S40TPB Lite*

> The S40 Wi-Fi (S40TPA and S40TPB, plus the S40 Lite versions) is a compact plug that joins Wi-Fi. It works with Alexa and Google Home, comes in Type A and Type B, and can show energy use in the Alexa Energy Dashboard. It suits HomeKit, Google Home, Alexa, SmartThings and Home Assistant users through an integration (a Matter bridge).

- Canonical page: https://smarthomecanon.com/devices/sonoff-s40-wi-fi
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [SONOFF](https://smarthomecanon.com/brands/sonoff) |
| Category | Plug |
| Model numbers | S40TPA, S40TPB, S40TPA Lite, S40TPB Lite |
| Status | Current[^1] |
| Radio | Wi-Fi 2.4 GHz[^1] |
| Plug type | Type A and Type B[^1] |
| Max load | 1800 W (Type B), 1500 W (Type A)[^1] |
| Energy monitoring | Through the Alexa Energy Dashboard[^1] |
| Zigbee router | unknown |

## Integration paths

**How the SONOFF S40 Wi-Fi connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Matter via Bridge](https://smarthomecanon.com/protocols/matter-bridged) | eWeLink CUBE OS Matter bridge[^1] | Yes[^1] | unknown |
| [Wi-Fi local](https://smarthomecanon.com/protocols/wifi-local) | eWeLink app, Phone and plug on the same local network[^1] | Yes[^1] | unknown |
| [Wi-Fi cloud](https://smarthomecanon.com/protocols/wifi-cloud) | eWeLink app[^1] | unknown | unknown |

**Platform support for the SONOFF S40 Wi-Fi**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Matter via Bridge | [HomeKit](https://smarthomecanon.com/platforms/homekit) | Via integration[^1] |  |
| Matter via Bridge | [Google Home](https://smarthomecanon.com/platforms/google-home) | Via integration[^1] |  |
| Matter via Bridge | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Via integration[^1] |  |
| Matter via Bridge | [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) | Via integration[^1] |  |
| Matter via Bridge | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | Via integration[^1] |  |
| Wi-Fi local | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | Via integration[^1] | eWeLink add-on (LAN control) |
| Wi-Fi cloud | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Via integration[^1] |  |
| Wi-Fi cloud | [Google Home](https://smarthomecanon.com/platforms/google-home) | Via integration[^1] |  |

## Related pages

- [SONOFF smart plugs](https://smarthomecanon.com/lines/sonoff-plugs) (line)
- [SONOFF](https://smarthomecanon.com/brands/sonoff) (brand)
- [Matter through a bridge](https://smarthomecanon.com/protocols/matter-bridged) (protocol)
- [Wi-Fi with local control](https://smarthomecanon.com/protocols/wifi-local) (protocol)
- [Wi-Fi through a cloud service](https://smarthomecanon.com/protocols/wifi-cloud) (protocol)
- [HomeKit](https://smarthomecanon.com/platforms/homekit) (platform)
- [Google Home](https://smarthomecanon.com/platforms/google-home) (platform)
- [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) (platform)
- [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) (platform)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)

## Sources

[^1]: SONOFF store: SONOFF iPlug Series Wi-Fi Smart Plug – S40 & S40 Lite. https://sonoff.tech/products/sonoff-iplug-series-wi-fi-smart-plug-s40-s40-lite (manufacturer, checked 2026-10-10)