# Somfy Sonesse 40 Zigbee 404S2 with Fast Connector

*Somfy / 1245920*

> The Sonesse 40 Zigbee 404S2 with Fast Connector is a wired 120 V AC motor for interior shades, blinds and projection screens, rated 42 dB. It suits Home Assistant users, with native support through Zigbee. HomeKit, Google Home and Alexa users reach it through an integration (the maker's hub).

- Canonical page: https://smarthomecanon.com/devices/somfy-sonesse-40-zigbee-404s2-with-fast-connector
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Somfy](https://smarthomecanon.com/brands/somfy) |
| Category | Shade motor |
| Model numbers | 1245920 |
| Status | Current[^1] |
| Type | Roller shade motor[^1] |
| Power | Wired, 120 V AC[^1] |
| Key spec | 42 dB, 95 W in operation[^1] |
| Works with | TaHoma switch[^1] |

## Integration paths

**How the Somfy Sonesse 40 Zigbee 404S2 with Fast Connector connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Zigbee](https://smarthomecanon.com/protocols/zigbee) | unknown | unknown | unknown |
| [Proprietary + hub](https://smarthomecanon.com/protocols/proprietary-gateway) | Somfy TaHoma switch[^1] | unknown | unknown |

**Platform support for the Somfy Sonesse 40 Zigbee 404S2 with Fast Connector**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Zigbee | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | withheld | zigbee2mqtt |
| Proprietary + hub | [HomeKit](https://smarthomecanon.com/platforms/homekit) | Via integration[^1] |  |
| Proprietary + hub | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Via integration[^1] |  |
| Proprietary + hub | [Google Home](https://smarthomecanon.com/platforms/google-home) | Via integration[^1] |  |

## Related pages

- [Somfy Zigbee shading](https://smarthomecanon.com/lines/somfy-zigbee-shading) (line)
- [Somfy](https://smarthomecanon.com/brands/somfy) (brand)
- [Zigbee](https://smarthomecanon.com/protocols/zigbee) (protocol)
- [Proprietary radio with a hub](https://smarthomecanon.com/protocols/proprietary-gateway) (protocol)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)
- [HomeKit](https://smarthomecanon.com/platforms/homekit) (platform)
- [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) (platform)
- [Google Home](https://smarthomecanon.com/platforms/google-home) (platform)

## Sources

[^1]: Sonesse 40 Zigbee 404S2 with Fast Connector (1245920) - Somfy Systems. https://www.somfysystems.com/en-us/products/1245920/sonesse-40-zigbee-404s2-with-fast-connector (manufacturer, checked 2026-10-20)