# SONOFF Zigbee Bridge Ultra

*SONOFF / ZBBridge-U*

> The Zigbee Bridge Ultra is the Ethernet and Wi-Fi hub for SONOFF and eWeLink Zigbee devices. It is a Zigbee 3.0 hub that holds up to 256 sub-devices and doubles as a Matter bridge (certified September 2025). It suits HomeKit, Google Home and Alexa users through an integration (a Matter bridge). Home Assistant users reach it through an integration (the maker's hub).

- Canonical page: https://smarthomecanon.com/devices/sonoff-zigbee-bridge-ultra
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [SONOFF](https://smarthomecanon.com/brands/sonoff) |
| Category | Bridge |
| Model numbers | ZBBridge-U |
| Status | Current[^1] |
| Matter device type | withheld |
| Works with | eWeLink app, Matter ecosystems, Home Assistant (MQTT)[^1] |
| Type | Zigbee bridge[^1] |
| Chip | Silicon Labs EFR32MG21[^1] |
| Ships with | unknown |
| Thread RCP firmware | unknown |
| In Home Assistant ZHA docs | unknown |
| In Zigbee2MQTT docs | unknown |
| Connection | Ethernet (RJ45, 10/100) and Wi-Fi 2.4 GHz[^1] |
| Power | 5 V, 1 A (USB-C)[^1] |

## Integration paths

**How the SONOFF Zigbee Bridge Ultra connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Matter via Bridge](https://smarthomecanon.com/protocols/matter-bridged) | A Matter hub on the same local network, such as a HomePod or Apple TV for HomeKit[^1] | Yes[^1] | unknown |
| [Proprietary + hub](https://smarthomecanon.com/protocols/proprietary-gateway) | eWeLink app or local web interface, SONOFF or eWeLink Zigbee sub-devices[^1] | unknown | unknown |

**Platform support for the SONOFF Zigbee Bridge Ultra**

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

## Roles in a smart home

**Infrastructure roles**

| Role | Acts as one |
| --- | --- |
| Thread border router | unknown |
| Matter controller | unknown |
| Zigbee coordinator | Yes[^1] |

## Related pages

- [SONOFF dongles and bridges](https://smarthomecanon.com/lines/sonoff-zigbee-dongles-and-bridges) (line)
- [SONOFF](https://smarthomecanon.com/brands/sonoff) (brand)
- [Matter through a bridge](https://smarthomecanon.com/protocols/matter-bridged) (protocol)
- [Proprietary radio with a hub](https://smarthomecanon.com/protocols/proprietary-gateway) (protocol)
- [HomeKit](https://smarthomecanon.com/platforms/homekit) (platform)
- [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) (platform)
- [Google Home](https://smarthomecanon.com/platforms/google-home) (platform)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)

## Sources

[^1]: SONOFF Zigbee Bridge Ultra product page. https://sonoff.tech/products/sonoff-zigbee-bridge-ultra (manufacturer, checked 2026-10-09)