Home Assistant Connect ZBT-2 Zigbee / Thread adapter, antenna

The Home Assistant Connect ZBT-2 is the easiest way to build a Zigbee or Thread network — now with even better performance and stability. The precisely tuned, high-performance antenna and the latest-generation MG24 radio chip together provide faster response and a stable connection to connected devices. It is built on the open, second-generation Connect platform, making it well-optimized and aesthetically fitting for the home environment.

Setting up and migrating the ZBT-2 is essentially plug play: Home Assistant’s built-in wizard guides you through the initial steps, allowing you to start a new Zigbee or Thread network in minutes or migrate your existing one. It directly connects a wide range of Zigbee 3.0 or Matter (Thread) devices to Home Assistant — without separate hubs.

About the Home Assistant / Nabu Casa brand

Home Assistant is a leading open-source smart home platform offering local, cloud-independent control and extremely broad device support. Nabu Casa Connect products (such as the ZBT-2) are developed closely with the HA engineering team, ensuring first-class integration, continuous updates, and long-term support.

Key product features

• Optimized antenna: tuned for the 2.4 GHz Zigbee/Thread band, delivering excellent signal quality and range.
• Faster response: up to four times speed improvement over the first generation, with consistently better device responsiveness.
• Pure performance: updated Silicon Labs MG24 Zigbee/Thread SoC for maximum performance and stability.
• Open platform: 2nd-generation Connect platform — open, powerful, and blends into living spaces.
• Serviceable design: open, source-friendly, without glue or hidden clips; easily accessible pads and pins.
• Plug Play migration: built-in wizard for easy migration of Zigbee/Thread networks.
• Free network choice: start a new Zigbee or Thread network in minutes.
• Fewer hubs, more order: connects your existing Zigbee, Matter, or Thread devices directly to Home Assistant.
• A world of devices: from proven Zigbee products to the latest Matter devices.
• Power of Home Assistant: broad compatibility on Zigbee and Thread, with OTA updates for major brands.
• Reliability at the core: a device from the team driving Home Assistant development.
• Wide compatibility: ZHA, Zigbee2MQTT, and OpenThread Border Router support.

Smart home protocols and platform compatibility

• Supported protocols: Zigbee 3.0, Thread (to connect Matter over Thread devices).
• Home Assistant integrations: ZHA (Zigbee Home Automation), Zigbee2MQTT, OpenThread Border Router.
• Regions/channels: all Zigbee and Thread regions and 2.4 GHz channels supported.
• OTA updates: OTA updates available from Home Assistant for devices from major manufacturers.

Smart features

• One-step setup: guided onboarding with a wizard.
• Network migration: move existing Zigbee/Thread networks with just a few clicks.
• Local control: cloud-independent, fast, and stable operation within the Home Assistant ecosystem.

Technical specifications

• Model: NC-ZBT-9741
• Certifications: CE, FCC, RCM
• FCC ID: 2A8ZE04
• Origin: China
• System chips (SoC): Silicon Labs MG24 (Zigbee 3.0 Thread), ESP32-S3 (USB–serial bridge)
• Power / data: USB-C, 5 V DC, 500 mA
• Supported protocols: Zigbee 3.0, Thread
• Frequency range: 2400–2483.5 MHz
• Antenna peak gain: 4.16 dBi
• Transmit power: 10 dBm (EU), 8 dBm (rest of world)
• Radiation pattern: omnidirectional
• Antenna dimensions: Ø 24 mm × 164 mm (height)
• Device dimensions/weight: 83 × 83 × 179 mm, 157 g
• Package dimensions/weight: 227 × 168 × 42 mm, 350 g
• Enclosure material/color: polycarbonate; white and semi-transparent elements
• Operating environment: indoor only; 0–65 °C (antenna: −40–+85 °C); non-condensing humidity
• Installation note: building materials and placement significantly affect wireless range; keep in a dry, non-dusty environment; do not expose to direct sunlight or place near heat sources
• Compatibility (software): Home Assistant ZHA, Zigbee2MQTT, OpenThread Border Router
• In the box: antenna, base, 1.5 m USB cable (USB 2.0/3.0), quick guide