Nabu Casa Inc.
Home Assistant Connect ZBT-2 Zigbee 3.0 Thread USB Adapter EFR32MG24 ESP32-S3
Home Assistant Connect ZBT-2 Zigbee 3.0 Thread USB Adapter EFR32MG24 ESP32-S3
Official Nabu Casa Partner
We offer original products directly from Nabu Casa – the creators of Home Assistant – guaranteed with no intermediaries or reimports. By purchasing from us, you support the development of the open-source smart home ecosystem. All products are authentic, privacy-focused, and cloud-free by design.
Your Home Assistant Connect ZBT-2 Zigbee 3.0 Thread USB Adapter EFR32MG24 ESP32-S3 has been freshly produced for you and is expected to arrive at our warehouse on .
The shipment of your entire order will take place once this item has arrived. If you need other products sooner, please place a separate order.
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The easiest way into the world of Zigbee & Thread
The new Home Assistant Connect ZBT-2 makes it easier than ever to get started with Zigbee or Thread. Thanks to a precisely tuned antenna and the latest MG24-generation chipset, it offers excellent radio performance and exceptional stability.
Based on the open second Connect platform, the ZBT-2 is more powerful, versatile, and better integrated into the home.
Setup and migration take just a few minutes – and you benefit from the full power of Home Assistant, completely without the cloud and with maximum control.
The Connect ZBT-2 connects a variety of devices from the world of Zigbee, Thread, and Matter directly to Home Assistant – without any additional hub.
It is fully open, updatable, and equally interesting for hobbyists and smart home professionals.
Features & Benefits
📡 Optimized Antenna: Provides the best possible connection to Zigbee or Thread devices – even over longer distances.
⚡ Higher Response Speed: Up to 4× faster response times compared to the first generation.
🚀 Maximum Performance: The new MG24 chip ensures the highest stability and performance in daily operation.
🆕 Open Platform: Second Connect generation – open, more powerful, and aesthetically unobtrusive in design.
🛠️ Made for Tinkerers: Completely open, without clips or glue, with accessible pads and pins for your own projects.
🔌 Plug-and-Play: Migration of existing Zigbee or Thread networks via the Home Assistant setup assistant.
🌐 Free Network Choice: Start a new Zigbee or Thread network within minutes.
🧩 Less Device Chaos: Replaces multiple hubs and connects Zigbee, Matter, and Thread devices directly to Home Assistant.
🌎 Wide Device Support: Compatible with proven Zigbee products and the latest Matter devices.
🔗 Maximum Compatibility: Supports ZHA, Zigbee2MQTT, and OpenThread Border Router.
✅ Reliable to the Detail: Developed by the team behind Home Assistant – with regular OTA updates.
📦 Scope of Delivery: Antenna, base, 1.5 m USB cable (USB 2.0 / 3.0), and quick start guide.
Technical Data
Product
Model Number: NC-ZBT-9741
Compliance: CE, FCC, RCM
FCC ID: 2A8ZE04
Origin: Made in China
Product Details
SoCs: Silicon Labs MG24, ESP32-S3 (USB Serial Bridge)
Power Supply and Data: USB-C, 5 V DC, 500 mA
Supported Protocols: Zigbee 3.0, Thread
Antenna Properties
Note: Different building materials and the placement of the device can affect radio range.
Frequency Range: 2400 – 2483.5 MHz
Peak Gain: 4.16 dBi
Transmit Power: 10 dBm (EU), 8 dBm (Rest of the World)
Radiation Pattern: Omnidirectional
Antenna Dimensions: 24 mm diameter, 164 mm height
Device Properties
Dimensions and Weight: 83 × 83 × 179 mm, 157 g | Packed: 227 × 168 × 42 mm, 350 g
Housing Material: Polycarbonate plastic
Colors: White and semi-transparent
Environmental Conditions
Operating Range: Indoor use only
Operating Temperature: 0 °C to +65 °C (Antenna -40 °C to +85 °C) / 32 °F to 149 °F
Humidity: Non-condensing
Recommendation: Use in a dry, dust-free environment and avoid direct sunlight or heat sources.
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˅ Manufacturer
15 Hubble Suite 200
92618 Irvine
Kanada
˅ Responsible Person
Bettinastr. 30
60325 Frankfurt am Main
Deutschland
