The Connectivity Standards Alliance Announces Zigbee 4.0 and Suzi

Summary

DAVIS, California – November 18, 2025 – The Connectivity Standards Alliance (Alliance) announced today the release of Zigbee 4.0 and Suzi, the new brand for Zigbee’s Sub-GHz feature, two major milestones in advancing the foundation of secure, interoperable, and scalable IoT connectivity with a range of optional features, enabling product manufacturers to choose the specific set that best fits their product’s use case and needs. Together, these innovations mark the next evolution of Zigbee technology, building on decades of proven performance to deliver greater range, reliability, and security across global networks. Strengthening Security, Range, and Interoperability Zigbee 4.0 lays the groundwork for harmonizing traditional Zigbee and Smart Energy devices, delivering greater interoperability across universal networks. This release simplifies certification processes and supports enhanced information exchange, creating a more complete smart home solution. Comprehensive and proactive security updates aligned with evolving international security standards implement cryptographic agility and additional mechanisms to protect the network. Extending its capabilities beyond the 2.4GHz band, Zigbee 4.0 introduces support for the European 800 MHz and North American 900 MHz PHY, providing increased signal strength, range, and coverage. Fully backward compatible with Zigbee 3.0 and Smart Energy, it ensures continuity with more than a billion Zigbee devices already deployed worldwide while introducing improvements to network stability, user experience, and device commissioning in dense networks. Delivering significant security enhancements aligned with evolving global standards, the latest release reinforces Zigbee’s position as a trusted solution for secure, modern connectivity. Advanced capabilities such as Dynamic Link Key, Device Interview, and Smart Energy Authentication Level Control offer greater control and resilience across connected networks. These capabilities strengt...