Wireless SoC achieves PSA Level 4 certification

Silicon Labs has announced that its Series 3 Secure Vault security subsystem on the SiXG301 system-on-chip (SoC) has achieved the industry’s first PSA Level 4 certification, the highest security level recognized by PSA Certified. The SiXG301 wireless SoC is the first device in the company’s Series 3 portfolio.

PSA Certified’s Level 4 certification and its two designations, iSE/SE for secure elements and ROT for Root of Trust, address the complexity of physical attacks on embedded devices. Level 4 validates resilience against laser fault injection, side-channel attacks, microprobing, and voltage manipulation, Silicon Labs said.

Silicon Labs collaborated with Keysight Technologies to validate Secure Vault on Series 3 for PSA Level 4. The company has led the industry in PSA milestones. For example, the MG21 SoC was the industry’s first device to earn PSA Level 3 certification for protection against physical tampering and its SoCs were also the industry’s first to reach PSA Levels 1 and 2.

PSA Certified certification timeline for Silicon Labs' wireless SoCs.

(Source: Silicon Labs)

The SiXG301 wireless SoC is optimized for line-powered IoT devices. The SiXG301 families will initially include “M” devices for multiprotocol (SiMG301 and SiMG302), and “B” devices optimized for Bluetooth LE communications (SiBG301 and SiBG302).

Silicon Labs' Series 3 SiXG301 wireless SoC.

(Source: Silicon Labs)

“When combined with over-the-air firmware and software updates and real-time monitoring, Series 3 Secure Vault and the SiXG301 exemplify security as an ongoing lifecycle, not a one-time event,” Silicon Labs said.

The Series 3 platform is built on the advanced 22-nanometer process node, enabling higher performance and efficient devices across a range of IoT applications. All Series 3 devices will feature enhanced security. The SiXG301 will be the first to market with PSA Level 4 certification. It will be available to the general industry in the third quarter of 2025.

With the EU’s Radio Equipment Directive (RED) regulations now in effect as of August 1, 2025, Secure Vault, when properly implemented, will provide the features to meet compliance, the company said. Silicon Labs is hosting an upcoming webinar, Stay Ahead of Global IoT Security Regulations with Silicon Labs, to help developers integrate RED-ready security into their products. Developers can register here.

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