ZUG, Switzerland, June 9, 2026 – Infineon Technologies will supply silicon carbide (SiC) power modules to Siemens for SENTRON 3QD2 semiconductor circuit breakers, bringing electrical protection to data centers, production facilities, and battery storage systems. Siemens will integrate the modules into its protection hardware to support higher power density, faster fault response, and stable operation in power-critical environments.
“AI data centers and factories are becoming increasingly electrified and complex. This increases vulnerability to electrical failures and drives the demand for more sustainable, efficient and reliable power distribution systems,” said Andreas Weisl, executive vice president & chief sales officer of industrial and infrastructure at Infineon. “By combining our advanced silicon carbide technology with Siemens’ expertise in power distribution, we are addressing this demand to ensure fast, safe and reliable operations in power-critical environments.”
A semiconductor circuit breaker, also known as a solid-state circuit breaker, protects electrical circuits from excessive current during short circuits or overloads. Traditional electromechanical circuit breakers use mechanical parts and operate on the millisecond scale. The Siemens SENTRON 3QD2 uses semiconductor components and protection algorithms to interrupt current in the microsecond range, up to 1,000 times faster than conventional systems. This response time supports direct current (DC) grids and power-critical sites such as industrial manufacturing facilities and AI data centers, where electrical failures can cause costly downtime, data loss, or expensive hardware damage.
“Our new direct current portfolio offers innovative solutions that not only improve energy efficiency but also enable the development of resilient, future-proof infrastructure,” said Markus Grabmeier, CEO electrical products at Siemens Smart Infrastructure. “Direct current applications can decrease energy consumption and substantially cut material usage. By integrating batteries, peak power can also be significantly reduced. With this approach, we are making a decisive contribution to the decarbonization of our industries, while reinforcing our commitment to developing technologies that deliver tangible value to our customers and society.”
The companies are integrating Infineon’s 62 mm CoolSiC MOSFET module 1200 V into Siemens’ protection concepts for DC grids and electrified environments. The work addresses applications that require fast switching, fault response, and reliable power distribution as industrial and infrastructure operators manage rising performance and reliability requirements.
A demo showcase of the Siemens SENTRON 3QD2 semiconductor circuit breaker will be exhibited at the Infineon booth (hall 7, booth 470) at PCIM Europe 2026 in Nuremberg from 9 to 11 June.
Source: Siemens
About Infineon Technologies
Infineon Technologies AG, established in 1999 as a spin-off from Siemens AG, is a German semiconductor manufacturer headquartered in Neubiberg, near Munich. The company specializes in designing, developing, and manufacturing a wide range of semiconductor products, including power semiconductors, microcontrollers, sensors, and application-specific integrated circuits (ASICs). These products serve various industries, such as automotive, industrial power control, power and sensor systems, and connected secure systems. Infineon’s solutions are integral to applications like automotive electronics, renewable energy systems, industrial drives, consumer electronics, and security systems. Infineon employed approximately 60,000 people worldwide. The company operates 69 R&D locations and 17 manufacturing sites globally.
About Siemens Smart Infrastructure
Siemens Smart Infrastructure, a division of Siemens AG, is headquartered in Zug, Switzerland. The division integrates energy systems, buildings and industrial processes to improve efficiency and support modern infrastructure needs. It provides HVAC controls, fire safety systems, security technologies, energy-performance services, grid-resilience tools and electric-vehicle charging equipment. Its offerings serve sectors such as data centers, energy and manufacturing. The division develops systems that span the energy value chain, from power generation to end use, and focuses on addressing challenges related to urbanization and climate change. It also places emphasis on cybersecurity to support secure and reliable operation in increasingly digital environments. Siemens Smart Infrastructure employed about 80,000 people.