Siemens SENTRON 3QD2 Circuit Breaker Gains Silicon Carbide Technology from Infineon for Faster Power Protection

SENTRON 3QD2 semiconductor circuit breaker

(IN BRIEF) Siemens and Infineon Technologies are collaborating to advance semiconductor circuit breaker technology for data centers, industrial production facilities and battery storage systems. Under the partnership, Infineon will supply silicon carbide power modules for Siemens’ SENTRON 3QD2 semiconductor circuit breakers, helping improve efficiency, power density and reliability in power-critical environments. Semiconductor circuit breakers use electronic components and smart protection algorithms to interrupt current during faults such as short circuits or overloads, operating in the microsecond range and up to 1,000 times faster than conventional electromechanical circuit breakers. This fast response is especially important for direct current grids, AI data centers, factories and battery systems, where electrical failures can cause downtime, data loss or hardware damage. By integrating Infineon’s 62 mm CoolSiC™ MOSFET module 1200 V into Siemens’ protection concepts, the companies aim to support more resilient, efficient and future-ready power infrastructure while helping industrial and infrastructure operators adopt direct current systems, reduce energy consumption and advance decarbonization. A demo of the SENTRON 3QD2 will be exhibited at Infineon’s booth during PCIM Europe 2026 in Nuremberg.

(PRESS RELEASE) ZUG, 9-Jun-2026 — /EuropaWire/ — Infineon Technologies AG and Siemens AG are collaborating to strengthen electrical protection in power-critical environments such as data centers, industrial production facilities and battery storage systems. As part of the partnership, Infineon will supply silicon carbide power modules for Siemens’ SENTRON 3QD2 semiconductor circuit breakers, supporting higher efficiency, greater power density and improved reliability.

The collaboration brings together Infineon’s expertise in silicon carbide semiconductor technology and Siemens’ capabilities in power distribution and infrastructure protection. The companies aim to address the growing need for fast, reliable and energy-efficient electrical protection as data centers, factories and industrial infrastructure become increasingly electrified and complex.

Semiconductor circuit breakers, also known as solid-state circuit breakers, are electronic protection devices that interrupt current flow in the event of faults such as short circuits or overloads. Unlike traditional electromechanical circuit breakers, which use mechanical components and typically operate on a millisecond timescale, Siemens’ SENTRON 3QD2 uses semiconductor components and intelligent protection algorithms to interrupt current in the microsecond range. This makes the system up to 1,000 times faster than conventional circuit breaker technologies.

The ultra-fast response is particularly important for direct current grids and other high-performance electrical systems, where even a brief delay during a fault can lead to costly downtime, data loss or damage to expensive hardware. In applications such as AI data centers, industrial manufacturing sites and battery storage facilities, faster protection can support greater system availability and operational continuity.

“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 and 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.”

Infineon’s 62 mm CoolSiC™ MOSFET module 1200 V will be integrated into Siemens’ advanced protection concepts. The use of silicon carbide technology is intended to enhance the efficiency and performance of the SENTRON 3QD2 semiconductor circuit breaker while supporting the development of more resilient and future-ready power infrastructure.

Siemens said its direct current portfolio is designed to improve energy efficiency and enable the development of more robust infrastructure for industrial and infrastructure applications. Direct current systems can help reduce energy consumption and material use, while the integration of batteries can significantly reduce peak power requirements.

“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 partnership supports the increasing adoption of direct current grids and highly electrified infrastructure. These systems require protection technologies that combine speed, precision and reliability to maintain safe operation and avoid failures in mission-critical environments.

By combining Infineon’s silicon carbide modules with Siemens’ semiconductor circuit breaker platform, the two companies aim to support operators of data centers, factories and battery storage systems as they modernize power distribution infrastructure and work toward higher efficiency, resilience and decarbonization.

A demonstration of the Siemens SENTRON 3QD2 semiconductor circuit breaker will be shown at Infineon’s booth at PCIM Europe 2026 in Nuremberg, Germany, from June 9 to 11. Infineon will present its decarbonization and digitalization solutions in Hall 7, Booth 470.

Infineon at PCIM Europe 2026 
PCIM Europe will take place in Nuremberg, Germany, from 9 to 11 June 2026. Infineon will present its products and solutions for decarbonization and digitalization in hall 7, booth 470. For press inquiries, please contact media.relations@infineon.com. Industry analysts interested in a briefing can email MarketResearch.Relations@infineon.com. Information about Infineon’s PCIM 2026 show highlights is available at www.infineon.com/pcim.

Siemens Smart Infrastructure (SI) is shaping the market for intelligent, adaptive infrastructure for today and the future. It addresses the pressing challenges of urbanization and climate change by connecting energy systems, buildings, and industries. SI provides customers with a comprehensive end-to-end portfolio from a single source – with products, systems, solutions, and services from the point of power generation all the way to consumption. With an increasingly digitalized ecosystem, it helps customers thrive and communities progress while contributing toward protecting the planet. To protect this journey, we foster holistic cybersecurity to ensure secure and reliable operations. Siemens Smart Infrastructure has its global headquarters in Zug, Switzerland. As of September 30, 2025, the business had around 79,400 employees worldwide.

Siemens AG (Berlin and Munich) is a leading technology company focused on industry, infrastructure, mobility, and healthcare. The company’s purpose is to create technology to transform the everyday, for everyone. By combining the real and the digital worlds, Siemens empowers customers to accelerate their digital and sustainability transformations, making factories more efficient, cities more livable, and transportation more sustainable. A leader in industrial AI, Siemens leverages its deep domain know-how to apply AI – including generative AI – to real-world applications, making AI accessible and impactful for customers across diverse industries. Siemens also owns a majority stake in the publicly listed company Siemens Healthineers, a leading global medical technology provider pioneering breakthroughs in healthcare. For everyone. Everywhere. Sustainably. In fiscal 2025, which ended on September 30, 2025, the Siemens Group generated revenue of €78.9 billion and net income of €10.4 billion. As of September 30, 2025, the company employed around 318,000 people worldwide on the basis of continuing operations. Further information is available on the Internet at www.siemens.com.

About Infineon
Infineon Technologies AG is a global semiconductor leader in power systems and IoT. Infineon drives decarbonization and digitalization with its products and solutions. The Company had around 57,000 employees worldwide (end of September 2025) and generated revenue of about €14.7 billion in the 2025 fiscal year (ending 30 September). Infineon is listed on the Frankfurt Stock Exchange (ticker symbol: IFX) and in the USA on the OTCQX International over-the-counter market (ticker symbol: IFNNY).

Media Contacts:

Christian Wilson
Siemens Smart Infrastructure
+49 172 1385608
christian_stuart.wilson@siemens.com 

Veronika Seifried
Infineon Technologies AG
+49 89 23461662
veronika.seifried@infineon.com

SOURCE: Siemens