In September 2025, Sun.King Technology Group Limited (0580.HK) announced that its Swiss subsidiary, Astrol Electronic AG (“Astrol”), has entered into a new collaboration with an award-winning innovator in the field of nuclear fusion. The customer will adopt Astrol’s industry-leading power switching solutions to control current in cutting-edge fusion systems.

For more than a decade, Astrol has been a trusted partner in the fusion industry, designing and manufacturing customized power electronics for various reactor concepts. As each fusion project explores different technological pathways toward commercial viability, Astrol’s capability to deliver tailored solutions has positioned it as a highly sought-after technology provider in the sector.

To date, Astrol has delivered pulse power switching products and solutions to more than 80 projects worldwide, including high-energy particle research facilities and pulse laboratories. Notable customers include Tri Alpha Energy (2017) and another major player in the controlled fusion field (2022).

Comprehensive Coverage of Fusion Technology Pathways

To address the diverse requirements of different fusion approaches for power switching technologies, Astrol has developed multiple product series based on various power semiconductor devices:

• Fast Thyristors – Ideal for cases      where the current pulse edge is less demanding, enhancing overall system      durability.
• Insulated Gate Bipolar Transistors (IGBTs) – Outstanding performance in applications requiring extremely      steep turn-off edges, enabling precise and rapid interruption of large      currents.
• Integrated Gate-Commutated Thyristors (IGCTs) – Proven solutions for short-pulse applications with current      rise rates reaching tens of kiloamps per microsecond. Astrol’s IGCT      assemblies combine world-leading GCT technology with the company’s unique      design innovations, ensuring unmatched reliability even under extreme      operating conditions.

End-to-End Technical Partnership: From Concept to Implementation

With more than 25 years of expertise in customized R&D for pulse power systems, Astrol is committed to building close collaborative relationships with customers. During the design phase, Astrol’s expert team works hand-in-hand with clients to translate technical requirements—such as current, voltage, and pulse shape—into optimized system architectures. Leveraging advanced electrical and mechanical design capabilities, along with a mature and modular component library, Astrol’s solutions deliver superior performance and reliability while also improving cost-effectiveness and extending service life.

By entrusting their most complex pulse power switching challenges to Astrol, fusion innovators can focus their R&D resources on the fusion process itself. This accelerates progress in the global race toward practical and sustainable fusion energy. Partnering with Astrol provides critical support for innovators, helping bring the vision of clean, limitless energy closer to reality.

For more information, please visit www.sunking-tech.com or Astrol.com.