Stontronics is a UK-based designer and manufacturer of power conversion products, founded in 1990 and headquartered in Tonbridge, Kent. The company specializes in AC-DC power supplies, DC-DC converters, and custom transformers for a wide range of electronic applications. It offers an extensive portfolio including external power adapters (ST series), encapsulated PCB mount power modules, open-frame power supplies, battery chargers, and LED drivers. Stontronics became the power division of Stadium Group in 2006, gaining access to global manufacturing facilities in Asia and Europe. In 2018, TT Electronics plc acquired Stadium Group, integrating Stontronics into a broader engineered electronics portfolio. The company is recognized for its high-quality, medically and industrially compliant power solutions with worldwide safety agency approvals. Stontronics provides both standard and full custom power designs, supporting OEMs with rapid prototyping and engineering assistance. Its products are widely used in industrial automation, medical devices, test and measurement, and IoT equipment. Although not a semiconductor manufacturer, Stontronics holds a solid position in the European power supply market, competing with brands like XP Power and Mean Well. The brand emphasizes reliability, long product lifecycles, and localized technical support for its customers.