Since 1937, JEMA SA has led the way in the development of high power electronics systems. Founded in Brussels (Belgium), the JEMA SA company first specialized in the production of coil-based products such as transformers and resistors. JEMA SA then very quickly turned to specific coil-based products fully adapted for the particular needs of its clients.

With time and the evolution of electrical components, JEMA SA evolved towards the production of electric cables with complex topologies based on its coil-based products. From then on, production has been directed towards rectifiers, inverters and even battery chargers. Finally, thanks to its growing mastery of electromagnetism and associated technology, JEMA SA has specialized in power electronics intended principally for direct current applications.

The end of the 70s marked an important turning point in the company's history when JEMA SA studied, developed and supplied the various power supplies required by the particle accelerator in the Centre de Recherche du Cyclotron at the Université Catholique de Louvain-la-Neuve (CRC-UCL). From that moment on, JEMA SA has definitively specialized in the development of high performance power supplies.