celduc® group specializes in electrical engineering and electronics. With many years of experience, celduc® is fully focused on serving its market and customers all over the world. The company was founded in 1964 by Michel Guichard. Today it is split into two separate companies, celduc® transfo & celduc® relais, to channel and focus its expertise into two distinct market sectors. Set up near Saint-Etienne, the celduc® group has played a great part in rising in prosperity of the Rhône-Alpes area and is the only French company producing and selling solid state relays.