- 1924 Michel le Goullec acquires Manufacture d’Appareillage Electrique in Nanterre, France. In 1928 the company becomes Télémécanique Electrique.
- 1931 The company initiates a pioneering social policy that offers many employee benefits, long before they were mandated by law.
- 1954 Telemecanique enters an agreement with Merlin Gerin to rationalize production.
- 1960s The company opens subsidiaries in Italy, the Netherlands, Sweden, Portugal, the UK, Norway, Switzerland, Canada, Spain, Denmark and the US.
- 1970s Telemecanique opens subsidiaries in Africa, South America and Asia. It develops popular mini computers for industrial control.
- 1980s The company develops new, important technology, most notably the Altivar frequency inverters and TSX programmable logic controllers.
- 1988 Schneider Electric acquires Telemecanique. The brand continues its development and technological innovation.
- 2001 Telemecaniques's QuickFit technology is developed enabling connections without tools or cables.
- 2009 Telemecanique products, services, and solutions migrate to the Schneider Electric brand as its Automation and Control offer.