Products and systems developed by the Square D brand are present in all sectors of activity, from circuit breakers to monitoring and control systems. The tertiary and residential building sectors are major consumers of its products.
Milestone Dates
1902
Detroit Fuse and Manufacturing, a US supplier of electrical distribution and industrial control equipment, begins operations.
1917
The company changes its name to Square D, based on its trademark "D" appearing on conduit boxes and switches.
1926
Square D builds its first power distribution panelboard. Three years later it moves into the industrial controls market.
1935
The company launches its own range of circuit breakers and the first circuit breaker for residential use.
1940s
Square D has 10 factories in North America, 43 regional offices and a workforce of 7000, manufacturing half of all the circuit breakers used in aviation.
1950s
The company opens its first European subsidiary and introduces its iconic QO circuit breakers.
1970s
Square D opens agencies in South Africa and Asia. It introduces the Symax PLC and Watchdog energy management system.
1980s
After many years of growth and expansion, Square D focuses on electronics, through strategic acquisitions.
1991
Square D has 18,500 employees and operations in 23 countries when it joins Schneider Electric.