Square D

Detroit Fuse and Manufacturing began selling fuses and fuse switches in 1902. The company changed its name to Square D to capitalize on the high recognition of its trademark, a capital D in a yellow square.

The brand is a reference for electrical distribution and industrial control in the United States and many other countries around the world. Square D products and systems are the pride of North American industry in all areas, from high to low voltage, and range from circuit breakers to supervisory systems.

Square D products are widely used in commercial and residential buildings.

Offering more performance and more component options than the competition, Square D motor control centers include a feature-rich modular design engineered to deliver rugged, dependable service for years to come.