Square D Electrical Supplies Switchgear, Contactors and Motor Starters. One of the largest electrical manufacturers.

ESU carries a large and diverse inventory of Square D products, including  Circuit Breakers, Transformers, Meter Sections, Disconnects, Panel Board Switches, Switchgear, Contactors and Motor Starters. Contact one of our representatives today at 858.558.2850 to find out more!

Square D is an American manufacturer of equipment used to control and distribute electric power. They are headquartered in Palatine, Illinois.

Square D was founded in 1903 in Detroit, Michigan by Bryson Dexter Horton who is credited with the invention of the safety switch which encased high voltage switches and started the company's main line of business of circuit breakers and encased control panels.

We carry a large and diverse inventory of Square D products, including  Circuit Breakers, Transformers, Meter Sections, Disconnects, Panel Board Switches, Switchgear, Contactors and Motor Starters. Contact one of our representatives today at 858.558.2850 to find out more!