Square D Circuit Breakers

Square D Circuit Breakers

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20 Item(s)

per page

  • Square D SQD Q422250

    Square D SQD Q422250 2-P, 250A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422250AB

    Square D SQD Q422250AB 2-P, 250A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422250AC

    Square D SQD Q422250AC 2-P, 250A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422250BC

    Square D SQD Q422250BC 2-P, 250A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422300

    Square D SQD Q422300 2-P, 300A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422300AB

    Square D SQD Q422300AB 2-P, 300A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422300AC

    Square D SQD Q422300AC 2-P, 300A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422300BC

    Square D SQD Q422300BC 2-P, 300A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422350

    Square D SQD Q422350 2-P, 350A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422350AB

    Square D SQD Q422350AB 2-P, 350A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422350AC

    Square D SQD Q422350AC 2-P, 350A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422350BC

    Square D SQD Q422350BC 2-P, 350A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422400

    Square D SQD Q422400 2-P, 400A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422400AB

    Square D SQD Q422400AB 2-P, 400A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422400AC

    Square D SQD Q422400AC 2-P, 400A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q422400BC

    Square D SQD Q422400BC 2-P, 400A, 240V, type Q4 Circuit Breaker

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    $664.10
  • Square D SQD Q432250

    Square D SQD Q432250 3-P, 250A, 240V, type Q4 Circuit Breaker

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    $833.75
  • Square D SQD Q432300

    Square D SQD Q432300 3-P, 300A, 240V, type Q4 Circuit Breaker

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    $833.75
  • Square D SQD Q432350

    Square D SQD Q432350 3-P, 350A, 240V, type Q4 Circuit Breaker

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    $833.75
  • Square D SQD Q432400

    Square D SQD Q432400 3-P, 400A, 240V, type Q4 Circuit Breaker

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    $833.75

20 Item(s)

per page

Square D circuit breakers are available in countless different configurations, reconditioned and new. We list hundreds of models in our online catalog, including popular models like the XO120, EDB34030, KA36200, QOB230, and FA34100, as well as various other models, new, used, and professionally reconditioned. If you're having a difficult time finding the exact part you need, or you're looking for an obsolete/discontinued model that we don't list on our site, CALL US and we'll help you get the Square D breaker you need, quickly. Keep in mind that we offer same day shipping and overnight shipping options.

Square D is an American manufacturer of equipment used to control and distribute electric power 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. In 1991, the company was acquired and became a subsidiary of Schneider Electric. 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 Square D product.