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    QO™ Load Centers

    Square D™ QO Load Centers

    Industry leading offer since 1955 with features engineered for faster installation, reliability and quality. Contractors installing QO know it’s the World’s Finest!

    Schneider Eletric Square D Picture
    QO™ Load Centers
    • Features

      The QO load center and circuit breaker family is designed to satisfy individual requirements with a comprehensive selection:

      • Single and three phase
      • 3/4" circuit breaker width
      • 30 to 400 amps 2 to 42 circuits
      • Indoor and outdoor versions
      • Separate flush or surface mount covers
      • Full complement of accessories


      • Backed Out Neutral Screws save labor and installation time.
      • Exclusive shielded copper bus features electro tin-plated copper bus bars sandwiched between two rugged polymer shields to insulate and secure the interior.
      • Straight-in mains wiring and uniform termination lugs help minimize service cable bends, cutting waste and saving installation time.
      • Convertible mains allow fast field conversion between main breaker and main lugs to meet changing job requirements.
      • Standard 22,000/10,000 ampere series short circuit current rating on main breaker load centers provides increased application capability.
      • QO three-phase main circuit breaker panels can be field upgraded to provide 100,000A short circuit current ratings.
      • Single, captive interior mounting screw can't be lost. Interior mounts quickly and can easily be removed during rough-in for paint or theft protection.
      • Split branch neutral with up to 50% more terminations than UL requirement -- simplifies wiring and reduces clutter.
      • Indoor enclosures designed to rotate 180 degrees to accommodate top or bottom service entrance feed, saving expensive service cable.
      • Combination slot/square-drive neutral, ground, and cover screw accommodate both standard flat blade screwdrivers and square-head drivers. Three ground bar mounting locations (left, right, and end) make it easier to wire.


      • Residential
      • Remodels/Upgrades
      • Commercial
      • Industrial
      • Agricultural