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Square D Co.

QO® 42-space 300 A, 120 /240 VAC Indoor Circuit Breaker Panel -- 20 in.W x 68 in.H x 5 3/4 in.D -- Fixed Main

ebuild Ref. No. QON42MS300(Int)
Suggested Retail Price $3,911
Retail Price Information
List Price Notice

Where prices are shown, they are based on the best information available to ebuild and generally refer to manufacturer's suggested retail prices. They should be used for reference only. In some instances, the list price refers to the lowest-cost version of an item that may be available in a variety of colors, finishes, sizes -- or upgraded features. Check with local distributors for actual prices.

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Product Specifications

Manufacturer Model No. QON42MS300(Int)
Location Class Indoor
No. of Spaces 42
Max. Number of Single Pole Circuits 42
Max. Number of Tandem Circuit Breakers 0
No. of Phases 1
No. of Wires 3
Voltage Rating
  • 120 VAC
  • 240 VAC
Ampere Rating 300 A
Interrupting Rating 42000 A
Main Lug Design Fixed
Wire Size (Aluminum)
  • 4 AWG
  • 500 AWG
Wire Size (Copper)
  • 4 AWG
  • 500 AWG
Depth 5 3/4 in.
Height 68 in.
Width 20 in.
Notes Interior only, order box separately
Related Trim/Accessories
  • Equipment Ground Bar Kit (PK27GTAe)
Additional Parts Required/Recommended
  • Flush-mounted Indoor Cover with Door (MHC68VF)
  • Surface-mounted Indoor Cover with Door (MHC68VS)

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