Square D QO Replacement Cover,...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$72.04
Square D QO Replacement Cover, Flush, Gray for 42-Space Load Center with QDL Main Breaker

Square D QO Replacement Cover, Flush, Gray for 42-Space Load Center with QDL Main Breaker

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Model: QOC342MQF

In Stock (leaves warehouse same day if ordered before 3pm ET)

$72.04
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Square D QO Replacement Cover, Flush, Gray for 42-Space Load Center with QDL Main Breaker

The Square D QO Replacement Cover is engineered for 42-space QO load centers equipped with a QDL main breaker, giving electricians and facility owners a direct-fit way to restore a clean, finished panel front. Finished in baked enamel gray, this flush-mount cover is built to match the QO system's premium feature set, including QO breakers, ground fault interrupters, and surge arresters, so the enclosure stays fully protected and code-ready. As part of the QO range, it supports both single and three phase indoor load center configurations and is backed by Square D's compliance documentation, including ROHS Eur conformity with exemptions.

Key Features

  • Space Count: Sized specifically for 42-space QO load centers, ensuring accurate alignment with breaker positions and knockouts.
  • Main Breaker Compatibility: Designed for load centers fitted with a QDL main breaker configuration.
  • Mounting Style: Flush mounting delivers a recessed, low-profile finish for a clean panel appearance.
  • Finish: Baked enamel gray surface finish resists wear and provides a durable, corrosion-resistant surface.
  • QO System Compatibility: Works within the QO load center platform, which supports a full complement of QO breakers, ground fault interrupters, and surge arresters.
  • Indoor Application: Intended for use with indoor load center enclosures within the QO range.

Certifications & Compliance

  • ROHS Eur Compliant with Exemptions
  • Mercury Free
  • Prop 65: This product can expose you to chemicals including lead and lead compounds, known to the State of California to cause cancer and birth defects or other reproductive harm.

Technical Specifications

  • Warranty: 18 months
  • Warranty Period: 18 months
  • Number Of Spaces: 42
  • Range Of Product: QO
  • Mercury Free: Yes
  • Sustainable Packaging: No
  • Market Segmentation: Commercial
  • Green Premium Status For Reporting: Green Premium product

Typical Applications

  • Replacement Covers for 42-Space QO Load Centers
  • Residential and Commercial Electrical Panel Upgrades
  • Load Centers with QDL Main Breaker Configurations
  • Panelboard Cover Retrofits During Renovation
  • Indoor Load Center Maintenance and Repair

Why Square D?

Square D backs this QO replacement cover with an 18-month warranty and Mercury Free construction, reflecting the same engineering standards found across the QO load center platform. Built to fit 42-space load centers with a QDL main breaker, it helps keep panels code-compliant and properly enclosed. As part of a system with documented ROHS Eur exemption compliance, it supports professional electrical work where reliable, verified components matter.

Manufacturer Resources

Product Specs

Product Type:
Load Center Cover
Product Finish:
Baked Enamel
Configuration:
Flush Mount
Series:
QO
Product Color:
Gray
Department:
Electrical
Product Group:
Power Distribution
Product Subgroup:
Panelboards & Load Centers

Square D QOC342MQF – Frequently Asked Questions

1) Will the Square D QOC342MQF cover fit any 42-space QO load center?
It fits 42-space QO load centers built with a QDL main breaker configuration. The cutout and breaker alignment are matched to that specific main breaker arrangement, so a 42-space QO panel with a different main (or a main lug only interior) will not line up correctly. Check the main breaker type stamped on the existing interior before ordering QOC342MQF.
2) Is this a flush cover or a surface mount cover for a QO panel?
Flush mount. The QOC342MQF is built for a recessed enclosure where the panel is set into the wall and the cover trims out against the finished surface. If your 42-space QO enclosure is surface mounted on the wall, a flush trim is the wrong part and you need the surface version instead.
3) Can I use this QO cover on an outdoor panel?
No. This QO replacement cover is intended for indoor load center enclosures within the QO range. An outdoor or rainproof enclosure uses a different front with its own gasketing and latching, and putting an indoor flush trim on it defeats the enclosure rating.
4) My QO panel cover was damaged during a remodel. Can I just replace the cover instead of the whole panel?
Yes, that is exactly what this part is for. A 42-space QO load center with a QDL main can be re-fronted with the QOC342MQF, restoring a closed, finished panel without pulling the interior or rewiring anything. It is a common fix on renovation work and on panels in commercial buildings where the trim went missing or got bent.
5) Does this cover work with QO breakers, GFCI breakers, and surge arresters in the panel?
It does. The cover is part of the QO load center platform, which takes QO breakers, ground fault interrupters, and surge arresters, and the front is cut to align with the breaker positions and knockouts of a 42-space QO interior. Device mix inside the panel does not change the trim you need, but the main breaker type does: this one is for QDL mains.
6) What part number do I order for a Square D 42-space flush QO panel cover?
Order Square D QOC342MQF. That is the manufacturer part number for the flush, gray baked enamel front for a 42-space QO load center with a QDL main breaker. Distributors cross-referencing should note the QOC prefix identifies it as a QO cover, 342 the 42-space flush trim size.
7) What color and finish is the Square D QO 42-space replacement cover?
Gray, in a baked enamel finish. That is the standard QO panel front appearance, so it matches other QO covers already on a wall of panels in a mechanical room or multi-family electrical closet. The baked enamel holds up to handling and resists corrosion on an indoor panel front.
8) Does the QO cover come with a door, or is it just the trim?
The QOC342MQF is a load center cover for the QO platform, supplied as the panel front itself. It is the flush trim for a 42-space QO enclosure with a QDL main. Breakers, interiors, and the enclosure box are separate items and are not part of this order.
9) Is this QO cover suitable for commercial buildings or residential only?
Both. Square D markets this QO cover to the commercial segment, and it is used on residential and commercial electrical panel upgrades alike wherever a 42-space indoor QO load center with a QDL main is in service. Single phase and three phase indoor QO configurations are covered by the QO range.
How fast can I get the Square D QOC342MQF delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Square D QOC342MQF come with a warranty?
Absolutely. The Square D QOC342MQF is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Square D QOC342MQF?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Square D QOC342MQF from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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