Square D QOMB3 Load Center OEM...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$122.26
Square D QOMB3 Load Center OEM Mounting Base, 70A, 1 Phase, 3 Spaces

Square D QOMB3 Load Center OEM Mounting Base, 70A, 1 Phase, 3 Spaces

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Model: QOMB3

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

$122.26
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Square D QOMB3 Load Center OEM Mounting Base, 70A, 1 Phase, 3 Spaces

The Square D QOMB3 is a QO OEM plug-on mounting base designed for mounting QO, QO GFI, and QO EPD circuit breakers. This single phase, 2 wire mounting base accommodates breakers up to 70A at 240VAC max and provides 3 spaces, with a 10kA rating and a plug-on neutral design for a shorter footprint and faster installs.

Key Features

  • Amperage Rating: 70A capacity for single phase, 2 wire circuits.
  • Voltage Rating: 240VAC max for residential and light commercial load centers.
  • Interrupt Rating: 10kA short circuit rating for reliable circuit protection.
  • Configuration: 3 spaces for QO, QO GFI, and QO EPD plug-on circuit breakers.
  • Plug-On Neutral Design: Shorter footprint for faster installation.
  • Wire Compatibility: AWG 12...AWG 2 aluminium and AWG 14...AWG 4 copper.
  • Simple Design: Clear instructions for quick setup.

Certifications & Compliance

  • RoHS EUR Compliant with Exemptions
  • Mercury Free
  • Country of Origin: United States

Technical Specifications

  • Warranty: 18 months
  • Warranty Period: 18 months
  • Returnability: Yes
  • Mercury Free: Yes
  • ROHS Eur In Scope: Yes
  • ROHS Exemption Information: Yes

Typical Applications

  • Residential Load Center Panels
  • Light Commercial Electrical Panels
  • QO Circuit Breaker Installations
  • Panelboard Retrofits and OEM Replacements
  • New Construction and Renovation Wiring

Why Square D?

Square D backs the QOMB3 mounting base with an 18-month warranty and RoHS-compliant, mercury-free construction manufactured in the United States. Its plug-on neutral design and simple setup make it a dependable choice for professional electricians seeking code-compliant, reliable circuit protection in QO load center installations.

Manufacturer Resources

Product Specs

Warranty:
18 months
Take Back:
No
Warranty Period:
18 months
Returnability:
Yes
H And D Subrange:
COM
Sustainable Packaging:
No
Mercury Free:
Yes
ROHS Eur Full Compliance Status Id:
COMPLIANT_WITH_EXEMPTIONS
Packaging Without Single Use Plastic:
No
Wd Status:
5 - INITIALIZED WITH DataSCAN OK (Migration)
ROHS Eur In Scope:
Yes
Local Data Status:
Publishable
B2b Bullet Point 2:
Reliable and durable
Country Of Origin:
United States
H And D Enrichment Class 3:
Load centers (equipped)
H And D Enrichment Function:
ENCLOSURES
Recycled Metal Content At Cr Level:
0 %
Legacy Weee Scope:
In
Package Weight Lbs:
113.398 g
Packaging Made With Recycled Cardboard:
No
Environmental Disclosure:
ENVPEP2212001
H And D Enrichment Assignment:
no
Rohs Eur Conformity Date:
2436
Eoli Availability Display:
No need of specific recycling operations
With Recycled Cardboard:
No
WEEE Product Category:
5
Without Single Use Plastic:
No
B2b Bullet Point 5:
Time-saving diagnostics with touch of a button
Product Availability:
Stock - Normally stocked in distribution facility
B2b Bullet Point 4:
Simple design and clear instructions for quick setup
ROHS Eur Status:
Compliant with Exemptions
Rohs Exemption Information:
Yes
Local Publishable Date:
2024-12-20
B2b Bullet Point 1:
Provides superior circuit protection
ROHS Eur Full Compliance Status:
Compliant with Exemptions
H And D Domain:
Safety
H And D Enrichment Class 4:
Load center OEM interiors
Eu Rohs Directive:
Compliant with Exemptions
Scope Perimeter:
Outside of Europe
Return Indicator:
Y
Reach Full Compliance Status Id:
CONTAINS_SVHC
Product Contributes To Saved And Avoided Emissions:
No
Product Type:
Panelboard Accessory
Department:
Electrical
Product Group:
Power Distribution
Product Subgroup:
Panelboards & Load Centers

Square D QOMB3 – Frequently Asked Questions

1) What breakers will plug onto the Square D QOMB3 mounting base?
The QOMB3 takes QO, QO GFI, and QO EPD plug-on circuit breakers, up to 70A at 240VAC max. It is a QO-specific interior, so Homeline or other-brand breakers will not seat on it.
2) How many circuit spaces does the QOMB3 give me?
Three spaces, single phase, 2 wire. If you need more than three plug-on positions you need a larger QO interior, not this base.
3) What wire sizes can I land on the QOMB3 base?
Aluminum from AWG 12 to AWG 2, copper from AWG 14 to AWG 4. Anything heavier than those terminations needs a different interior.
4) Is the QOMB3 rated for a 10kA short circuit current?
Yes, the QO mounting base carries a 10kA short circuit rating at 240VAC max. If your available fault current at that point in the system exceeds 10kA, this base is not the right interior.
5) What is a plug-on neutral base and why does it matter on a small panel?
On the QOMB3 the neutral is built into the base so plug-on neutral breakers (QO GFI and EPD types) seat directly without a pigtail run to a separate neutral bar. That shortens the footprint and cuts wiring time on a three-space interior where there is little room to dress conductors.
6) Can I use the QOMB3 as a replacement interior in an existing QO panel?
It is sold as a QO OEM plug-on mounting base, and panelboard retrofits and OEM replacements are listed among its applications along with new construction and renovation wiring. Match the existing enclosure to a 3-space, 70A, single phase 2 wire interior before ordering.
7) Does the QOMB3 come with a ground bar?
No ground bar is part of the QOMB3 mounting base. Ground bar kits are a separate item by brand and panel family, for example the Eaton GBK Series ground bar kit fits CH loadcenters, not QO. For a QO interior you need a QO-compatible ground bar kit.
8) Can an Eaton GBK ground bar kit be used in place of the Square D QOMB3 mounting base?
No. The Square D QOMB3 is a QO OEM plug-on mounting base that breakers land on - it accepts QO, QO GFI, and QO EPD plug-on breakers in 3 spaces, rated 70A at 240VAC max with a 10kA short circuit rating. The Eaton GBK series is a ground bar kit for CH loadcenters, which adds a bonded termination bar for equipment grounding conductors rather than providing breaker mounting. If the need is a breaker base for a QO panel, the QOMB3 is the part; a ground bar kit is an accessory that does not mount breakers and is intended for Eaton CH panels, not QO.
9) I need to add grounding terminations to a panel, not breaker spaces - is the QOMB3 the right part?
No. The QOMB3 provides 3 breaker spaces for QO, QO GFI, and QO EPD plug-on breakers with a plug-on neutral design, so it is the interior a QO breaker clips onto. For adding equipment grounding conductor terminations, the Eaton GBK series ground bar kit is the part type that does that job, intended for CH loadcenters. Order the QOMB3 when the requirement is breaker mounting capacity in a QO installation.
10) Where is the Square D QOMB3 made, and is it RoHS compliant?
Made in the United States. It is RoHS (EU) compliant with exemptions and mercury free. For buyers tracking REACH, the record flags it as containing an SVHC, and the environmental product declaration reference is ENVPEP2212001.
11) Is the QOMB3 suitable for light commercial work or residential only?
Both. The 240VAC max rating covers residential load center panels and light commercial electrical panels, which is where a 70A single phase 2 wire interior normally lands.
How fast can I get the Square D QOMB3 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 QOMB3 come with a warranty?
Absolutely. The Square D QOMB3 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 QOMB3?
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 QOMB3 from ZenSupply?
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