Square D QO-154L225PG Converti...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$268.16
Square D QO-154L225PG Convertible Main Lug Load Center, NEMA 1

Square D QO-154L225PG Convertible Main Lug Load Center, NEMA 1

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Model: QO124L125PGRB

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

$268.16
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Square D QO-154L225PG Convertible Main Lug Load Center, NEMA 1

The Square D QO-154L225PG Convertible Main Lug Load Center is engineered for residential and light industrial electrical distribution, accepting QO circuit breakers, ground fault interrupters, arc fault interrupters, and surge arresters inside a durable NEMA 1 indoor enclosure. This 1 phase, 3 wire convertible main lugs (PoN) configuration is available across a range of amperage ratings from 125A to 225A to match project load requirements, and every configuration shares a tin-plated copper busbar and a 65 kA short circuit current rating, delivering the performance and durability professionals expect from Square D. UL Listed for code-compliant installation, this load center is a dependable choice for service panel upgrades and new construction alike.

Key Features

  • Amperage Range: Available in 125A, 200A, and 225A main lug ratings to fit a variety of service sizes.
  • Convertible Main Lugs (PoN): Single-phase main lug only indoor load center that accepts QO breakers, GFCI, AFCI, and surge arrester devices for flexible system protection.
  • Durable Construction: Tin-plated copper busbar provides superior conductivity and corrosion resistance for long-term reliability.
  • Electrical Connection: Lug-style termination accepts AWG 6...300 kcmil aluminum/copper conductors, with main lugs torqued to 250 lb.in for AWG 4...250 kcmil aluminum/copper wire, and cover fasteners torqued to 20 lb.in.
  • Short Circuit Rating: 65 kA short circuit current rating supports demanding fault-protection requirements.
  • Phase Configuration: 1 phase, 3 wire system for standard residential and light commercial service.
  • NEMA 1 Enclosure: Indoor-rated enclosure with baked enamel gray finish for a clean, protected installation.
  • Operating Range: Rated for ambient air temperatures from -5°C to 40°C.

Certifications & Compliance

  • UL Listed
  • NEMA 1 Indoor Enclosure

Technical Specifications

  • Amperage Options: 125A, 200A, 225A
  • Warranty Period: 18 months
  • Toxic Heavy Metal Free: Yes
  • Mercury Free: Yes
  • Range Of Product: QO
  • ROHS Exemption Information: Yes
  • ROHS Eur In Scope: Yes
  • Number Of Tandem Circuit Breakers: 10

Typical Applications

  • Residential Electrical Service Panels
  • Light Industrial Power Distribution
  • Main Service Upgrades and Panel Replacements
  • New Construction Electrical Installations
  • Indoor Load Center Applications Requiring NEMA 1 Protection

Why Square D?

Square D QO Load Centers combine a tin-plated copper busbar, a 65 kA short circuit current rating, and UL Listed construction to deliver superior performance and durability across the full 125A-225A amperage lineup. With convertible main lugs, a NEMA 1 indoor enclosure, and compatibility with QO breakers, GFCI, AFCI, and surge arrester devices, this load center supports reliable, code-compliant electrical distribution for professional installations.

Manufacturer Resources

Product Specs

Product Type:
Load Center
Product Finish:
Baked Enamel Gray
Listing:
UL Listed
Connection Type:
Lugs
Configuration:
Main Lug (PoN)
Product Material:
Tin-Plated Copper
Department:
Electrical
Product Group:
Power Distribution
Amperage Rating:
125A - 225A
Standards:
NEMA 1
Product Subgroup:
Panelboards & Load Centers

Square D QO124L125PGRB – Frequently Asked Questions

1) Does this Square D QO load center include a main breaker, or is it main lug only?
Main lug only. The configuration is convertible main lugs (PoN), so the incoming service conductors land directly on lugs with no factory main breaker. That means the overcurrent protection has to come from upstream, typically a service disconnect or a meter main, unless you convert it with a main breaker kit. If you need the disconnect in the panel itself, order a main breaker load center instead.
2) What size service conductors will the main lugs on this Square D QO panel accept?
The lug terminations take AWG 6 through 300 kcmil aluminum or copper conductors. Torque the main lugs to 250 lb-in for AWG 4 through 250 kcmil aluminum/copper wire, and the cover fasteners to 20 lb-in. That range covers typical 125A through 225A residential and light commercial feeders.
3) Which amperage ratings of the Square D QO main lug load center are available, and what are the part numbers?
Three ratings: 125A as QO124L125PGRB, 200A as QO130L200PGRB, and 225A as QO154L225PG. All three share the tin-plated copper busbar, the 65 kA short circuit current rating, and the NEMA 1 indoor enclosure, so the amperage is the decision point.
4) What breakers fit a Square D QO load center, and can I use tandems?
It takes QO circuit breakers, including GFCI, AFCI, and surge arrester devices in the QO family. Up to 10 tandem QO breakers can be used, which is how you add circuits without a larger enclosure. QO breakers are not interchangeable with Eaton BR or CH breakers, so a panel swap means new breakers.
5) I need a 125A main lug panel for a rental property. What are my options across brands?
At 125A main lug you can use the Square D QO124L125PGRB, with a tin-plated copper bus, 65 kA SCCR, and a NEMA 1 indoor enclosure. Two other 125A main lug panels we carry: the Eaton BR BRP24L125GW, aluminum bus, NEMA 1 indoor, and the Eaton CH CH2L, copper bus, NEMA 3R so it can be used outdoors. If a property already standardizes on one breaker family, stay with it, since the breakers do not cross over.
6) What should I use instead of the Square D QO main lug load center if the panel is mounted outdoors?
The Square D QO main lug load center is a NEMA 1 indoor enclosure with a baked enamel gray finish, so it is not intended for an exposed exterior location. For an outdoor-rated main lug panel, the Eaton CH 125A Main Lug Loadcenter comes in a NEMA 3R enclosure with a copper bus, and the ABB PAM ReliaHome load center uses a NEMA 3R aluminum enclosure. Both are rated for the rain-exposed location the QO NEMA 1 unit is not.
7) What is the closest equivalent to the Square D QO main lug load center from another manufacturer?
The Eaton CH 125A Main Lug Loadcenter is the nearest match on construction: like the Square D QO main lug load center it uses a copper bus, where the Square D QO uses a tin-plated copper busbar. The difference is the enclosure. The Square D QO main lug load center is NEMA 1 for indoor mounting, while the Eaton CH unit is NEMA 3R. If the panel is going on an exterior wall, the CH enclosure suits that location; for an indoor service panel the NEMA 1 QO is the direct fit. Note also that the Eaton CH loadcenter accepts CH breakers, not QO breakers.
8) Is there a lighter-duty alternative to a tin-plated copper bus load center for a residential panel?
Yes. The Eaton BRP24L125GW is a 125A main lug only loadcenter with an aluminum bus in a NEMA 1 enclosure. It matches the Square D QO main lug load center on configuration and indoor enclosure type at the 125A end of the QO range, which spans 125A to 225A, but the bus material differs: aluminum on the Eaton BR versus tin-plated copper on the Square D QO. Bus material affects conductivity and corrosion resistance, so where a spec calls out copper bus the BR will not satisfy it. The BR also takes BR-series breakers rather than QO.
9) Will a 65 kA SCCR panel satisfy an available fault current calculation on a light industrial feeder?
The QO main lug load center carries a 65 kA short circuit current rating, which covers service points well above typical residential available fault current and is what lets it be used for light industrial distribution as well as residential service panels. Compare that number against the available fault current from your utility or transformer calculation at the panel location.
10) Is this a 1-phase or 3-phase load center, and can I get 120/240V split phase from it?
It is a 1 phase, 3 wire panel, which is standard 120/240V split-phase residential and light commercial service. For a 3-phase service you need a different panelboard entirely.
11) Is the ABB ReliaHome plug-on neutral load center a substitute for a Square D QO convertible main lug panel?
They are not interchangeable even though both are plug-on neutral style panels. The ABB PAM ReliaHome load center is built in a NEMA 3R aluminum enclosure, while the Square D QO main lug load center is a NEMA 1 indoor unit with a tin-plated copper busbar and a lug termination accepting AWG 6 to 300 kcmil aluminum or copper conductors. More importantly, the QO interior accepts QO breakers, GFCI, AFCI, and surge arrester devices; ABB ReliaHome panels take ABB breakers. Swapping the enclosure means re-buying the breaker population, so these are chosen as a system, not substituted one for one.
12) What ambient temperature range is this load center rated for? Can it go in an unheated garage or attic?
Rated for ambient air from -5 C to 40 C (23 F to 104 F). An unheated garage in a cold climate or a summer attic can run past both ends of that band, so check the actual conditions at the mounting location before committing.
How fast can I get the Square D QO124L125PGRB 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 QO124L125PGRB come with a warranty?
Absolutely. The Square D QO124L125PGRB 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 QO124L125PGRB?
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
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