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Square D QO 100 amps 120/240 V 24 space 24 circuits Wall Mount Main Breaker Load Center
Square D QO 100 amps 120/240 V 24 space 24 circuits Wall Mount Main Breaker Load Center
Square D QO 100 amps 120/240 V 24 space 24 circuits Wall Mount Main Breaker Load Center
Square D QO 100 amps 120/240 V 24 space 24 circuits Wall Mount Main Breaker Load Center

Square D QO 100 amps 120/240 V 24 space 24 circuits Wall Mount Main Breaker Load Center

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

A 100A main breaker and 24 spaces give you room to grow your circuits without swapping panels later.
Square D MPN QO124M100PC In Stock & Ready to Ship
$169.99
Free shipping on orders over $149
Ships within 24 hours · most orders arrive in about 2 business days
Ships free on orders over $149 $14.99 flat shipping until your order reaches $149.

About Product Overview

This Square D QO load center is built around a 100A main breaker, giving you a full 24 spaces to run circuits for a house, workshop, or outbuilding that needs real capacity. It's rated for 120/240V service, which covers standard residential and light commercial setups, and the single-pole circuit protection format works with the QO breaker line that electricians and homeowners already know.

Indoor, wall-mount installation keeps it straightforward for a panel replacement or new circuit distribution job. Note that individual breakers aren't included, so you'll need to add QO single-pole breakers to fill out the spaces to match your circuit count. Built in the USA and UL Listed, it's a solid choice for anyone planning ahead for additions like a workshop, finished basement, or extra appliance circuits down the road.

  • Main breaker rating: 100A
  • Maximum circuits / spaces: 24
  • Voltage: 120/240V
  • Circuit protection type: Single pole (breakers sold separately)
  • Mounting: Indoor wall mount
  • UL Listed; made in USA

The Details Specifications

Brand Square D
Model / MPN QO124M100PC
UPC 785901978480
Weight 21 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

Go ahead. Check.

You're going to price-check us against Amazon, Home Depot, and Lowe's. Everybody does. Good — open all three tabs. We'll wait. Then look hard at what you're actually being handed over there.

On Amazon, start with these four questions before you click buy.

01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Square D. A third-party marketplace seller usually isn't.

03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

Who you call when it breaks

Ours is a phone number with a person behind it who has held this product. M–F, 6 AM – 5 PM Pacific. (866) 469-8556

The big boxes don't care if your hardware store survives.

Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.

Why we tell you to shop local
Authorized dealer · Square D

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Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
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Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

Ask our counter. Or theirs.

Most hardware stores can do more than you think. If we can't help you, the folks down the street probably can — just ask at the counter.

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