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Square D QO 200 amps 120/240 V 42 space 42 circuits Combination Mount Main Breaker Load Center
Square D QO 200 amps 120/240 V 42 space 42 circuits Combination Mount Main Breaker Load Center
Square D QO 200 amps 120/240 V 42 space 42 circuits Combination Mount Main Breaker Load Center
Square D QO 200 amps 120/240 V 42 space 42 circuits Combination Mount Main Breaker Load Center

Square D QO 200 amps 120/240 V 42 space 42 circuits Combination Mount Main Breaker Load Center

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

42 circuit spaces on a 200A main breaker mean plenty of room to grow your home's electrical system without a second panel.
Square D MPN QO142M200PC In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $350.99. Our online price is $389.99.
$389.99
Free shipping on orders over $249
Ships within 24 hours · most orders arrive in about 2 business days
Ships free on orders over $249 $24.99 flat shipping until your order reaches $249.

About Product Overview

A 200A main breaker load center with 42 spaces gives a home real room to grow - enough capacity for a full kitchen, HVAC, a garage or workshop circuit, and whatever gets added down the line without a second panel. This Square D QO unit is built for standard 120/240V residential service and mounts as a combination unit, making it a solid choice for new construction, panel replacements, or service upgrades where more circuits are the goal. It's UL Listed and rated for indoor installation, and it's manufactured in the USA. Keep in mind breakers are sold separately, so plan for QO single-pole breakers to fill out the spaces you need.

  • 200A main breaker rating
  • 42 circuit spaces, single pole
  • 120/240V service
  • Combination mount, indoor rated
  • UL Listed
  • Breakers not included; QO breaker line required

The Details Specifications

Brand Square D
UPC 785901986898
Case Pack Quantity 1 per case
Retail Unit Quantity 1
Dimensions (L × W × H) 41 × 16 × 6
Weight 35 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

Go ahead. Check.

You're going to open the other tab. Everybody does. We'd rather say so than pretend otherwise — so open it. We'll wait.

When you're over there, check four things 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

We're not always the cheapest.

Sometimes you'll find it for less. Sometimes you'll find it for more. On a lot of brands the number is identical everywhere it's sold legitimately — the manufacturer sets a minimum advertised price and every authorized dealer holds it. When a price sits well under that, it's worth asking why before it's worth celebrating.

How pricing actually works
Authorized dealer · Square D

Or skip both tabs and buy it down the street. Find a store near you →

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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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Their Counter
Try local first · we'll wait

The stores we send you to are local and independently run — often for generations, the kind of place where someone behind the counter knows the regulars. We don't own them. We just think they deserve the foot traffic. They can put most of what we sell on their next truck. Ask there before you check out here.

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About our directory. National Hardware Group is an independent retailer and directory. The local stores we list and link to are separately owned and operated — we have no ownership stake in any of them, and most pay us nothing to be included. That includes plenty of stores flying a familiar banner that people don't realize are locally owned and run, not operated by a corporation. Store owners can choose to upgrade their listing for an enhanced presence or pickup features, but the base directory is free, and inclusion is never a paid endorsement.

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