Have a Happy and Safe 4th of July! Normal Shipping Hours Resume Monday 7/6/2026

Square D QO350 - 50A 3 Pole Miniature Circuit Breaker

Brand Square D
SKU QO350
4.9
Rated 4.9 out of 5 stars
296 Reviews
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99

Square D QO350 - 50A 3 Pole Miniature Circuit Breaker

Brand Square D
SKU QO350
4.9
Rated 4.9 out of 5 stars
296 Reviews
Select Item Condition
Earn 82 SuperPoints

Quantity
Planning a Big Order?
Bulk pricing available—let us know your needs for a quote.
Get a quote
Shop with Confidence
Enjoy a free 60-day warranty, extendable to 1 year at checkout.
Learn more

Square D QO350 - 50A 3 Pole Miniature Circuit Breaker

New

$82.99 In stock

Quantity

DescriptionSpecificationsSuperClubWarranties
Description
Built for residential and commercial applications, the QO350 provides robust overcurrent protection. This 50A, three-pole miniature circuit breaker features a standard 10kAIC rating at 240VAC to safeguard electrical systems. The plug-on design installs seamlessly into Square D QO load centers and NQ panelboards. It accepts 8-2 AWG wire via standard box lugs. Equipped with the exclusive Visi-Trip indicator, this HACR-rated breaker allows users to quickly identify tripped circuits.

Specifications

Brand Square D
Series QO
Part Number QO350
Amperage 50A
Voltage 240VAC, 120/240VAC, 48VDC
Poles 3
Phase 3
AIC Rating 10kA @ 240VAC, 10kA @ 120/240VAC, 5kA @ 48VDC
Mounting Style Plug-On
Terminal Type Box Lugs
For Use With QO Load Centers, NQ Panelboards
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed Thermal, Fixed Magnetic
Wire Gauge 8-2 AWG (Al/Cu)
Max Wire 2 AWG
Min Wire 8 AWG
Available Options Padlock Attachment, Handle Tie
Accessories None included
Standards UL 489, CSA C22.2 No. 5, HACR, RoHS, REACh
Approval CSA, UL
Temp Rating 40C
Construction Features Visual Trip Indicator, HACR Rated, Mercury Free, RoHS Compliant

SuperClub

Get rewarded every time you shop! Join SuperClub for free and start earning points on every purchase, unlocking exclusive discounts, special promos, and VIP perks. Already a member? Keep shopping to level up your rewards and enjoy even more benefits, including faster shipping, extended returns, and premium offers.

Learn more about SuperClub

Warranties

We’ve got you covered!

When shopping with SuperBreakers, you’ll have peace of mind knowing that every single item you purchase includes a 60 day warranty, free of charge. Why such confidence? Because only the highest quality electrical parts have a place on our shelves, and we stand by every single one we sell.

If anything goes wrong with your item that is not a result of misuse or normal wear and tear, we’ll gladly replace it at no cost to you.

Click here to read our full warranty details

Shipping

Free Shipping Policy

Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.

Click here to read our full shipping policy
Same Day Shipping

We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments

Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping

All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.

4.9
Rated 4.9 out of 5 stars
Based on 296 reviews
Total 5 star reviews: 278 Total 4 star reviews: 12 Total 3 star reviews: 2 Total 2 star reviews: 0 Total 1 star reviews: 4
Reviews Summary
Customers say these circuit breakers arrive quickly and work as described. Fast shipping and competitive pricing are frequently mentioned, with many noting same-day or next-day delivery. Users appreciate the wide inventory, particularly for hard-to-find older-style models unavailable locally. The products function reliably and arrive in good condition. Most customers report straightforward ordering and positive interactions. However, some experienced delivery delays or received incorrect items requiring reordering. A few noted concerns about condition upon arrival or customer service responsiveness.
Search
Search Reviews
Rating
Ratings
Write a Review (Opens in a new window)
296 reviews
  • WP
    Walter P.
    Verified Buyer
    Reviewing
    Square D QO120 - 20A 1 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    7/2/26
    St. Paul's Catholic Church

    The breakers arrived fast.

    Thanks

    Wp

    Was this helpful?
  • SN
    Shawn N.
    Verified Buyer
    Reviewing
    Square D QO2100CP - 100A 2 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    6/26/26
    Add a sub panel to the house

    Worked great in an older square d panel box

    Was this helpful?
  • TH
    Tate H.
    Verified Buyer
    Reviewing
    Square D PK15GTA Ground Bar
    I recommend this product
    Rated 5 out of 5 stars
    6/25/26
    Nice Ground Bars

    These will work great for our installation. They are packaged nicely and were shipped quickly.

    Was this helpful?
  • PJ
    Pamela J.
    Verified Buyer
    Reviewing
    Square D QO320 - 20A 3 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    6/19/26
    Exactly what ordered

    Thank you for receiving it so quickly!

    Was this helpful?
  • CH
    CLIFF H.
    Verified Buyer
    Reviewing
    Square D QO240 - 40A 2 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    6/19/26
    Work Great

    good breakers, great price and fast shipping

    Was this helpful?

Related Products

Recently Viewed