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Square D QO3501021 - 50A 3 Pole Miniature Circuit Breaker

Brand Square D
SKU QO3501021
4.9
Rated 4.9 out of 5 stars
273 Reviews
Free Shipping Over $99

Square D QO3501021 - 50A 3 Pole Miniature Circuit Breaker

Brand Square D
SKU QO3501021
4.9
Rated 4.9 out of 5 stars
273 Reviews
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Earn 368 SuperPoints

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Square D QO3501021 - 50A 3 Pole Miniature Circuit Breaker

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$368.46 In stock

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DescriptionSpecificationsSuperClubWarranties
Description
Providing advanced control for commercial systems, this 50A miniature circuit breaker includes a factory-installed 120/208/240VAC shunt trip. This allows the breaker to be tripped from a remote location using a separate voltage signal. The three-pole device requires four panel spaces and utilizes a plug-on connection to install into Square D QO load centers and NQ panelboards. Rated for 10kAIC at 240VAC, it features thermal-magnetic protection and the signature Visi-Trip indicator.

Specifications

Brand Square D
Series QO
Part Number QO350-1021
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 (Cu/Al)
Max Wire 2 AWG
Min Wire 8 AWG
Available Options Padlock Attachment
Accessories Shunt Trip
Standards CSA C22.2 No. 5, HACR, UL 489
Approval CSA, UL
Temp Rating 40C
Construction Features Visual Trip Indicator, HACR Rated

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Warranties

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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 273 reviews
Total 5 star reviews: 260 Total 4 star reviews: 12 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
Reviews Summary
Customers say these circuit breakers fit properly and work as expected. Many reviews mention fast shipping and competitive pricing compared to local suppliers. Users frequently note the company's extensive inventory, particularly for hard-to-find or specialty breakers. Common feedback includes satisfaction with product quality and reliable performance. Several customers appreciate finding items unavailable at local stores. While most praise the quick delivery and packaging, one customer experienced receiving the wrong amperage breaker. Overall, reviewers consistently highlight the combination of good pricing, fast service, and product availability.
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273 reviews
  • JC
    Joseph C.
    Verified Buyer
    Reviewing
    Square D QO120GFI - 20A GFCI Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    3/12/26
    Great Vendor

    We love working with SuperBreakers, they carry a lot of stock for the parts we need, quick shipping and willing to give discounts on large quantity orders.

    Was this helpful?
  • AW
    Adam W.
    Verified Buyer
    Reviewing
    Square D QO115GFI - 15A GFCI Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    2/26/26
    15A Circuit Breaker

    Great price and value. SuperBreakers is the is a great company to do business with!

    Was this helpful?
  • AW
    Adam W.
    Verified Buyer
    Reviewing
    Square D QO220GFI - 20A GFCI Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    2/24/26
    20A Circuit Breaker

    Works well and priced right

    Was this helpful?
  • AW
    Adam W.
    Verified Buyer
    Reviewing
    Square D QO220 - 20A 2 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    2/24/26
    Circuit Breaker 20A

    Works great

    Was this helpful?
  • MC
    Michael C.
    Verified Buyer
    Reviewing
    Square D QO120AFI - 20A AFCI Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    2/20/26
    fast delivery, packaging was good.

    I trust SuperBreakers to provide me with quality circuit breakers.

    Was this helpful?

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