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Square D QOB2501021 - 50A 2 Pole Miniature Circuit Breaker

Brand Square D
SKU QOB250-1021
4.9
Rated 4.9 out of 5 stars
190 Reviews
Square D QOB250-1021 2 Pole Circuit Breaker
Free Shipping Over $99

Square D QOB2501021 - 50A 2 Pole Miniature Circuit Breaker

Brand Square D
SKU QOB250-1021
4.9
Rated 4.9 out of 5 stars
190 Reviews
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Earn 305 SuperPoints

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Square D QOB250-1021 2 Pole Circuit Breaker

Square D QOB2501021 - 50A 2 Pole Miniature Circuit Breaker

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$305.60 No stock

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DescriptionSpecificationsSuperClubWarranties
Description
Part of the QO family, the Square D QOB250-1021 is a two-pole, 50A miniature circuit breaker. It operates at 120/240VAC and includes a factory-installed 120/208/240V shunt trip mechanism for remote circuit interruption. This bolt-on breaker mounts into NQ and NQOD panelboards, ensuring a secure connection. The box lug terminals accommodate 8-2 AWG wiring for versatile installation.

Specifications

Brand Square D
Series QOB
Part Number QOB2501021
Amperage 50A
Voltage 120VAC, 120/240VAC, 48VDC
Poles 2
Phase 1
AIC Rating 10kA @ 120VAC, 10kA @ 120/240VAC, 5kA @ 48VDC
Mounting Style Bolt-On
Terminal Type Box Lugs
For Use With NQ Panelboards, NQOD Panelboards
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed
Wire Gauge 8-2 AWG (Al/Cu)
Max Wire 2 AWG
Min Wire 8 AWG
Available Options Auxiliary Switch, Alarm Switch, Padlock Attachment
Accessories Shunt Trip (Factory Installed), Load Side Lugs Included
Standards CSA C22.2 No. 5, UL 489, NEMA AB 1
Approval CSA, HACR, UL
Temp Rating 40C
Construction Features HACR Rated, Visual Trip Indicator

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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 190 reviews
Total 5 star reviews: 183 Total 4 star reviews: 6 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 1
Reviews Summary
Customers say these electrical breakers arrive exactly as ordered and work perfectly for their intended applications. They consistently praise the competitive pricing, which many report is significantly lower than local suppliers. Fast shipping and prompt delivery are frequently highlighted, with many receiving orders within days or even next-day delivery for urgent needs. The breakers arrive well-packaged and in excellent condition. Many reviews emphasize the company's extensive inventory availability, particularly for hard-to-find breakers. One customer experienced difficulty with order cancellation and was charged a restocking fee, which caused dissatisfaction.
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190 reviews
  • SK
    Shea K.
    Verified Buyer
    Reviewing
    Square D QOB120GFI - 20A GFCI Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    3/23/26
    Excellent Site

    I have been ordering breakers off of this website for about two years now. I have always got exactly what I ordered and they have always been delivered when they have said they would. You cannot ask for much more than that. 👍 I will continue to order from here.

    Was this helpful?
  • CC
    CURTIS C.
    Verified Buyer
    Reviewing
    Square D QOB350 - 50A 3 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    3/13/26
    50 amp 240v 3 phase breaker

    Fraction of the cost compared to local supplier. Super fast shipping!! Definitely will do buisness with again. Thank You !!!

    Was this helpful?
  • MK
    Michael K.
    Verified Buyer
    Reviewing
    Square D QOB250 - 50A 2 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    3/11/26
    Happy Contractor

    Arrived as described and in a timely manner. Would recommend SuperBreakers for your Electrical needs.

    Was this helpful?
  • JS
    Jeff S.
    Verified Buyer
    Reviewing
    Square D QOB380 - 80A 3 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    3/10/26
    Breaker arrived and presented as desribed.

    Prompt delivery and process went very smooth. I will use their services in the future. Thank you!

    Was this helpful?
  • MB
    Mark B.
    Verified Buyer
    Reviewing
    Square D QOB220 - 20A 2 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    3/3/26
    Breakers

    Fast shipping. Just what we ordered.

    Was this helpful?

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