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Square D QOB240GFI - 40A GFCI Miniature Circuit Breaker

Brand Square D
SKU QOB240GFI
4.9
Rated 4.9 out of 5 stars
188 Reviews
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99

Square D QOB240GFI - 40A GFCI Miniature Circuit Breaker

Brand Square D
SKU QOB240GFI
4.9
Rated 4.9 out of 5 stars
188 Reviews
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Earn 279 SuperPoints

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Square D QOB240GFI - 40A GFCI Miniature Circuit Breaker

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$279.98 In stock

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DescriptionSpecificationsSuperClubWarranties
Description
Engineered for commercial and industrial applications, this 40A miniature breaker delivers reliable ground fault protection. It mounts into Square D NQ and NQOD panelboards using a secure bolt-on connection. Featuring Visi-Trip technology for quick fault identification, the unit provides a 10kA interrupting rating and includes a pigtail neutral to meet NEC requirements for wet or damp locations.

Specifications

Brand Square D
Series QOB
Amperage 40A
Voltage 120/240VAC
Poles 2
Phase 1
AIC Rating 10kA @ 120/240VAC
Special Classification GFCI
Mounting Style Bolt-On
Terminal Type Box Lugs
For Use With NQ Panelboards, NQOD Panelboards
Trip Technology Thermal Magnetic
Trip Function Code LIG
Trip Function Long-Time, Instantaneous, Ground Fault
Trip Adjustability Fixed
Wire Gauge 8-2 AWG (Al/Cu)
Max Wire 2 AWG
Min Wire 8 AWG
Available Options Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment
Accessories Pigtail Neutral
Standards CSA C22.2 No. 144, UL 489, UL 943
Approval CSA, UL
Temp Rating 40C
Construction Features 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 188 reviews
Total 5 star reviews: 181 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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188 reviews
  • 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?
  • RM
    Richard M.
    Verified Buyer
    Reviewing
    Square D QOB350VH - 50A 3 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    2/10/26
    Breaker

    The breaker was exactly what we ordered. Breaker works perfect.

    Was this helpful?
  • RC
    Randy C.
    Verified Buyer
    Reviewing
    Square D QOB120GFI - 20A GFCI Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    2/9/26
    GFCI Breakers

    Good price, prompt delivery.

    Was this helpful?

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