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Square D QOB280-1021 2 Pole Circuit Breaker
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Square D QOB280-1021 QOB2801021 - 80A 2 Pole Miniature Circuit Breaker

  • 80A
  • 2 Pole
  • Bolt-On
Square D QOB280-1021
QOB2801021 - 80A 2 Pole Miniature Circuit Breaker
Brand Square D
SKU QOB280-1021
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  • 80A
  • 2 Pole
  • Bolt-On

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Square D QOB280-1021 2 Pole Circuit Breaker

Square D QOB2801021 - 80A 2 Pole Miniature Circuit Breaker

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$420.50 No Stock

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Description SpecificationsProduct FAQs SuperClub Warranties Shipping Reviews 4.9 (211)

Description

Integrating a factory-installed shunt trip mechanism, this specialized 80-amp breaker enables remote tripping from external signals like fire alarms or emergency stop buttons. It fastens securely into Square D NQ and NQOD panelboards via a rugged bolt-on connection. Along with standard thermal-magnetic overcurrent protection at 10kAIC, the unit retains the signature Visi-Trip indicator to help facility managers quickly distinguish between a manual disconnect and an actual electrical fault.

Specifications

Key specifications
Brand Square D
Part Number QOB280-1021
Series QOB
Amperage 80A
Poles 2
Mounting Style Bolt-On
Voltage 120/240VAC, 48VDC
Phase 1
AIC Rating 10kA @ 120/240VAC, 5kA @ 48VDC
Fit and installation
Terminal Type Box Lugs
For Use With NQ Panelboards, NQOD Panelboards
Wire Gauge 4 AWG - 2/0 AWG (Al/Cu)
Max Wire 2/0 AWG
Min Wire 4 AWG
Protection and operation
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed
Standards and features
Available Options Padlock Attachment
Accessories Shunt Trip
Standards CSA C22.2 No. 5, HACR, UL 489
Approval CSA, UL
Temp Rating 40C
Construction Features HACR Rated, Visual Trip Indicator

Product FAQs

6 answers
What panelboards are compatible with the QOB280-1021?

This bolt-on miniature circuit breaker is designed specifically for Square D NQ and NQOD panelboards. It is not compatible with standard QO residential load centers, which require plug-on breakers.

What does the -1021 suffix mean on this Square D breaker?

The -1021 suffix indicates that the breaker includes a factory-installed shunt trip mechanism rated for 120V to 240V AC. This allows the breaker to be tripped remotely by an external signal, such as a fire alarm or emergency stop button.

What is the difference between the QOB280 and the QOB280-1021?

The QOB280 is the standard 80A 2-pole bolt-on breaker. The QOB280-1021 is the exact same breaker but includes a factory-installed 120V to 240V AC shunt trip for remote tripping capabilities.

How many panel spaces does the QOB280-1021 require?

Although it is a 2-pole breaker, the factory-installed shunt trip requires an additional pole space. Therefore, it takes up a total of 3 panel spaces in your NQ or NQOD panelboard.

How is the shunt trip wired on the QOB280-1021?

The shunt trip features its own terminals that accept two 14 AWG to 12 AWG copper wires. The hot and neutral control wires can be connected to either terminal to provide the 120V to 240V AC trip signal.

Does this breaker include a visual trip indicator?

Yes, it features the Square D Visi-Trip indicator. When the breaker trips, a highly visible red indicator appears, allowing you to quickly identify the tripped breaker in the panel.

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Shipping

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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.

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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.

Reviews

4.9
Rated 4.9 out of 5 stars
Based on 211 reviews
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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211 reviews
  • ML
    Mike L.
    Verified Buyer
    Reviewing
    Square D QOB250 - 50A 2 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    10/9/26
    breaker orders

    Breaker worked out great

    Can not be happier with the quick shipping

    Was this helpful?
  • RC
    Richard C.
    Verified Buyer
    Reviewing
    Square D QOB380 - 80A 3 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    10/7/26
    Great price quick turn around

    Thank you for getting me the breaker in a timely fashion

    Was this helpful?
  • DS
    Darren S.
    Verified Buyer
    Reviewing
    Square D QOB250 - 50A 2 Pole Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    10/5/26
    Airport taxi lighting

    After contactor replacement we discovered bad breakers and were able to get replacements from Super Breakers in 2 days. THANK YOU SUPER BREAKERS..

    Was this helpful?
  • MR
    Miguel R.
    Verified Buyer
    Reviewing
    Square D QOB220GFI - 20A GFCI Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    10/1/26
    Excellent

    Excellent product and service

    Was this helpful?
  • MR
    Miguel R.
    Verified Buyer
    Reviewing
    Square D QOB230GFI - 30A GFCI Miniature Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    10/1/26
    Excellent

    Excellent product and service

    Was this helpful?