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Square D QOB290 Miniature Circuit Breaker
- 90A
- 2 Pole
- Bolt-On
Square D
QOB290
Miniature Circuit Breaker
Brand
Square D
SKU
QOB290
Quantity
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Square D QOB290 - 90A 2 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Square D QOB290 - 90A 2 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | QOB290 |
| Series | QOB |
| Amperage | 90A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOB |
|---|---|
| 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 |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Mercury Free, RoHS Compliant |
Sold out
Quantity
Square D QOB290 - 90A 2 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | QOB290-R |
| Series | QOB |
| Amperage | 90A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOB |
|---|---|
| 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 |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Mercury Free, RoHS Compliant |
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Description
Built for commercial power distribution, the Square D QOB290 delivers 90 amps of reliable thermal-magnetic protection. This two-pole miniature circuit breaker handles 120/240VAC loads. The device mounts securely into Square D NQ and NQOD panelboards using a robust bolt-on connection, ensuring a stable fit in high-vibration environments. It accepts 4 AWG to 2/0 AWG wiring. Rated for 10kAIC, the breaker includes the Visi-Trip indicator to flag tripped circuits and is fully HACR rated.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB290 |
| Series | QOB |
| Amperage | 90A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOB |
|---|---|
| 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 |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Mercury Free, RoHS Compliant |
Product FAQs
6 answersCan I install the QOB290 in a standard QO load center?
No, standard QO load centers only accept plug-on breakers. The QOB290 is a bolt-on breaker designed specifically for Schneider Electric NQ and NQOD panelboards.
What is the difference between the QO290 and QOB290 circuit breakers?
Both are 90A, 2-pole breakers from the Square D QO family, but they use different mounting methods. The QO290 is a plug-on breaker for residential and light commercial QO load centers, while the QOB290 is a bolt-on breaker designed for industrial NQ and NQOD panelboards.
How many panel spaces does the QOB290 require?
This 2-pole miniature circuit breaker requires two standard 3/4-inch spaces in a compatible NQ or NQOD panelboard.
What is the recommended tightening torque for the box lugs on the QOB290?
The manufacturer-specified tightening torque for the factory-installed box lugs is 49.6 lb-in (5.6 N-m) for securing 4 AWG to 2/0 AWG aluminum or copper conductors.
Does the QOB290 include a visual trip indicator?
Yes, this breaker features the Square D Visi-Trip indicator. A highly visible red indicator appears in the window when the breaker trips, making it easy to identify a tripped circuit inside a crowded panelboard.
Is the QOB290 circuit breaker HACR rated?
Yes, this breaker is HACR rated, meaning it is certified for use with heating, air conditioning, and refrigeration equipment that requires dedicated overcurrent protection.
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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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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 205 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 3/11/26
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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Rating
205 reviews
- BLBOOSTIX L.Verified BuyerReviewingSquare D QOB220 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/17/26QOB220
That's nice breakers!
- PHPaul H.Verified BuyerReviewingSquare D QOB330 - 30A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/5/26Quick shipping and delivery
Shipped and delivered on time for installation at one of our projects. Thank you!
- RMRick M.Verified BuyerReviewingSquare D QOB220 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Project Mgr
Just what I needed.
- DHDoug H.Verified BuyerReviewingSquare D QOB220 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Square D QOB breakers
As always, our order arrived timely, and accurate. You can’t beat their prices that’s why we have used this company for years.
- RKRyan K.Verified BuyerReviewingSquare D QOB230VH - 30A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/1/26Awesome
Worked great