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Square D QOU270 Miniature Circuit Breaker
- 70A
- 2 Pole
- Unit Mount
Square D
QOU270
Miniature Circuit Breaker
Brand
Square D
SKU
QOU270
Quantity
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Square D QOU270 - 70A 2 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Square D QOU270 - 70A 2 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | QOU270 |
| Series | QOU |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOU |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | DIN Rail Systems, OEM Panels, Enclosures, Control Panels |
| Wire Gauge | 14-2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Mounting Feet, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Common Trip |
Sold out
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Square D QOU270 - 70A 2 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | QOU270-R |
| Series | QOU |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOU |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | DIN Rail Systems, OEM Panels, Enclosures, Control Panels |
| Wire Gauge | 14-2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Mounting Feet, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Common Trip |
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Description
Part of the QOU series by Square D, this 70A, two-pole miniature circuit breaker is designed for residential, commercial, and industrial applications. It provides robust thermal-magnetic protection for branch circuits and equipment. The unit-mount design allows it to install onto standard 35mm DIN rails, surface mounts, or OEM panels. It accepts 14-2 AWG aluminum or copper wiring via standard box lugs. Featuring a 10kAIC rating at 120/240VAC, it includes the signature Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOU270 |
| Series | QOU |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOU |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | DIN Rail Systems, OEM Panels, Enclosures, Control Panels |
| Wire Gauge | 14-2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Mounting Feet, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Common Trip |
Product FAQs
8 answersIs this breaker suitable for reverse feeding?
Yes, the Square D QOU270 features field-reversible line and load box lugs, making it suitable for reverse-feed and back-feed applications in OEM and control panels.
What is the recommended tightening torque for the wire terminals?
The slotted box lugs on both the line and load sides should be torqued to 45 lb-in when using 14-2 AWG copper or aluminum wire.
Will the QOU270 install in a standard Square D QO load center?
No. While they share similar internal mechanisms, QOU breakers are independent unit-mount devices designed for OEM panels and enclosures. They do not snap onto QO busbars or bolt onto QOB panelboards.
How does a QOU breaker mount inside an enclosure?
QOU breakers are versatile unit-mount devices. They can be surface-mounted, flush-mounted, or secured to a symmetrical 35mm DIN rail using the correct mounting hardware.
What accessory is needed to mount this 2-pole breaker on a DIN rail?
To mount a 2-pole QOU breaker like the QOU270 onto a standard 35mm DIN rail system, you will need a QOUMF2 mounting foot bracket.
How can I visually identify if the QOU270 has tripped?
This model features the built-in Square D Visi-Trip indicator. When the breaker trips due to an overcurrent or short circuit, a highly visible red flag appears in the indicator window.
Does this breaker feature a high magnetic trip curve?
No, the standard QOU270 features a standard fixed thermal-magnetic trip curve. Applications requiring high initial inrush tolerances require breakers with an HM catalog suffix.
Can the QOU270 be used in DC applications?
Yes. In addition to its standard AC ratings, this breaker is UL Listed for use in 48VDC control and power systems with a 5 kAIC interrupting capacity.
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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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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
Review summary
Customers rate this product 5.0 out of 5 based on 106 reviews.
Reviews Summary
Generated by AI from 99 most recent customer reviews
Last updated 5/14/26
Customers say these circuit breakers function properly and arrive quickly. Many reviews highlight fast shipping, competitive pricing, and reliable product condition upon arrival. Users appreciate the wide selection, including hard-to-find models, and note the breakers work as expected for various applications. Common feedback addresses quick order processing and easy website navigation. Most customers report satisfaction with value and delivery speed, with many indicating they will purchase again.
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Rating
106 reviews
- HLHOMETIGO L.Verified BuyerReviewingSquare D QOU260 - 60A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/7/26Good thing
i recommend this for you
- RGRobert G.Verified BuyerReviewingSquare D QOU340 - 40A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/3/26Circuit breakers
I appreciate the fact that you had these in stock. my Square D distributor does not seem to stock these anymore and it takes a couple weeks to get. your pricing is inline with theirs.
- THTiffany H.Verified BuyerReviewingSquare D QOU115 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/28/26Will use Super Breakers again
Arrived in a timely manner. Exactly what we needed for a job.
- CSCary S.Verified BuyerReviewingSquare D QOU250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/12/26Just what I ordered
Just what I needed for dock pedestal
- MHMark H.Verified BuyerReviewingSquare D QOU250VH - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/11/26Square D QOU250VH - 50A 2 Pole Miniature Circuit Breaker
Was just what I expected!