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Square D QO270-1021 QO2701021 - 70A 2 Pole Miniature Circuit Breaker
- 70A
- 2 Pole
- Plug-On
Square D
QO270-1021
QO2701021 - 70A 2 Pole Miniature Circuit Breaker
Brand
Square D
SKU
QO270-1021
Quantity
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Square D QO2701021 - 70A 2 Pole Miniature Circuit Breaker
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Description
Built for commercial and industrial safety systems, this 70-amp unit incorporates remote tripping capabilities alongside standard thermal-magnetic protection. It is frequently utilized in emergency stop circuits or automated shutdown sequences. The device installs into QO load centers and NQ panelboards. It requires additional space compared to standard modules due to the integrated accessory. The factory-installed 120/208/240VAC shunt trip activates when an external voltage is applied.Specifications
| Brand | Square D |
|---|---|
| Part Number | QO270-1021 |
| Series | QO |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QO |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | QO Load Centers, NQ Panelboards |
| Wire Gauge | 8 AWG - 2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Shunt Trip (120/208/240VAC) |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
7 answersCan I install the QO270-1021 in a Square D Homeline panel?
No. QO series breakers are not interchangeable with Homeline breakers. This breaker is strictly for use in Square D QO load centers and NQ panelboards.
What does the -1021 suffix indicate on this Square D circuit breaker?
The -1021 suffix means this breaker includes a factory-installed shunt trip accessory. This allows the breaker to be tripped remotely when a voltage signal is applied.
What is the control voltage for the shunt trip accessory on this breaker?
The factory-installed shunt trip operates on a 120/208/240VAC control voltage signal to remotely open the circuit breaker.
How many panel spaces does the QO270-1021 require?
This breaker requires 3 panel spaces. The standard 2-pole breaker occupies 2 spaces, and the factory-installed shunt trip accessory requires 1 additional space.
Does this breaker feature a tripped circuit indicator?
Yes, it includes the Square D Visi-Trip indicator, which provides a highly visible red flag in the window when the breaker has tripped.
Is the QO270-1021 HACR rated?
Yes, this breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment.
What are the alternate part numbers for the QO270-1021?
This breaker is frequently listed as QO2701021 without the hyphen.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 286 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 6/13/26
Customers say these circuit breakers arrive quickly and work as described. Fast shipping and competitive pricing are frequently mentioned, with many noting same-day or next-day delivery. Users appreciate the wide inventory, particularly for hard-to-find older-style models unavailable locally. The products function reliably and arrive in good condition. Most customers report straightforward ordering and positive interactions. However, some experienced delivery delays or received incorrect items requiring reordering. A few noted concerns about condition upon arrival or customer service responsiveness.
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Rating
286 reviews
- RBRobert B.Verified BuyerReviewingSquare D QO120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/5/26Square D Q0120-20A circuit breaker
This device was delivered on time as advertised and it was in excellent condition. The installation process was simple and straightforward, and the unit worked perfectly when connected to the electric circuit.
I am completely satisfied and will utilize this component resource for my future electrical needs.
- GCGerard C.Verified BuyerReviewingSquare D QO130GFI - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/21/26Great !
I could not find the breaker in hardwood stores. Superbreakers took car of it in a week.
- RHRoy H.Verified BuyerReviewingSquare D QO280 - 80A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/17/26Square D QO280 - 80A 2 Pole Miniature Circuit Breaker
Exactly as described
- KWKevin W.Verified BuyerReviewingSquare D QO120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/15/26Great Price
Brand spanking new!
- CEchristopher e.Verified BuyerReviewingSquare D QO115PDF - 15A Dual Function Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/11/26My breakers
Had a hard time locating these breakers locally, when I did find 1 they wanted to charge me triple what superbreakers charged. Items delivered exactly when they said they would, were exactly what I ordered. Appreciated the ease of ordering, definitely my go to from this point on