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Square D QOB270VH Miniature Circuit Breaker
- 70A
- 2 Pole
- Bolt-On
Square D
QOB270VH
Miniature Circuit Breaker
Brand
Square D
SKU
QOB270VH
Quantity
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Square D QOB270VH - 70A 2 Pole Miniature Circuit Breaker
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Description
Delivering reliable overcurrent protection for commercial applications, this 70A miniature breaker integrates seamlessly into Square D NQ and NQOD panelboards. The bolt-on mounting style provides a robust mechanical connection to the busbar, preventing loosening in high-vibration environments. Featuring the signature Visi-Trip indicator, maintenance personnel can quickly identify tripped circuits, while the 22kAIC rating handles higher fault currents typical in commercial electrical systems.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB270VH |
| Series | QOB |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 240VAC, 22kA @ 120/240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | NQ Panelboards, NQOD Panelboards |
| Wire Gauge | 8-2 AWG (Cu/Al) |
| 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | HACR, UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, High Interrupting Capacity, Common Trip |
Product FAQs
6 answersWhat panelboards are compatible with the QOB270VH circuit breaker?
This bolt-on breaker is designed specifically for Square D NQ and NQOD panelboards. It cannot be installed in standard QO load centers, which require plug-on breakers.
What does the VH designation indicate on this breaker?
The VH suffix denotes a very high interrupting rating. The QOB270VH is rated for 22kAIC at 120/240VAC, whereas the standard QOB270 is rated for 10kAIC.
What is the plug-on equivalent of the QOB270VH?
The plug-on equivalent is the QO270VH. You would use the QO270VH for standard QO load centers, while the QOB270VH is strictly for bolt-on panelboard applications.
Does this breaker include a tripped circuit indicator?
Yes, it features the Square D Visi-Trip visual indicator. When the breaker trips, a bright red flag appears in the indicator window to help maintenance personnel quickly identify the faulted circuit.
What are the wire size and torque requirements for the box lugs?
The terminals accept 8 AWG to 2 AWG copper or aluminum conductors. The manufacturer specifies a tightening torque of 44.3 to 49.6 lb-in (5.0 to 5.6 N.m) depending on the exact wire size and material used.
How does the bolt-on mounting benefit commercial installations?
The bolt-on connection secures the breaker directly to the panelboard busbar with a screw. This creates a robust, vibration-resistant mechanical connection that prevents loosening over time in demanding commercial and industrial environments.
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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