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Square D QOB370VH Miniature Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Square D
QOB370VH
Miniature Circuit Breaker
Brand
Square D
SKU
QOB370VH
Quantity
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Square D QOB370VH - 70A 3 Pole Miniature Circuit Breaker
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Description
Mounts into Square D NQ and NQOD panelboards to provide reliable branch circuit protection for commercial systems. This 70A, three-pole miniature breaker features a bolt-on design that ensures a secure, vibration-resistant connection to the busbar. Rated at 22 kAIC at 120/240VAC, the QOB370VH utilizes thermal-magnetic trip technology for precise overload and short-circuit response. It includes the signature Visi-Trip indicator, which displays a red flag when tripped to reduce downtime.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB370VH |
| Series | QOB |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 120/240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 120VAC, 22kA @ 240VAC, 22kA @ 120/240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | NQ Panelboards, NQOD Panelboards |
| Wire Gauge | 8-2 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 | Shunt Trip, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, High Interrupting Capacity |
Product FAQs
6 answersCan I install the QOB370VH in a standard QO load center?
No. The QOB370VH is a bolt-on circuit breaker designed specifically for NQ and NQOD panelboards. Standard QO load centers require plug-on breakers.
What is the plug-on equivalent to the QOB370VH?
The QO370VH is the plug-on equivalent of this breaker, designed for use in standard QO load centers.
What does the "VH" suffix indicate on the QOB370VH?
The "VH" suffix indicates a high interrupting rating of 22 kAIC at 120/240VAC. Standard QOB breakers without this suffix typically have a 10 kAIC rating.
How many panel spaces does the QOB370VH require?
This 3-pole breaker requires three standard 3/4-inch spaces in a panelboard, taking up a total width of 2.25 inches.
Does the QOB370VH provide ground fault or arc fault protection?
No. This is a standard thermal-magnetic circuit breaker. It does not include Ground Fault Circuit Interrupter (GFCI) or Arc Fault Circuit Interrupter (AFCI) features.
Can the QOB370VH be used on a 480V system?
No. The QOB370VH is rated for a maximum of 240V and is designed for NQ or NQOD panelboards. For 480Y/277V applications, you would need an E-frame breaker like the EDB34070, which installs in Square D NF panelboards.
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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