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Square D QO370VH Miniature Circuit Breaker
- 70A
- 3 Pole
- Plug-On
Square D
QO370VH
Miniature Circuit Breaker
Brand
Square D
SKU
QO370VH
Quantity
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Square D QO370VH - 70A 3 Pole Miniature Circuit Breaker
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Description
Part of the QO series, the QO370VH is a 3-pole, 70A miniature circuit breaker designed for environments requiring elevated fault protection. It features a high interrupting capacity rated at 22kAIC at 240VAC. This plug-on breaker mounts into Square D QO load centers, NQ panelboards, and Speed-D switchboards. It accepts 8-2 AWG aluminum or copper wiring. Built with thermal-magnetic trip technology, it ensures reliable defense against overloads.Specifications
| Brand | Square D |
|---|---|
| Part Number | QO370VH |
| Series | QO |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC, 120/240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 240VAC, 22kA @ 120/240VAC |
| Frame Type | QO |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | QO Load Centers, NQ Panelboards, Speed-D Switchboards |
| 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 | Auxiliary Switch, Alarm Switch, Padlock Attachment, Shunt Trip |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489, HACR |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, High Interrupting Capacity, Mercury Free, Common Trip |
Product FAQs
5 answersCan I install the QO370VH in a standard residential QO load center?
No. The QO370VH is a 3-pole breaker designed for 3-phase systems. Most standard residential QO load centers are single-phase and cannot accommodate a 3-pole breaker. You must use a compatible 3-phase QO load center, NQ panelboard, or Speed-D switchboard.
What does the "VH" suffix indicate on the QO370VH?
The "VH" suffix designates a high interrupting rating. While a standard QO370 is rated for 10kAIC, the QO370VH is rated for 22kAIC at 120/240VAC, making it suitable for commercial or industrial applications with higher available fault currents.
How much panel space is required to install the QO370VH?
As a 3-pole miniature circuit breaker, the QO370VH requires three standard 3/4-inch spaces in a compatible Square D panelboard or load center.
What is the bolt-on equivalent to the QO370VH?
If your panel requires a bolt-on connection rather than a plug-on connection, you will need the QOB equivalent. The direct bolt-on replacement is the QOB370VH.
How can I tell if the QO370VH has tripped?
The QO370VH features Square D Visi-Trip technology. When the breaker trips due to an overcurrent or short circuit, the handle snaps to a center position and a bright red indicator appears in a window on the breaker face, allowing for quick identification in a crowded panel.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 285 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
285 reviews
- 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
- JCJerry C.Verified BuyerReviewingSquare D QO250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/8/26Great quality
No issues