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Square D QO320VH Miniature Circuit Breaker
- 20A
- 3 Pole
- Plug-On
Square D
QO320VH
Miniature Circuit Breaker
Brand
Square D
SKU
QO320VH
Quantity
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Square D QO320VH - 20A 3 Pole Miniature Circuit Breaker
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Description
Built for systems requiring elevated interrupting capacity, this 20-amp component provides reliable thermal-magnetic protection for three-phase commercial and industrial loads. The unit incorporates Square D's signature Visi-Trip indicator to help maintenance personnel quickly spot tripped circuits. Designed for seamless integration, it mounts into standard QO load centers, NQ panelboards, and Speed-D switchboards. Rated at 22kAIC, this VH-series model exceeds standard 10kA limits.Specifications
| Brand | Square D |
|---|---|
| Part Number | QO320VH |
| Series | QO |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 120VAC, 240VAC, 120/240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 120VAC, 22kA @ 240VAC, 22kA @ 120/240VAC |
| Frame Type | QO |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | QO Load Centers, NQ Panelboards, Speed-D Switchboard Distribution Panels |
| Wire Gauge | 14-8 AWG (Al/Cu) |
| Max Wire | 8 AWG |
| Min Wire | 14 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 |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, Common Trip, High Interrupting Capacity |
Product FAQs
5 answersCan I install the QO320VH in a Homeline panel?
No. Square D QO and Homeline breakers are not interchangeable. The QO320VH is designed exclusively for QO load centers, NQ panelboards, and Speed-D switchboards.
Does this breaker require a 3-phase panel?
Yes. As a 3-pole breaker, the QO320VH requires a 3-phase load center or panelboard to properly connect to all three phases.
What does the VH suffix indicate in the QO320VH catalog number?
The VH suffix indicates a Very High interrupting rating. This model provides a 22kAIC rating, which exceeds the 10kAIC rating found on standard QO circuit breakers.
Is there a bolt-on equivalent for the QO320VH?
Yes. If your installation requires bolt-on connections, such as in certain NQ or NQOD panelboards, you will need the QOB320VH instead of this plug-on model.
Does the QO320VH feature a tripped circuit indicator?
Yes, it includes the Square D Visi-Trip indicator. When the breaker trips, a highly visible red indicator appears in the window to help you quickly identify the tripped circuit.
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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