Square D QOU320VH Miniature Circuit Breaker
- 20A
- 3 Pole
- Unit Mount
Square D
QOU320VH
Miniature Circuit Breaker
Brand
Square D
SKU
QOU320VH
Quantity
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Square D QOU320VH - 20A 3 Pole Miniature Circuit Breaker
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20A 3 Pole Miniature Circuit Breaker
20A 3 Pole Miniature Circuit Breaker
Description
Engineered for demanding environments, the Square D QOU320VH is a 3-pole, 20A miniature circuit breaker with a high interrupting capacity. This unit-mount breaker installs into OEM panels, control enclosures, and DIN rail systems. It accepts 14-2 AWG wire and features reversible line and load lugs for flexible wiring. With an upgraded 22 kAIC rating at 240VAC, this model handles higher fault currents than standard QOU breakers. It includes a Visi-Trip indicator for quick fault spotting.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOU320VH |
| Series | QOU |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 120/240VAC, 48VDC |
| Phase | 3 |
| AIC Rating | 22kA @ 240VAC, 22kA @ 120/240VAC, 5kA @ 48VDC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | DIN Rail Systems, OEM Panels, Control Panels, Enclosures |
| Wire Gauge | 14-2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Mounting Feet, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Reversible Feed, High Interrupting Capacity, Common Trip |
Product FAQs
8 answersHow is the Square D QOU320VH circuit breaker mounted?
The QOU320VH is a unit-mount circuit breaker designed for standalone installation. It can be surface mounted, flush mounted, or installed on a standard DIN rail using a compatible Square D mounting bracket, making it ideal for custom control panels.
What does the VH suffix indicate on the QOU320VH?
The VH suffix designates a very high interrupting rating. While standard QOU breakers are typically rated at 10kA, the QOU320VH is rated to safely interrupt up to 22kA at 240VAC.
What wire sizes are accepted by the QOU320VH terminals?
The factory-installed box lugs accept 14 AWG to 2 AWG conductors. The terminals are rated for both aluminum and copper wiring.
Is the QOU320VH rated for direct current (DC) systems?
Yes, in addition to its AC ratings, this breaker is UL listed for DC applications up to 48VDC with a 5kA interrupting capacity.
What is the recommended terminal torque for the QOU320VH?
The box lug terminals on this 20A breaker should be tightened to 45 lb-in to ensure a secure and compliant connection.
Can I use the QOU320VH to replace a standard QOU320?
Yes, the QOU320VH shares the same physical dimensions and mounting footprint as the standard QOU320, but provides a higher interrupting rating (22kA vs 10kA). It is a direct, upgraded replacement where higher fault current protection is required.
What type of protection does the QOU320VH provide?
It features a fixed thermal-magnetic trip unit that provides long-time (L) protection against overloads and instantaneous (I) protection against short circuits.
Can this breaker be installed in a standard QO load center?
No, the QOU320VH is a unit-mount breaker designed for OEM panels, DIN rail systems, and enclosures. It does not have the plug-on or bolt-on clips required for standard QO or QOB load centers.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 106 reviews.
Reviews Summary
Generated by AI from 99 most recent customer reviews
Last updated 5/14/26
Customers say these circuit breakers function properly and arrive quickly. Many reviews highlight fast shipping, competitive pricing, and reliable product condition upon arrival. Users appreciate the wide selection, including hard-to-find models, and note the breakers work as expected for various applications. Common feedback addresses quick order processing and easy website navigation. Most customers report satisfaction with value and delivery speed, with many indicating they will purchase again.
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Rating
106 reviews
- HLHOMETIGO L.Verified BuyerReviewingSquare D QOU260 - 60A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/7/26Good thing
i recommend this for you
- RGRobert G.Verified BuyerReviewingSquare D QOU340 - 40A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/3/26Circuit breakers
I appreciate the fact that you had these in stock. my Square D distributor does not seem to stock these anymore and it takes a couple weeks to get. your pricing is inline with theirs.
- THTiffany H.Verified BuyerReviewingSquare D QOU115 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/28/26Will use Super Breakers again
Arrived in a timely manner. Exactly what we needed for a job.
- CSCary S.Verified BuyerReviewingSquare D QOU250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/12/26Just what I ordered
Just what I needed for dock pedestal
- MHMark H.Verified BuyerReviewingSquare D QOU250VH - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/11/26Square D QOU250VH - 50A 2 Pole Miniature Circuit Breaker
Was just what I expected!