Square D QOU330VH Miniature Circuit Breaker
- 30A
- 3 Pole
- Unit Mount
Square D
QOU330VH
Miniature Circuit Breaker
Brand
Square D
SKU
QOU330VH
Quantity
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Square D QOU330VH - 30A 3 Pole Miniature Circuit Breaker
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30A 3 Pole Miniature Circuit Breaker
30A 3 Pole Miniature Circuit Breaker
30A 3 Pole Miniature Circuit Breaker
Description
Designed for systems requiring elevated fault protection, this 3-pole 30A miniature circuit breaker boasts a high interrupting capacity of 22kAIC at 240VAC. It provides robust thermal-magnetic trip functions for commercial power distribution. The breaker utilizes a flexible unit mount configuration, allowing it to be installed onto standard DIN rails or integrated into OEM control panels. It includes reversible box lugs and features the signature Visi-Trip indicator for quick fault detection.Specifications
| Brand | Square D |
|---|---|
| Series | QOU |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 120/240VAC, 48VDC |
| Phase | 3 |
| AIC Rating | 22kA @ 240VAC, 22kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOU |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | DIN Rail Systems, OEM Panels, Control Panels |
| Wire Gauge | 14-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Mounting Feet, Padlock Attachment, Finger Safe Covers, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489, HACR Rated |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
Product FAQs
5 answersWhat is the recommended tightening torque for the box lugs on the QOU330VH?
The slotted box lugs should be torqued to 45 lb-in (5.08 N.m) for both copper and aluminum conductors ranging from 14 AWG to 2 AWG.
Can the QOU330VH be installed in a standard QO load center?
No. QOU series breakers are unit-mount devices designed for DIN rail, surface, or flush mounting in control panels and OEM equipment. They do not plug into or bolt onto standard QO or QOB busbars.
What does the VH designation mean in the QOU330VH catalog number?
The VH indicates a very high interrupting rating. While standard QOU breakers are rated at 10 kAIC, the QOU330VH is rated to safely interrupt up to 22 kAIC at 240VAC.
Is the QOU330VH suitable for reverse-feed applications?
Yes. Standard thermal-magnetic QOU circuit breakers do not have restricted line and load markings, making them suitable for reverse-feed wiring in control panels and OEM applications.
Are there field-installable accessories available for QOU breakers?
Yes. The QOU series supports various accessories, including QOUMF mounting feet for surface installation, jumper bars, and mechanical interlocks.
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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!