Square D QOU330-1200 QOU3301200 - 30A 3 Pole Miniature Circuit Breaker
- 30A
- 3 Pole
- Unit Mount
Square D
QOU330-1200
QOU3301200 - 30A 3 Pole Miniature Circuit Breaker
Brand
Square D
SKU
QOU330-1200
Quantity
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Square D QOU3301200 - 30A 3 Pole Miniature Circuit Breaker
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Description
Part of the QOU series, this 30A miniature circuit breaker includes a factory-installed auxiliary switch for advanced signaling and control panel integration. The three-pole unit mount design allows for flexible placement in DIN rail systems and custom enclosures. Delivering a 10kAIC rating at 240VAC, it provides robust thermal-magnetic protection for commercial and industrial applications. The breaker also features the Visi-Trip indicator to quickly spot tripped circuits.Specifications
| Brand | Square D |
|---|---|
| Series | QOU |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 120/240VAC, 48VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOU |
|---|---|
| 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 |
| Available Options | Mounting Feet, Padlock Attachment |
|---|---|
| Accessories | Auxiliary Switch (Factory Installed), 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
8 answersWhat does the -1200 suffix mean on the QOU330-1200?
The -1200 suffix indicates that this breaker includes a factory-installed auxiliary switch. This provides a set of contacts used for remote status monitoring or signaling within control panels.
Can the QOU330-1200 be mounted on a standard DIN rail?
Yes, QOU series breakers can be installed on a standard 35mm DIN rail. However, because this is a unit-mount breaker, you will need to use compatible snap-on DIN rail mounting feet, which are sold separately.
Is this circuit breaker reversible for line and load connections?
Yes, QOU circuit breakers are feed-thru devices with slotted box lugs on both ends. They can be reverse-fed, meaning the line and load connections are interchangeable.
What is the difference between Square D QO and QOU circuit breakers?
QO breakers are plug-on devices designed specifically for installation in Square D QO load centers. QOU breakers are unit-mount, cable-in/cable-out devices designed for surface, flush, or DIN rail mounting in OEM panels and custom enclosures.
Does this breaker provide a visual indication when it trips?
Yes, it features the Square D Visi-Trip indicator. When the breaker trips due to an overcurrent or short circuit event, a highly visible red indicator appears in the window to help quickly identify the faulted circuit.
What does the LI trip function code specify for this breaker?
The LI designation stands for Long-Time and Instantaneous trip functions. The Long-Time function provides thermal protection against sustained overloads, while the Instantaneous magnetic function trips the breaker immediately during a short circuit.
Is the QOU330-1200 suitable for HVAC equipment?
Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires HACR-type overcurrent protection.
Can I use aluminum wire with the box lugs on this breaker?
Yes, the box lugs are rated for both aluminum and copper conductors. They accept wire sizes ranging from 14 AWG to 2 AWG.
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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!