Square D QOU350-1200 QOU3501200 - 50A 3 Pole Miniature Circuit Breaker
- 50A
- 3 Pole
- Unit Mount
Square D
QOU350-1200
QOU3501200 - 50A 3 Pole Miniature Circuit Breaker
Brand
Square D
SKU
QOU350-1200
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Square D QOU3501200 - 50A 3 Pole Miniature Circuit Breaker
New
Quantity
Similar Items
50A 3 Pole Miniature Circuit Breaker
45A 3 Pole Miniature Circuit Breaker
40A 3 Pole Miniature Circuit Breaker
Description
Part of the Square D QOU series, this 50A, three-pole miniature circuit breaker is designed for surface, flush, or DIN rail mounting in commercial and industrial control panels. The QOU350-1200 comes equipped with a factory-installed auxiliary switch (1A/1B), enabling remote monitoring of the breaker's open or closed status. It delivers 10kA interrupting capacity at 240VAC and features reversible line and load lugs for flexible wiring, along with the signature Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOU350-1200 |
| Series | QOU |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 120/240VAC, 48VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 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 | Padlock Attachment, Mounting Feet, Shunt Trip, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs Included, Mounting Hardware, Auxiliary Switch (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
Product FAQs
6 answersWhat does the -1200 suffix indicate on the QOU350-1200 catalog number?
The -1200 suffix designates that this breaker comes with a factory-installed auxiliary switch (1 normally open contact) for remote status monitoring.
Can the Square D QOU350-1200 be reverse-fed?
Yes. QOU miniature circuit breakers are UL Listed and CSA certified for reverse connection, meaning they can be reverse-fed without restrictive line or load markings.
How do you mount the QOU350-1200 in a panel or enclosure?
This unit-mount breaker features a flexible design that can be flush-mounted, surface-mounted, or snapped onto a standard DIN rail system.
How can I tell if the QOU350-1200 has tripped?
This breaker features the Square D Visi-Trip indicator, which displays a highly visible red flag in the window when the breaker trips due to an overload or short circuit.
Are the line and load lugs included with the QOU350-1200?
Yes, this breaker comes standard with slotted box lugs on both the line and load sides. They accept 14 AWG to 2 AWG aluminum or copper wire.
Is the QOU350-1200 suitable for DC electrical systems?
Yes, QOU miniature circuit breakers are designed for overcurrent protection and switching on both AC and DC systems. This specific model supports up to 48V DC.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
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.
Search
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!