Square D QOU300 Miniature Circuit Breaker
- 60A
- 3 Pole
- Unit Mount
Quantity
Square D QOU300 - 60A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Built for commercial and industrial applications, the Square D QOU300 functions as a 60A non-automatic manual disconnect switch. Rather than providing overcurrent protection, this device safely isolates equipment during maintenance. The unit-mount configuration allows seamless integration into DIN rail systems and OEM panels. Reversible box lugs accept 14-2 AWG wiring for flexible feeding. Rated to withstand 10 kAIC at 240VAC, it includes the signature Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOU300 |
| Series | QOU |
| Amperage | 60A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 48VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 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 |
| 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 | CE, CSA, IEC, RoHS, UL |
| Temp Rating | 40C |
| Construction Features | Non-Automatic (Disconnect), Visual Trip Indicator, Reverse Feed |
Product FAQs
6 answersDoes the Square D QOU300 provide overcurrent protection?
No. The QOU300 is a non-automatic molded case switch designed to function as a manual disconnect. It does not provide thermal-magnetic overcurrent or short-circuit protection, so an appropriate upstream protective device is required.
What mounting options are available for the QOU300?
As a unit-mount device, it can be surface-mounted, flush-mounted, or installed on standard DIN rails using compatible Square D mounting hardware. This versatility makes it ideal for custom enclosures and OEM panels.
What type of wire connections does the QOU300 support?
The switch features slotted box lugs that accept 14 AWG to 2 AWG copper or aluminum conductors. This wide range allows for flexible feed configurations when wiring control panels or OEM equipment.
Is the QOU300 suitable for DC control panels?
Yes, in addition to its 240VAC rating, this disconnect switch is rated for up to 48VDC. It provides a 5kA short-circuit withstand rating for low-voltage DC applications when properly protected upstream.
What is the difference between the QOU300 and the QOU360?
While both are 60A, 3-pole devices in the QOU frame, the QOU360 is a standard thermal-magnetic circuit breaker that trips during overloads or short circuits. The QOU300 is a non-automatic switch used solely as a manual disconnect and will not trip automatically.
Can the QOU300 be used as a disconnect for 3-phase equipment?
Yes, as a 3-pole switch, it is designed to simultaneously disconnect all three ungrounded conductors in a 3-phase system, providing safe isolation for maintenance.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 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!