Square D XO250 Miniature Circuit Breaker
- 50A
- 2 Pole
- Plug-On
Quantity
Square D XO250 - 50A 2 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Square D XO250 - 50A 2 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | XO250 |
| Series | XO |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | XO |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Square D XO Load Centers, Cutler-Hammer XO Load Centers |
| Wire Gauge | 8-4 AWG |
| Max Wire | 4 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Standards | UL 489 |
|---|---|
| Approval | UL |
| Temp Rating | 40°C |
| Construction Features | Common Trip |
Quantity
Square D XO250 - 50A 2 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | XO250-R |
| Series | XO |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | XO |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Square D XO Load Centers, Cutler-Hammer XO Load Centers |
| Wire Gauge | 8-4 AWG |
| Max Wire | 4 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Standards | UL 489 |
|---|---|
| Approval | UL |
| Temp Rating | 40°C |
| Construction Features | Common Trip |
Description
Built to support heavy-draw appliances like electric ovens or subpanels, this 50A miniature circuit breaker keeps residential systems operating safely. It serves as a seamless drop-in solution for existing electrical setups. The unit is fully compatible with classic Square D and Cutler-Hammer XO load centers, utilizing a simple plug-on mounting style. Equipped with a fixed thermal-magnetic trip mechanism, it provides standard 10 kAIC short-circuit protection for common 120/240V applications.Specifications
| Brand | Square D |
|---|---|
| Part Number | XO250 |
| Series | XO |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | XO |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Square D XO Load Centers, Cutler-Hammer XO Load Centers |
| Wire Gauge | 8-4 AWG |
| Max Wire | 4 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Standards | UL 489 |
|---|---|
| Approval | UL |
| Temp Rating | 40°C |
| Construction Features | Common Trip |
Product FAQs
7 answersWhat load centers accept the XO250 circuit breaker?
The XO250 is designed specifically for legacy Square D XO and Cutler-Hammer XO load centers. It features a unique physical footprint and will not fit into modern Square D QO, Homeline, or standard Cutler-Hammer BR panels.
Are Square D and Cutler-Hammer XO breakers interchangeable?
Yes. Both Square D and Cutler-Hammer manufactured the XO series to identical physical and electrical specifications. A Cutler-Hammer XO250 can be used as a direct drop-in replacement for a Square D XO250.
Is the XO series still in active production?
No, the XO frame is a legacy product line that has been obsolete for decades. Maintaining an existing XO panel requires sourcing original Square D or Cutler-Hammer XO breakers, as no modern equivalents share this specific plug-on footprint.
What wire gauge is required for the XO250 box lugs?
The terminal lugs accept wire sizes from 8 AWG to 4 AWG. Ensure your conductors are properly sized for a 50-amp load and torqued to the manufacturer specifications during installation.
What does the LI trip function on the XO250 indicate?
The LI designation means the breaker uses a thermal-magnetic trip unit providing Long-Time (L) overload protection and Instantaneous (I) short-circuit protection. The trip settings are fixed and cannot be adjusted in the field.
What is the maximum short-circuit interrupting capacity of the XO250?
The XO250 has a maximum interrupting rating of 10,000 Amps (10kAIC) at 240VAC. It is not suitable for systems with higher available fault currents.
Can I use the XO250 in a 120V single-pole application?
No. The XO250 is a 2-pole breaker designed for 240VAC circuits, such as electric ovens or subpanels. It requires two spaces on the bus bar and must be used for 240V or 120/240V applications.
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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.
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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 5 reviews.
- VSVenetia S.ReviewingSquare D XO120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars5/26/21Square D X0120
Great customer service, this breaker arrived the very next day and was exactly what I ordered!
- JSJoseph S.ReviewingSquare D XO115 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/24/20Refurbished Circuit Breaker works great!
They had it here fast, exactly as described and worked!
- CChristopherReviewingSquare D XO220 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/17/20Great!!
Product was as described and packed very well.
- CChristopherReviewingSquare D XO115 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/23/19Square D xo15
I ordered 3 xo15 breakers from another company that advertised them as new and since they're obsolete breakers they were quit expensive however when i received them only one was new the other two were obviously used, corroded and missing the wire screw. SuperBreakers sent me New Breakers at a much better price. Happy customer
- TBTerry B.ReviewingSquare D XO115 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars11/11/18Online purchase
Everything went great from beginning to end. Breaker came next day and I had electricity again! Not to mention my breaker was an old obsolete model. They had it in stock. Saved me from replacing while breaker box.