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Square D QO250-1021 QO2501021 - 50A 2 Pole Miniature Circuit Breaker
- 50A
- 2 Pole
- Plug-On
Square D
QO250-1021
QO2501021 - 50A 2 Pole Miniature Circuit Breaker
Brand
Square D
SKU
QO250-1021
Quantity
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Square D QO2501021 - 50A 2 Pole Miniature Circuit Breaker
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Description
Featuring a factory-installed shunt trip mechanism, this 50-amp two-pole breaker enables remote tripping capabilities for emergency shutdowns or automated control systems. It installs into standard Square D QO load centers, as well as commercial NQ and NQOD panelboards. The integrated Visi-Trip indicator ensures maintenance personnel can easily spot a tripped condition, while the HACR rating supports HVAC applications.Specifications
| Brand | Square D |
|---|---|
| Part Number | QO2501021 |
| Series | QO |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120VAC, 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC, 10kA @ 120/240VAC, 5kA @ 48VDC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | QO Load Centers, NQ Panelboards, NQOD Panelboards |
| Wire Gauge | 8-2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip |
| Standards | CSA C22.2 No. 5, UL 489, HACR, NEMA AB 1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, Common Trip, RoHS Compliant |
Product FAQs
8 answersWhat does the 1021 suffix indicate on the QO2501021?
The 1021 suffix designates a factory-installed 120/240VAC shunt trip accessory. This allows the breaker to be tripped remotely via an external voltage signal, which is commonly used for emergency power-off (EPO) circuits or automated control systems.
How many panel spaces does the QO250-1021 require?
Although it is a 2-pole breaker, it requires 3 panel spaces because the factory-installed shunt trip mechanism occupies an additional pole space in the load center.
Which panelboards and load centers are compatible with this breaker?
This plug-on breaker is compatible with Square D QO load centers, NQ panelboards, NQOD panelboards, and OEM interior or speed switchboard distribution panels.
Can the QO250-1021 be used in direct current (DC) circuits?
Yes, in addition to its standard AC ratings, this thermal-magnetic breaker is rated for use in DC applications up to 48VDC, providing a 5kA interrupting capacity.
What wire sizes and materials are supported by the terminals?
The box lugs on this breaker accept 8 AWG to 2 AWG wire and are rated for both aluminum and copper conductors.
Does this breaker include ground fault or arc fault protection?
No. This is a standard thermal-magnetic breaker with long-time and instantaneous (LI) trip functions. It does not provide GFCI, AFCI, or dual-function protection.
Is this breaker suitable for HVAC applications?
Yes, the QO2501021 is HACR rated, making it suitable for group motor applications found in heating, air conditioning, and refrigeration equipment.
Does this breaker feature a visual trip indicator?
Yes, it includes the Square D Visi-Trip indicator. When the breaker trips, the handle moves to a center position and a red indicator appears in a window on the breaker case, making it easy to identify the tripped circuit.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 285 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 6/13/26
Customers say these circuit breakers arrive quickly and work as described. Fast shipping and competitive pricing are frequently mentioned, with many noting same-day or next-day delivery. Users appreciate the wide inventory, particularly for hard-to-find older-style models unavailable locally. The products function reliably and arrive in good condition. Most customers report straightforward ordering and positive interactions. However, some experienced delivery delays or received incorrect items requiring reordering. A few noted concerns about condition upon arrival or customer service responsiveness.
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Rating
285 reviews
- GCGerard C.Verified BuyerReviewingSquare D QO130GFI - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/21/26Great !
I could not find the breaker in hardwood stores. Superbreakers took car of it in a week.
- RHRoy H.Verified BuyerReviewingSquare D QO280 - 80A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/17/26Square D QO280 - 80A 2 Pole Miniature Circuit Breaker
Exactly as described
- KWKevin W.Verified BuyerReviewingSquare D QO120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/15/26Great Price
Brand spanking new!
- CEchristopher e.Verified BuyerReviewingSquare D QO115PDF - 15A Dual Function Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/11/26My breakers
Had a hard time locating these breakers locally, when I did find 1 they wanted to charge me triple what superbreakers charged. Items delivered exactly when they said they would, were exactly what I ordered. Appreciated the ease of ordering, definitely my go to from this point on
- JCJerry C.Verified BuyerReviewingSquare D QO250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/8/26Great quality
No issues