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Square D QO225-1021 QO2251021 - 25A 2 Pole Miniature Circuit Breaker
- 25A
- 2 Pole
- Plug-On
Square D
QO225-1021
QO2251021 - 25A 2 Pole Miniature Circuit Breaker
Brand
Square D
SKU
QO225-1021
Quantity
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Square D QO2251021 - 25A 2 Pole Miniature Circuit Breaker
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Description
Built for commercial and industrial control systems, this 25-amp, two-pole breaker includes a factory-installed shunt trip for remote power interruption. The plug-on design mounts securely into Square D QO load centers and NQ panelboards, accepting 14-8 AWG copper or aluminum wiring. Operating at 120/240V with a 10kAIC rating, it features a trip-free mechanism, quick-make/quick-break action, and the signature Visi-Trip indicator for immediate visual confirmation of a fault.Specifications
| Brand | Square D |
|---|---|
| Part Number | QO2251021 |
| Series | QO |
| Amperage | 25A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120VAC, 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC, 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QO |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | QO Load Centers, NQ Panelboards |
| Wire Gauge | 14-8 AWG (Al/Cu) |
| Max Wire | 8 AWG |
| Min Wire | 14 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 (120/208/240 VAC) |
| Standards | CSA C22.2 No. 5, UL 489, HACR |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, Common Trip, Trip-Free Mechanism, Quick-Make/Quick-Break |
Product FAQs
6 answersWhat does the -1021 suffix mean on this Square D QO breaker?
The -1021 suffix indicates that the breaker includes a factory-installed 120/208/240V AC shunt trip. This allows the breaker to be tripped remotely by applying voltage to the shunt trip coil.
How does the shunt trip function on the QO225-1021 operate?
The factory-installed shunt trip requires an external voltage source of 120V to 240V AC. When power is applied to the shunt trip coil, it mechanically trips the breaker to open the circuit, making it ideal for emergency stop or remote shutdown applications.
What panelboards and load centers are compatible with the QO225-1021?
This plug-on circuit breaker is designed for use in Square D QO load centers and NQ panelboards. It is not compatible with Homeline or I-Line panels.
Is there a bolt-on equivalent for the QO225-1021?
Yes, if your application requires a bolt-on connection for an NQ panelboard, the equivalent Square D part number is QOB2251021.
Does the QO225-1021 feature a Visi-Trip indicator?
Yes, this breaker includes the Square D Visi-Trip indicator. When the breaker trips due to an overcurrent or a remote shunt trip command, the handle moves to a center position and a highly visible red indicator appears in a window on the breaker case.
Is the QO225-1021 HACR rated?
Yes, standard Square D QO circuit breakers are HACR rated, making this breaker suitable for group motor applications found in heating, air conditioning, and refrigeration equipment.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 286 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
286 reviews
- RBRobert B.Verified BuyerReviewingSquare D QO120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/5/26Square D Q0120-20A circuit breaker
This device was delivered on time as advertised and it was in excellent condition. The installation process was simple and straightforward, and the unit worked perfectly when connected to the electric circuit.
I am completely satisfied and will utilize this component resource for my future electrical needs.
- 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