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Square D QOB325-1021 QOB3251021 - 25A 3 Pole Miniature Circuit Breaker
- 25A
- 3 Pole
- Bolt-On
Square D
QOB325-1021
QOB3251021 - 25A 3 Pole Miniature Circuit Breaker
Brand
Square D
SKU
QOB325-1021
Quantity
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Square D QOB3251021 - 25A 3 Pole Miniature Circuit Breaker
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Description
Built for specialized control applications, the Square D QOB325-1021 is a three-pole, 25-amp miniature circuit breaker featuring a factory-installed 120/208/240VAC shunt trip. This allows facility managers to remotely open the circuit for emergency shutdowns or automated control. Designed for bolt-on installation, it mounts into Square D NQ and NQOD panelboards. The breaker delivers reliable thermal-magnetic protection with a 10kAIC rating at 240V.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB325-1021 |
| Series | QOB |
| Amperage | 25A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 120/240VAC, 48VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 120VAC, 10kA @ 240VAC, 10kA @ 120/240VAC, 5kA @ 48VDC |
| Frame Type | QOB |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | Square D NQ Panelboards, Square D NQOD Panelboards |
| Wire Gauge | 14-8 AWG (Cu/Al) |
| 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 |
|---|---|
| Accessories | Shunt Trip (Factory Installed), Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB 1, HACR |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated |
Product FAQs
8 answersWhich panelboards are compatible with the QOB3251021 circuit breaker?
This bolt-on breaker is designed for use in Square D NQ and NQOD series panelboards.
What does the 1021 suffix indicate on this Square D breaker?
The 1021 suffix indicates that the breaker includes a factory-installed shunt trip designed to operate on 120V, 208V, or 240V AC control voltage.
How many panel spaces does the QOB3251021 require?
It requires four spaces. The three-pole breaker takes three spaces, and the factory-installed shunt trip requires one additional pole space.
What wire sizes are accepted by the shunt trip terminals?
The shunt trip terminals accept two 14-12 AWG copper wires. The hot and neutral control wires can be connected to either terminal.
Can I add a shunt trip to a standard QOB325 breaker in the field?
No, Square D QO and QOB shunt trips must be factory-installed. If you need remote trip capabilities, you must order a breaker with the appropriate suffix, such as the QOB3251021.
Is the QOB3251021 rated for DC applications?
Yes, in addition to its AC ratings, this breaker is rated for a 5kA interrupting capacity at 48V DC.
Is the QOB3251021 suitable for HVAC applications?
Yes, standard QO and QOB circuit breakers are HACR rated, making them suitable for use with 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 case for quick fault identification.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 212 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 3/11/26
Customers say these electrical breakers arrive exactly as ordered and work perfectly for their intended applications. They consistently praise the competitive pricing, which many report is significantly lower than local suppliers. Fast shipping and prompt delivery are frequently highlighted, with many receiving orders within days or even next-day delivery for urgent needs. The breakers arrive well-packaged and in excellent condition. Many reviews emphasize the company's extensive inventory availability, particularly for hard-to-find breakers. One customer experienced difficulty with order cancellation and was charged a restocking fee, which caused dissatisfaction.
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Rating
212 reviews
- SJSheldon J. H.Verified BuyerReviewingSquare D QOB240 - 40A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/12/26Installer
Good price, worked great.
- MLMike L.Verified BuyerReviewingSquare D QOB250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/9/26breaker orders
Breaker worked out great
Can not be happier with the quick shipping
- RCRichard C.Verified BuyerReviewingSquare D QOB380 - 80A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/7/26Great price quick turn around
Thank you for getting me the breaker in a timely fashion
- DSDarren S.Verified BuyerReviewingSquare D QOB250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/5/26Airport taxi lighting
After contactor replacement we discovered bad breakers and were able to get replacements from Super Breakers in 2 days. THANK YOU SUPER BREAKERS..
- MRMiguel R.Verified BuyerReviewingSquare D QOB220GFI - 20A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/1/26Excellent
Excellent product and service