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Square D QOB2351021 Miniature Circuit Breaker
- 35A
- 2 Pole
- Bolt-On
Square D
QOB2351021
Miniature Circuit Breaker
Brand
Square D
SKU
QOB2351021
Quantity
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Square D QOB2351021 - 35A 2 Pole Miniature Circuit Breaker
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Description
Built for commercial and industrial control systems, the QOB2351021 includes a factory-installed shunt trip mechanism operating at 120/208/240VAC for remote shutdown applications. This 2-pole, 35A miniature circuit breaker utilizes a bolt-on mounting style for secure installation in Square D NQ and NQOD panelboards. Delivering a 10kAIC rating at 120/240VAC, it provides dependable thermal-magnetic protection and features a Visi-Trip indicator for immediate visual status.Specifications
| Brand | Square D |
|---|---|
| Series | QOB |
| Amperage | 35A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | QOB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | 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, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
6 answersWhich panelboards are compatible with the QOB2351021 circuit breaker?
This bolt-on breaker is designed exclusively for installation in Square D NQ and NQOD panelboards.
How many panel spaces does the QOB2351021 require?
This breaker requires three panel spaces. The standard 2-pole breaker occupies two spaces, and the factory-installed shunt trip requires one additional space.
What does the 1021 suffix indicate on this QOB breaker?
The 1021 suffix indicates that the breaker is equipped with a factory-installed 120, 208, or 240 VAC shunt trip accessory, which allows the breaker to be tripped remotely.
Can a shunt trip be field-installed on a standard QOB235 breaker?
No. Square D QO and QOB shunt trips must be factory-installed. If your application requires remote tripping, you must order a breaker with the factory-installed accessory, such as the QOB2351021.
What wire sizes are accepted by the shunt trip terminals?
The shunt trip terminals on this breaker accept up to two 14-12 AWG copper (Cu) wires. The hot and neutral control wires can be connected to either terminal.
Does this breaker include a visual trip indicator?
Yes, it features the Square D Visi-Trip indicator. When the breaker trips due to an overcurrent or short circuit, a highly visible red flag appears in the indicator window for quick identification.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 205 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
205 reviews
- BLBOOSTIX L.Verified BuyerReviewingSquare D QOB220 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/17/26QOB220
That's nice breakers!
- PHPaul H.Verified BuyerReviewingSquare D QOB330 - 30A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/5/26Quick shipping and delivery
Shipped and delivered on time for installation at one of our projects. Thank you!
- RMRick M.Verified BuyerReviewingSquare D QOB220 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Project Mgr
Just what I needed.
- DHDoug H.Verified BuyerReviewingSquare D QOB220 - 20A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Square D QOB breakers
As always, our order arrived timely, and accurate. You can’t beat their prices that’s why we have used this company for years.
- RKRyan K.Verified BuyerReviewingSquare D QOB230VH - 30A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/1/26Awesome
Worked great