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Square D QOB135 Miniature Circuit Breaker
- 35A
- 1 Pole
- Bolt-On
Square D
QOB135
Miniature Circuit Breaker
Brand
Square D
SKU
QOB135
Quantity
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Square D QOB135 - 35A 1 Pole Miniature Circuit Breaker
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Description
A dependable choice for commercial electrical distribution, the QOB135 offers 35 amps of thermal-magnetic overcurrent protection. This single-pole miniature circuit breaker utilizes a bolt-on mounting style to provide a secure, vibration-resistant connection. It is fully compatible with Square D NQ and NQOD panelboards. Rated for 10kAIC at 120/240VAC and 5kA at 48VDC, the unit handles standard fault currents while featuring the highly visible Visi-Trip indicator for rapid troubleshooting.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB135 |
| Series | QOB |
| Amperage | 35A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC, 48VDC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC, 5kA @ 48VDC |
| 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Visi-Trip Indicator |
| Standards | HACR, UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated |
Product FAQs
4 answersCan I install the QOB135 in a standard Square D QO load center?
No. The QOB135 features a bolt-on connection designed specifically for NQ and NQOD panelboards. For a standard QO load center, you will need the plug-on equivalent, catalog number QO135.
What is the difference between the QOB135 and the QO135?
Both are 35A, single-pole breakers with identical electrical ratings and thermal-magnetic trip functions. The difference is the mounting style: the QOB135 is a bolt-on breaker for commercial NQ and NQOD panelboards, while the QO135 is a plug-on breaker for residential and commercial QO load centers.
Is the QOB135 suitable for HVAC applications?
Yes, this breaker is HACR rated. It is approved for use with heating, air conditioning, and refrigeration equipment that requires HACR-rated overcurrent protection.
How can I easily identify if the QOB135 has tripped?
This breaker is equipped with Square D's Visi-Trip technology. When a fault or overload causes the breaker to trip, the handle snaps to a center position and a bright red indicator appears, making it easy to spot in a fully populated NQ or NQOD panelboard.
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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