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Square D QOB3100 Miniature Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Square D
QOB3100
Miniature Circuit Breaker
Brand
Square D
SKU
QOB3100
Quantity
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Square D QOB3100 - 100A 3 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Square D QOB3100 - 100A 3 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | QOB3100 |
| Series | QOB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 120/240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 120/240VAC |
| Frame Type | QO |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | NQ Panelboards, NQOD Panelboards |
| Wire Gauge | 4 AWG - 2/0 AWG (Al/Cu) |
| Max Wire | 2/0 AWG |
| Min Wire | 4 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 | CSA C22.2 No. 5, UL 489, HACR |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Mercury Free, RoHS Compliant |
Sold out
Quantity
Square D QOB3100 - 100A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | QOB3100-R |
| Series | QOB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 120/240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 120/240VAC |
| Frame Type | QO |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | NQ Panelboards, NQOD Panelboards |
| Wire Gauge | 4 AWG - 2/0 AWG (Al/Cu) |
| Max Wire | 2/0 AWG |
| Min Wire | 4 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 | CSA C22.2 No. 5, UL 489, HACR |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Mercury Free, RoHS Compliant |
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Description
Part of the QO family by Square D, this 3-pole, 100A miniature circuit breaker provides dependable thermal-magnetic protection for commercial and industrial applications. It handles 240VAC systems with a 10kAIC interrupting capacity. The bolt-on design installs securely into NQ and NQOD panelboards. It accepts 4 AWG to 2/0 AWG aluminum or copper wiring via standard box lug terminals. Equipped with a Visi-Trip indicator, this HACR-rated breaker makes it easy to spot a tripped circuit.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB3100 |
| Series | QOB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 120/240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 120/240VAC |
| Frame Type | QO |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | NQ Panelboards, NQOD Panelboards |
| Wire Gauge | 4 AWG - 2/0 AWG (Al/Cu) |
| Max Wire | 2/0 AWG |
| Min Wire | 4 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 | CSA C22.2 No. 5, UL 489, HACR |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Mercury Free, RoHS Compliant |
Product FAQs
7 answersHow many panel spaces does the QOB3100 require?
As a standard QO format 3-pole breaker, it requires three 3/4-inch spaces in your panelboard.
Will the QOB3100 fit into a standard QO load center?
No. The QOB3100 features a bolt-on connection intended exclusively for Square D NQ and NQOD panelboards. Standard QO load centers require plug-on connections.
What type of wire connections does this breaker use?
This breaker is equipped with standard box lugs that safely accept 4 AWG to 2/0 AWG copper or aluminum conductors.
Is the QOB3100 HACR rated?
Yes, this breaker is HACR rated, making it suitable for group motor applications such as heating, air conditioning, and refrigeration equipment.
Can the QOB3100 be used in DC voltage systems?
Yes, in addition to its standard AC voltage capacities, this thermal-magnetic breaker is rated for use in 48VDC applications.
What is the plug-on equivalent for this circuit breaker?
The direct plug-on equivalent for use in standard Square D QO load centers is catalog number QO3100.
Is there a version of the QOB3100 with a higher interrupting capacity?
Yes. If your commercial or industrial application requires a higher fault current rating, you can specify the QOB3100VH, which provides a 22kAIC rating at 240VAC.
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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