Square D QOB3100VH1021 Miniature Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Quantity
Square D QOB3100VH1021 - 100A 3 Pole Miniature Circuit Breaker
New
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Description
Built for commercial and industrial environments, this 100A, 3-pole breaker includes a built-in 120/240V shunt trip accessory. This allows facility managers or automated systems to remotely open the circuit for safety or control purposes. The QOB3100VH1021 utilizes a bolt-on connection for secure installation into Square D NQ and NQOD panelboards. Rated at 22 kAIC for 240V systems, this high-interrupting (VH) breaker features quick-make/quick-break action and a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Series | QOB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 120/240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 120VAC, 22kA @ 240VAC, 22kA @ 120/240VAC |
| Frame Type | QOB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Square D NQ Panelboards, Square D 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 | Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip (Factory Installed), Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, RoHS, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, High Interrupting Capacity |
Product FAQs
7 answersWhat does the "1021" suffix mean on the QOB3100VH1021?
The 1021 suffix indicates that this circuit breaker includes a factory-installed 120/240V AC shunt trip accessory, which allows the breaker to be tripped remotely by an external control signal.
How many panel spaces does the QOB3100VH1021 require?
This 3-pole circuit breaker requires a total of four panel spaces for installation. The breaker itself occupies three spaces, and the factory-installed shunt trip accessory requires one additional space.
Which panelboards are compatible with this bolt-on circuit breaker?
The QOB3100VH1021 is designed exclusively for bolt-on installation in Square D NQ and NQOD series panelboards. It is not compatible with standard QO load centers, which require plug-on breakers.
What does the "VH" designation in the part number indicate?
The "VH" signifies that this is a high-interrupting circuit breaker. It provides a 22kAIC rating at 120/240V AC, offering greater fault protection than standard 10kAIC QO or QOB breakers.
Does this breaker include a visual trip indicator?
Yes, it features the signature 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 rapid fault detection.
Is the QOB3100VH1021 rated for use with HVAC equipment?
Yes, this circuit breaker is HACR rated, meaning it has been tested and certified for safe use with heating, air conditioning, and refrigeration equipment.
Can I use the QOB3100VH1021 to replace a standard QOB3100?
While both are 100A, 3-pole bolt-on breakers, the QOB3100VH1021 requires four panel spaces instead of three due to the integrated shunt trip. It also features a higher 22kAIC interrupting rating. It can replace a QOB3100 only if your panel has the required extra space and your control scheme utilizes the shunt trip.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 206 reviews.
- KHKristopher H.Verified BuyerReviewingSquare D QOB120GFI - 20A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/28/26Great Price!
Great price. Fast delivery. My local electric distributor wanted double for the same breaker, so it was a no brainer to order this one. Ordered another one since with the same great service.
- 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.