Square D QOB3100VH-1021 QOB3100VH1021 - 100A 3 Pole Miniature Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Quantity
Square D QOB3100VH1021 - 100A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Part of the QO series, the QOB3100VH-1021 is a 3-pole, 100A miniature circuit breaker designed for commercial and industrial power distribution. It features a factory-installed 120/208/240 VAC shunt trip, allowing the breaker to be opened from a remote location via a push-button or pilot device. This bolt-on unit installs into Square D NQ and NQOD panelboards. It accepts 4 AWG to 2/0 AWG aluminum or copper wiring. With a 22 kAIC rating at 240V, it provides high-interrupting capacity.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB3100VH-1021 |
| Series | QOB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 120/240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 240VAC, 22kA @ 120/240VAC |
| 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 | Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip |
| Standards | CSA C22.2 No. 5, UL 489, HACR |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
7 answersWhich panelboards are compatible with the QOB3100VH1021 circuit breaker?
This bolt-on circuit breaker is designed for use in Square D NQ and NQOD panelboards. It is not compatible with standard QO load centers, which require plug-on breakers.
What does the -1021 suffix indicate on this Square D breaker?
The 1021 suffix indicates that the breaker includes a factory-installed 120/208/240 VAC shunt trip accessory. This allows the circuit breaker to be tripped remotely using a control voltage signal.
What does the VH designation mean in the QOB3100VH1021 part number?
The VH indicates a high interrupting rating. This breaker provides a 22 kAIC rating at 240V, whereas standard QOB breakers without the VH designation are typically rated for 10 kAIC.
What wire sizes are accepted by the terminals on the QOB3100VH1021?
The box lugs on this 100A breaker accept 4 AWG to 2/0 AWG copper or aluminum conductors.
Does the QOB3100VH1021 feature a Visi-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 the window for quick identification of the faulted circuit.
Is this circuit breaker HACR rated?
Yes, Square D QOB thermal magnetic circuit breakers are HACR rated. They are suitable for multi-motor and combination loads found in heating, air conditioning, and refrigeration equipment.
How does the QOB3100VH1021 mount into the panelboard?
This is a bolt-on breaker. It secures directly to the panelboard bus bar using screws, providing a rigid mechanical and electrical connection required in many commercial and industrial applications.
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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.