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Square D QOB330VH-1021 QOB330VH1021 - 30A 3 Pole Miniature Circuit Breaker
- 30A
- 3 Pole
- Bolt-On
Square D
QOB330VH-1021
QOB330VH1021 - 30A 3 Pole Miniature Circuit Breaker
Brand
Square D
SKU
QOB330VH-1021
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Square D QOB330VH1021 - 30A 3 Pole Miniature Circuit Breaker
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Description
Built for commercial environments, the Square D QOB330VH-1021 is a 3-pole, 30A breaker featuring a factory-installed shunt trip for remote shutdown capabilities. It installs securely into Square D NQ and NQOD panelboards. The bolt-on design ensures a rigid connection that withstands vibration in demanding distribution systems. Delivering a 22 kAIC rating at 120/240VAC, it provides robust protection while the Visi-Trip indicator offers a clear visual cue when tripped to simplify troubleshooting.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB330VH-1021 |
| Series | QOB |
| Amperage | 30A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 240VAC, 120/240VAC |
| Phase | 3 |
| AIC Rating | 22kA @ 120VAC, 22kA @ 240VAC, 22kA @ 120/240VAC |
| Terminal Type | Pressure Plate |
|---|---|
| For Use With | NQ Panelboards, NQOD Panelboards |
| Wire Gauge | 14-8 AWG (Al/Cu) |
| Max Wire | 8 AWG |
| Min Wire | 14 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, UL 489, HACR |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
6 answersWhat does the -1021 suffix indicate on the QOB330VH1021?
The -1021 suffix designates that this breaker includes a factory-installed shunt trip accessory. This allows the breaker to be tripped remotely using a 120V to 240V AC control signal.
How many panel spaces does the QOB330VH-1021 require?
This three-pole breaker requires four panel spaces. The factory-installed shunt trip accessory occupies one additional pole space in the panelboard alongside the breaker itself.
How is the shunt trip wired on the QOB330VH-1021?
The shunt trip accessory features two dedicated wire leads. One lead connects to the neutral bus, and the other connects to the normally open (NO) contact of your remote pilot device, such as an emergency stop button or fire suppression system switch.
Can I apply continuous voltage to the shunt trip coil on this breaker?
No. The shunt trip coil is designed for momentary voltage only. Applying continuous control voltage will burn out the coil. Ensure your control circuit removes power immediately after the breaker trips.
What does the VH stand for in the QOB330VH-1021 part number?
The VH indicates a Very High interrupting rating. It signifies that the breaker has a 22 kA interrupting capacity, compared to the 10 kA rating found on standard QOB breakers.
How can I tell if the QOB330VH-1021 has tripped due to a fault or shunt trip signal?
This breaker features a Visi-Trip indicator. When it trips, the handle moves to a center position and a red indicator appears in the window on the breaker case, distinguishing it from a breaker that was manually turned off.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 206 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
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.