Square D QOB330VH1021 Miniature Circuit Breaker
- 30A
- 3 Pole
- Bolt-On
Square D
QOB330VH1021
Miniature Circuit Breaker
Brand
Square D
SKU
QOB330VH1021
Quantity
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Square D QOB330VH1021 - 30A 3 Pole Miniature Circuit Breaker
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Description
Engineered for advanced control, the Square D QOB330VH1021 is a 3-pole, 30A breaker equipped with a factory-installed shunt trip. This functionality enables remote tripping for emergency stop applications. The unit mounts into Square D NQ and NQOD panelboards using a bolt-on connection, ensuring a vibration-resistant fit that maintains excellent electrical continuity. With a 22 kAIC rating at 120/240VAC, it safely clears severe faults and includes a Visi-Trip indicator for rapid identification.Specifications
| Brand | Square D |
|---|---|
| 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 |
| Frame Type | QOB |
|---|---|
| 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 |
|---|---|
| Accessories | Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, UL 489, HACR |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, High Interrupting Capacity |
Product FAQs
6 answersWhat does the 1021 suffix indicate on the QOB330VH1021?
The 1021 suffix means this breaker includes a factory-installed shunt trip accessory for remote tripping. The shunt trip coil operates on a 120VAC to 240VAC control voltage.
Which panelboards accept the QOB330VH1021 circuit breaker?
This bolt-on breaker is designed exclusively for Square D NQ and NQOD panelboards. It cannot be installed in standard QO load centers, which require plug-on connections.
What does the VH designation mean in the QOB330VH1021 part number?
The VH indicates a high interrupting rating of 22 kAIC at 120/240VAC. This provides a higher fault current withstand than standard QOB breakers, which are typically rated at 10 kAIC.
Does this breaker include a tripped status indicator?
Yes, it features the Square D Visi-Trip indicator. When the breaker trips, the handle moves to a center position and a red flag appears in the indicator window to help quickly identify the faulted circuit.
Is the QOB330VH1021 suitable for HVAC equipment?
Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires group motor protection.
How many panel spaces does the QOB330VH1021 require?
This breaker requires 4 pole spaces in the panelboard. The 3-pole circuit breaker occupies 3 spaces, and the factory-installed shunt trip accessory requires 1 additional space.
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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