Square D QOB380VH-1021 QOB380VH1021 - 80A 3 Pole Miniature Circuit Breaker
- 80A
- 3 Pole
- Bolt-On
Quantity
Square D QOB380VH1021 - 80A 3 Pole Miniature Circuit Breaker
New
Quantity
Description
Built for commercial and industrial applications, the QOB380VH-1021 is a 3-pole miniature circuit breaker from Square D's QO family. It features a factory-installed 120/208/240VAC shunt trip for remote tripping capabilities. This bolt-on breaker installs into Square D NQ and NQOD panelboards. It accepts 4 AWG to 2/0 AWG copper or aluminum wiring via standard box lugs. Rated for 22 kAIC at 240VAC, it provides reliable thermal-magnetic protection and includes a Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB380VH-1021 |
| Series | QOB |
| Amperage | 80A |
| 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 (Cu/Al) |
| 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 | Load Side Lugs Included, Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, UL 489, HACR |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
9 answersWhat does the 1021 suffix mean on the QOB380VH-1021?
The 1021 suffix indicates that this breaker includes a factory-installed shunt trip accessory. This allows the breaker to be tripped remotely using a 120/208/240 VAC control signal, which is commonly used for emergency stops or automated control systems.
Can I add a shunt trip to a standard QOB breaker in the field?
No, shunt trips for Square D QO and QOB circuit breakers are factory-installed only and cannot be added in the field. The 1021 suffix on this specific model indicates the shunt trip is already integrated from the factory.
How many panel spaces does the QOB380VH-1021 require?
This assembly requires four pole spaces in your panelboard. The 3-pole breaker occupies three spaces, and the factory-installed shunt trip accessory requires one additional space.
What does the "VH" in the QOB380VH-1021 part number indicate?
The "VH" designates this as a Very High interrupting rating breaker. It provides 22 kAIC at 120/240VAC, which is significantly higher than the 10 kAIC rating of standard QOB breakers, allowing it to be used in systems with higher available fault currents.
Which panelboards are compatible with the QOB380VH-1021?
This bolt-on miniature circuit breaker is specifically designed for installation in Square D NQ and NQOD series panelboards. It is not compatible with standard QO load centers, which require plug-on breakers.
Can I use aluminum wiring with the QOB380VH-1021?
Yes, the box lug terminals on this breaker are dual-rated for both copper and aluminum wiring, accepting sizes from 4 AWG to 2/0 AWG.
Does this breaker feature a Visi-Trip indicator?
Yes, it includes the Square D Visi-Trip visual indicator. When the breaker trips, a highly visible red indicator appears, making it easy to quickly identify the tripped breaker in a crowded panelboard.
Is the QOB380VH-1021 suitable for HVAC applications?
Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires this specific certification.
How does the thermal-magnetic trip mechanism work on this breaker?
The thermal-magnetic mechanism provides dual protection. The thermal component (long-time) responds to gradual overloads by heating a bimetallic strip, while the magnetic component (instantaneous) responds immediately to severe short circuits.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 211 reviews.
- MLMike L.Verified BuyerReviewingSquare D QOB250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/9/26breaker orders
Breaker worked out great
Can not be happier with the quick shipping
- RCRichard C.Verified BuyerReviewingSquare D QOB380 - 80A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/7/26Great price quick turn around
Thank you for getting me the breaker in a timely fashion
- DSDarren S.Verified BuyerReviewingSquare D QOB250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/5/26Airport taxi lighting
After contactor replacement we discovered bad breakers and were able to get replacements from Super Breakers in 2 days. THANK YOU SUPER BREAKERS..
- MRMiguel R.Verified BuyerReviewingSquare D QOB220GFI - 20A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/1/26Excellent
Excellent product and service
- MRMiguel R.Verified BuyerReviewingSquare D QOB230GFI - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/1/26Excellent
Excellent product and service