Square D QOB250VH-1021 QOB250VH1021 - 50A 2 Pole Miniature Circuit Breaker
- 50A
- 2 Pole
- Bolt-On
Quantity
Square D QOB250VH1021 - 50A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Built for applications requiring remote disconnect capabilities, this 50-amp breaker includes a 120/208/240VAC shunt trip accessory. The two-pole bolt-on unit installs into Square D NQ and NQOD panelboards, providing a secure connection for commercial and industrial power distribution. With a 22kAIC rating, it handles higher fault currents while utilizing thermal-magnetic trip technology. The signature Visi-Trip red indicator helps maintenance personnel quickly locate tripped circuits.Specifications
| Brand | Square D |
|---|---|
| Series | QOB |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 240VAC, 22kA @ 120/240VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Square D NQ Panelboards, Square D NQOD Panelboards |
| Wire Gauge | 8-2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 8 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 (120/208/240VAC) |
| 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
6 answersWhat does the -1021 suffix mean on the QOB250VH-1021?
The -1021 suffix indicates that this circuit breaker includes a factory-installed 120/208/240V AC shunt trip accessory. This allows the breaker to be tripped remotely by applying a voltage signal to the shunt trip coil.
Which panelboards are compatible with the QOB250VH-1021?
This bolt-on circuit 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 indicate in the QOB250VH-1021 catalog number?
The VH indicates a high interrupting rating. While standard QOB breakers are typically rated at 10kAIC, this VH version provides a 22kAIC interrupting rating at 120/240V AC for systems with higher available fault currents.
How is the shunt trip wired on the QOB250VH-1021?
The factory-installed shunt trip includes its own wiring leads that exit the breaker housing. Applying a 120V to 240V AC signal to these leads energizes the internal coil, mechanically tripping the breaker for emergency stop or control system integration.
Does the QOB250VH-1021 feature a Visi-Trip indicator?
Yes, this breaker includes the Square D Visi-Trip visual indicator. When the breaker trips due to an overcurrent condition or a remote shunt trip signal, a red flag appears in the indicator window to help quickly identify the tripped unit in a crowded panelboard.
Is the QOB250VH-1021 suitable for HVAC equipment?
Yes, this breaker is HACR rated, making it suitable for protecting multi-motor and combination-load heating, air conditioning, and refrigeration equipment.
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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.