Square D QOB250VH1021 Miniature Circuit Breaker
- 50A
- 2 Pole
- Bolt-On
Quantity
Square D QOB250VH1021 - 50A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Delivering 22kAIC of fault protection, this 50-amp thermal-magnetic device is built for demanding commercial and industrial environments. The factory-installed shunt trip allows for remote tripping capabilities, enhancing system safety and control. Designed for seamless integration, it bolts securely into Square D NQ and NQOD panelboards. The bolt-on mounting style ensures a robust connection that withstands vibration and thermal cycling in heavy-duty applications.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 |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | NQ Panelboards, NQOD Panelboards |
| Wire Gauge | 8 AWG - 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 | Padlock Attachment |
|---|---|
| Accessories | Shunt Trip |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, High Interrupting Capacity |
Product FAQs
6 answersWhat does the "1021" suffix mean on the QOB250VH1021 circuit breaker?
The 1021 suffix indicates that this breaker includes a factory-installed 120/208/240V AC shunt trip accessory. This allows the breaker to be tripped remotely from a separate control circuit.
How many panel spaces does the QOB250VH1021 require?
This 2-pole breaker requires three pole spaces in the panelboard because the factory-installed shunt trip accessory occupies one additional space.
Can I install the QOB250VH1021 in a standard QO residential load center?
No. This is a bolt-on circuit breaker designed specifically for NQ and NQOD panelboards. Standard QO load centers require plug-on breakers.
What is the control voltage for the shunt trip on this breaker?
The factory-installed shunt trip operates on a 120V, 208V, or 240V AC control circuit.
Does the QOB250VH1021 feature a tripped indicator?
Yes, it includes Square D's standard Visi-Trip indicator. When the breaker trips, whether from an overcurrent or via the remote shunt trip, the handle moves to a center position and a red indicator appears in the breaker window.
Does this 2-pole breaker have a common trip mechanism?
Yes, it features a common trip mechanism. An overcurrent on either pole will cause both poles to open simultaneously, ensuring safe disconnection of the circuit.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 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