Square D QOB220VH1021 Miniature Circuit Breaker
- 20A
- 2 Pole
- Bolt-On
Quantity
Square D QOB220VH1021 - 20A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Providing advanced control for commercial facilities, the Square D QOB220VH1021 is a 2-pole, 20-amp miniature circuit breaker. It is equipped with a factory-installed shunt trip accessory, which permits the breaker to be tripped remotely via an external voltage signal. This unit utilizes a dependable bolt-on connection to ensure stability. It is engineered to fit seamlessly into Square D NQ and NQOD panelboards.Specifications
| Brand | Square D |
|---|---|
| Series | QOB |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 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, Handle Padlock Attachment |
|---|---|
| Accessories | Shunt Trip |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated |
Product FAQs
7 answersWhat panelboards accept the QOB220VH1021 circuit breaker?
This bolt-on breaker is specifically designed for installation in Square D NQ and NQOD series panelboards. It is not compatible with standard QO residential load centers, which require plug-on breakers.
What does the 1021 suffix indicate on the QOB220VH1021?
The 1021 suffix denotes a factory-installed shunt trip accessory rated for 120/208/240 VAC. This allows the breaker to be tripped remotely via an external voltage signal, making it suitable for emergency shutdown or automated control circuits.
How does the VH designation affect the interrupting rating of this breaker?
The VH suffix indicates a high-interrupting rating of 22kAIC at 120/240VAC. This is significantly higher than standard QOB breakers, which typically feature a 10kAIC rating, allowing it to be used in systems with higher available fault currents.
How is the shunt trip wired on the QOB220VH1021?
The factory-installed shunt trip features its own set of control wire terminals. An external 120 VAC to 240 VAC control signal must be routed to these terminals. When energized, the coil mechanically trips the breaker mechanism.
How many panel spaces does the QOB220VH1021 require?
Although it is a 2-pole circuit breaker, the factory-installed shunt trip accessory requires an additional pole space. Therefore, this breaker takes up a total of three pole spaces (2.25 inches) in the panelboard.
What is the advantage of the bolt-on connection for this breaker?
The bolt-on mounting style secures the breaker directly to the panelboard bus bar with a screw. This provides a highly reliable, vibration-resistant connection preferred in commercial and industrial applications over standard plug-on designs.
Does the QOB220VH1021 provide personnel protection against ground faults?
No. This is a standard thermal-magnetic circuit breaker equipped with a shunt trip. It provides overload and short-circuit protection but does not include Ground Fault Circuit Interrupter (GFCI) or Arc Fault Circuit Interrupter (AFCI) capabilities.
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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.