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Square D QOB230H Miniature Circuit Breaker
- 30A
- 2 Pole
- Bolt-On
Square D
QOB230H
Miniature Circuit Breaker
Brand
Square D
SKU
QOB230H
Quantity
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Square D QOB230H - 30A 2 Pole Miniature Circuit Breaker
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Description
Providing robust protection for commercial facilities, the Square D QOB230H is a 30A, two-pole breaker defending against overloads and short circuits. The unit installs into Square D NQ and NQOD panelboards. Its bolt-on mounting ensures a stable, vibration-resistant connection to the busbar. Operating at up to 240 VAC with a 10 kAIC rating, this HACR-approved device includes a Visi-Trip indicator to quickly identify tripped status.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB230H |
| Series | QOB |
| Amperage | 30A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 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 | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489, HACR |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, HACR Rated |
Product FAQs
8 answersWhich Square D panelboards are compatible with the QOB230H?
This bolt-on miniature circuit breaker is designed specifically for installation in Square D NQ and NQOD panelboards. It cannot be installed in standard QO load centers, which require plug-on breakers.
How does the bolt-on mounting differ from standard plug-on breakers?
Bolt-on breakers like the QOB230H secure directly to the panelboard busbar using a screw connection. This provides a highly stable, vibration-resistant mechanical and electrical connection typically required in commercial and industrial environments.
What type of terminal connections does this breaker feature?
The QOB230H uses pressure plate terminals that accept 14 AWG to 8 AWG copper or aluminum wiring. Ensure proper torque is applied during installation as specified by the manufacturer to maintain a secure connection.
Does the QOB230H support straight 240V applications?
Yes, this model carries a straight 240VAC rating at 10kAIC. This allows it to be safely applied on 240V systems without a grounded neutral, such as a 3-wire delta configuration, which is not permitted for standard slash-rated 120/240V breakers.
Is the QOB230H rated 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 overcurrent protection standard.
What type of protection does the thermal-magnetic trip unit provide?
The fixed thermal-magnetic mechanism provides dual protection. The thermal component offers a long-time delay to prevent nuisance tripping from temporary overloads, while the magnetic component provides an instantaneous trip response to clear short circuits quickly.
How can I visually identify if the QOB230H has tripped?
This breaker features a Visi-Trip indicator. When the breaker trips due to an overload or short circuit, a highly visible red indicator appears in the window, allowing you to quickly locate the tripped circuit in a crowded panelboard.
Can the QOB230H replace older QOB breakers?
Yes, it serves as a direct replacement for older 30A, 2-pole QOB breakers in NQ and NQOD panelboards, provided the 10kAIC rating and straight 240V rating meet the fault current and voltage requirements of your specific installation.
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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