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Square D QOB230EPD GFEP Miniature Circuit Breaker
- 30A
- 2 Pole
- Bolt-On
Square D
QOB230EPD
GFEP Miniature Circuit Breaker
Brand
Square D
SKU
QOB230EPD
Quantity
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Square D QOB230EPD - 30A GFEP Miniature Circuit Breaker
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Description
Built for commercial and industrial applications, the Square D QOB230EPD delivers reliable 30mA equipment ground-fault protection. This two-pole, 30-amp breaker is rated for 10kAIC at 120/240VAC and provides essential defense against low-level ground faults that could damage sensitive machinery. Designed for secure bolt-on installation, it mounts into Square D NQ and NQOD panelboards. The unit accommodates 14-8 AWG wire via pressure plate terminals and includes the Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB230EPD |
| Series | QOB |
| Amperage | 30A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 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 | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed |
| Special Classification | GFEP |
|---|---|
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
| Accessories | None included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, Common Trip |
Product FAQs
8 answersWhat panelboards are compatible with the QOB230EPD circuit breaker?
This bolt-on circuit breaker is designed exclusively for Square D NQ and NQOD series panelboards. It will not fit in standard QO load centers, which require plug-on QO breakers.
What does the EPD suffix indicate on the QOB230EPD?
The EPD suffix designates this as an Equipment Protection Device. It provides a 30mA ground fault trip threshold (Class B) to protect equipment such as heat trace cables or pumps, differing from the 5mA Class A threshold used for personal protection.
How many panel spaces does the QOB230EPD occupy?
This 2-pole breaker requires two standard 0.75-inch spaces in an NQ or NQOD panelboard. The total width of the breaker is 1.5 inches.
Is the QOB230EPD interchangeable with a QO230EPD?
No. Although they share the same electrical specifications, the QOB230EPD features a bolt-on mounting clip for NQ and NQOD panelboards. The QO230EPD is a plug-on variant for standard QO residential load centers.
How is the pigtail neutral connected on this breaker?
The included white pigtail wire must be terminated directly on the panel neutral bus bar. This connection is required to power the internal ground fault detection circuitry.
Does this breaker provide standard thermal-magnetic protection?
Yes. In addition to the 30mA ground fault equipment protection, the QOB230EPD includes standard thermal-magnetic mechanisms for long-time overload and instantaneous short-circuit protection.
Can the QOB230EPD be applied on a 208Y/120VAC system?
Yes. While marked for 120/240VAC, Square D QOB miniature circuit breakers are fully rated and commonly installed in 208Y/120VAC three-phase, four-wire systems.
Can the QOB230EPD be used to meet NEC requirements for personnel GFCI protection?
No. Because this breaker has a 30mA trip threshold for equipment protection, it does not meet the 5mA Class A requirement for personnel protection in wet or damp locations. For personnel protection, a breaker with a GFI suffix is required.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 206 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
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.