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Square D QOB220EPD GFEP Miniature Circuit Breaker
- 20A
- 2 Pole
- Bolt-On
Square D
QOB220EPD
GFEP Miniature Circuit Breaker
Brand
Square D
SKU
QOB220EPD
Quantity
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Square D QOB220EPD - 20A GFEP Miniature Circuit Breaker
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Description
Designed to safeguard machinery, the Square D QOB220EPD is a 2-pole, 20A equipment protection device. It delivers 30mA Class B ground fault sensing for industrial applications. The bolt-on configuration ensures a stable connection within Square D NQ and NQOD panelboards. Terminals accommodate 14-8 AWG copper or 12-8 AWG aluminum conductors. With a 10kAIC rating at 120/240VAC, this breaker provides reliable overcurrent defense. A built-in Visi-Trip window clearly displays tripped status.Specifications
| Brand | Square D |
|---|---|
| Part Number | QOB220EPD |
| Series | QOB |
| Amperage | 20A |
| 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 | Square D NQ Panelboards, Square D NQOD Panelboards |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed |
| Special Classification | GFEP |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Visi-Trip Indicator |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, Equipment Protection (30mA) |
Product FAQs
6 answersWhat does the EPD designation indicate on the QOB220EPD?
EPD stands for Equipment Protection Device. Unlike standard GFCI breakers that trip at 4 to 6 milliamps for personnel safety, this model features a 30-milliamp ground fault sensitivity (Class B) designed specifically to prevent equipment damage.
What are typical applications for a 30-milliamp equipment protection breaker?
EPD breakers are typically installed on circuits supplying heat tracing cables, water pumps, snow-melting equipment, or industrial machinery. The 30-milliamp threshold protects the equipment from ground faults while permitting minor natural leakage current that would cause a standard 5-milliamp personnel GFCI to nuisance trip.
Can I install this bolt-on breaker in a standard QO load center?
No. While it belongs to the QO family, the QOB frame features a bolt-on connection designed exclusively for Square D NQ and NQOD commercial panelboards. Standard residential QO load centers require plug-on breakers.
How does the pigtail neutral function on this breaker?
The QOB220EPD includes a coiled white pigtail wire that must be routed and secured directly to the panelboard neutral bar. This connection powers the internal electronics required for the ground fault sensing circuitry.
Is the ground fault trip sensitivity adjustable on the QOB220EPD?
No, the thermal-magnetic trip unit and the 30-milliamp equipment protection ground fault sensitivity are fixed and cannot be field-adjusted.
What is the plug-on equivalent to the QOB220EPD?
If you need a plug-on breaker for a standard QO load center instead of a bolt-on panelboard, the equivalent catalog number is QO220EPD.
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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.