Square D QO120EPD-2100 QO120EPD2100 - 20A GFEP Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Square D
QO120EPD-2100
QO120EPD2100 - 20A GFEP Miniature Circuit Breaker
Brand
Square D
SKU
QO120EPD-2100
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Square D QO120EPD2100 - 20A GFEP Miniature Circuit Breaker
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20A GFEP Miniature Circuit Breaker
Description
Part of the QO series, this 20A miniature circuit breaker delivers 30mA equipment ground fault protection (GFEP) for commercial and industrial applications. It includes a factory-installed alarm switch to signal trip events. Designed for plug-on installation, it mounts into Square D QO load centers, NQ panelboards, and NQOD panelboards. It accepts 14-8 AWG copper or 12-8 AWG aluminum wire. Rated at 10kAIC at 120VAC, this thermal-magnetic breaker features the Visi-Trip indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | QO120EPD-2100 |
| Series | QO |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | QO |
|---|---|
| Terminal Type | Pressure Plate |
| For Use With | QO Load Centers, NQ Panelboards, 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 | Alarm Switch |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Equipment Protection Device (EPD), Alarm Switch (Factory Installed) |
Product FAQs
7 answersWhat does the "-2100" suffix mean on the QO120EPD-2100 breaker?
The -2100 suffix indicates the inclusion of a factory-installed alarm switch rated for 5A at 120VAC. This switch features a normally open contact that actuates only when the breaker trips, allowing it to be wired to an external bell, indicator light, or control circuit.
How many panel spaces does the QO120EPD-2100 require?
Although it is a 1-pole breaker, the factory-installed alarm switch requires an additional pole space. The complete assembly takes up two standard 0.75-inch spaces (1.5 inches total width) in a QO load center or NQ panelboard.
What is the difference between an EPD breaker and a standard GFI breaker?
An EPD (Equipment Protection Device) breaker provides Class B ground fault protection with a 30 mA trip threshold, designed specifically to protect equipment. A standard GFI breaker provides Class A protection with a 5 mA trip threshold to protect personnel from electrical shock.
What are common applications for a 30 mA EPD circuit breaker?
EPD breakers are used for equipment with naturally higher leakage currents where a standard 5 mA GFCI would cause nuisance tripping. Common applications include heat trace cables, snow melting systems, and well pumps.
How is the neutral connection wired on this GFEP breaker?
The QO120EPD-2100 uses a pigtail neutral. The coiled white wire attached to the breaker must be connected directly to the neutral bus bar in the panel to power the internal ground fault monitoring circuitry.
Does this breaker provide a visual trip indication?
Yes, it includes the Square D Visi-Trip feature. When the breaker trips due to an overcurrent or ground fault, the handle moves to a center position and a bright red indicator appears in a window on the face of the breaker.
Can I install the QO120EPD-2100 in a Square D Homeline panel?
No. QO series breakers are not interchangeable with Homeline panels. The QO120EPD-2100 is designed exclusively for use in Square D QO load centers, NQ panelboards, and NQOD panelboards.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 285 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 6/13/26
Customers say these circuit breakers arrive quickly and work as described. Fast shipping and competitive pricing are frequently mentioned, with many noting same-day or next-day delivery. Users appreciate the wide inventory, particularly for hard-to-find older-style models unavailable locally. The products function reliably and arrive in good condition. Most customers report straightforward ordering and positive interactions. However, some experienced delivery delays or received incorrect items requiring reordering. A few noted concerns about condition upon arrival or customer service responsiveness.
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Rating
285 reviews
- GCGerard C.Verified BuyerReviewingSquare D QO130GFI - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/21/26Great !
I could not find the breaker in hardwood stores. Superbreakers took car of it in a week.
- RHRoy H.Verified BuyerReviewingSquare D QO280 - 80A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/17/26Square D QO280 - 80A 2 Pole Miniature Circuit Breaker
Exactly as described
- KWKevin W.Verified BuyerReviewingSquare D QO120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/15/26Great Price
Brand spanking new!
- CEchristopher e.Verified BuyerReviewingSquare D QO115PDF - 15A Dual Function Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/11/26My breakers
Had a hard time locating these breakers locally, when I did find 1 they wanted to charge me triple what superbreakers charged. Items delivered exactly when they said they would, were exactly what I ordered. Appreciated the ease of ordering, definitely my go to from this point on
- JCJerry C.Verified BuyerReviewingSquare D QO250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/8/26Great quality
No issues