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Square D QO240GF GFCI Miniature Circuit Breaker
- 40A
- 2 Pole
- Plug-On
Square D
QO240GF
GFCI Miniature Circuit Breaker
Brand
Square D
SKU
QO240GF
Quantity
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Square D QO240GF - 40A GFCI Miniature Circuit Breaker
New
Quantity
Quantity
Square D QO240GF - 40A GFCI Miniature Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | QO240GF |
| Series | QO |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | QO |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | QO Load Centers, NQ Panelboards |
| Wire Gauge | 14-6 AWG (Cu), 12-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| 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 | GFCI |
|---|---|
| Available Options | Padlock Attachment, Auxiliary Switch, Alarm Switch |
| Accessories | Pigtail Neutral |
| Standards | UL 489, UL 943, CSA C22.2 No. 144, HACR |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
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Square D QO240GF - 40A GFCI Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | QO240GF-R |
| Series | QO |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | QO |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | QO Load Centers, NQ Panelboards |
| Wire Gauge | 14-6 AWG (Cu), 12-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| 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 | GFCI |
|---|---|
| Available Options | Padlock Attachment, Auxiliary Switch, Alarm Switch |
| Accessories | Pigtail Neutral |
| Standards | UL 489, UL 943, CSA C22.2 No. 144, HACR |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
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Description
Engineered for demanding electrical systems, the Square D QO240GF supplies 40A of power alongside critical ground-fault protection. It is ideal for residential and commercial applications requiring dedicated GFCI safety. This plug-on breaker mounts into QO load centers and NQ panelboards. As a legacy model superseded by the QO240GFI, it serves as an exact-match replacement. Rated 10 kAIC at 120/240V, it features a pigtail neutral, HACR rating, and the Visi-Trip visual indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | QO240GF |
| Series | QO |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | QO |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | QO Load Centers, NQ Panelboards |
| Wire Gauge | 14-6 AWG (Cu), 12-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| 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 | GFCI |
|---|---|
| Available Options | Padlock Attachment, Auxiliary Switch, Alarm Switch |
| Accessories | Pigtail Neutral |
| Standards | UL 489, UL 943, CSA C22.2 No. 144, HACR |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
6 answersCan I install the QO240GF in a Square D Homeline load center?
No. The QO240GF is designed exclusively for Square D QO load centers and NQ panelboards. Homeline panels have a different bus bar design and require HOM series breakers.
Does this breaker feature a plug-on neutral or a pigtail neutral connection?
The QO240GF is a pigtail neutral circuit breaker. The attached white pigtail wire must be connected directly to the neutral bus bar in your panel to ensure proper ground fault protection.
What is the ground fault trip threshold for this circuit breaker?
This breaker provides Class A GFCI protection, which is designed to trip when a ground fault exceeds 6 milliamperes (mA).
What does the HF rating on this GFCI breaker mean?
The HF (High Frequency) rating indicates the breaker is optimized for equipment utilizing power conversion technology, such as HVAC systems, pool pumps, and EV chargers. This rating helps reduce nuisance tripping in those applications.
Is there a Plug-On Neutral version of this 40A GFCI breaker?
Yes. If your QO load center supports Plug-On Neutral breakers and you prefer to avoid wiring a pigtail, you can use catalog number QO240PGF instead.
Are the QO240GF and QO240GFI the same circuit breaker?
Yes. The QO240GF and QO240GFI are exact match equivalents. Square D often uses the GFI suffix on newer packaging, but both catalog numbers represent the same 40A, 2 pole pigtail neutral GFCI breaker.
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Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
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All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
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