Eaton / Cutler-Hammer GFTCB120 GFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Quantity
Eaton / Cutler-Hammer GFTCB120 - 20A GFCI Miniature Circuit Breaker
New
Quantity
Description
Designed for modern electrical safety, this 20-amp single-pole breaker features automated self-test capabilities to ensure continuous ground fault readiness. The unit requires one inch of panel space and fits Eaton BR, Bryant, Challenger, and Westinghouse enclosures. It serves as an upgrade for the discontinued GFCB120, connecting via a standard pigtail neutral. With a 10kAIC rating, the thermal-magnetic mechanism provides robust overload defense alongside its Class A 5mA GFCI functionality.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | GFTCB120 |
| Series | GFTCB |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | BR |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Eaton BR Load Centers, Westinghouse Load Centers, Challenger Load Centers, Bryant Load Centers |
| Wire Gauge | 14-4 AWG |
| Max Wire | 4 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 | GFCI |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Pigtail Neutral |
| Standards | Federal Spec W-C375, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Self-Test |
Product FAQs
6 answersWhat load centers are compatible with the GFTCB120 circuit breaker?
This breaker is designed for use in Eaton Type BR load centers. It is also backward compatible with legacy Westinghouse, Challenger, and Bryant load centers that accept Type BR breakers.
What is the ground fault trip threshold for this breaker?
The GFTCB120 is a Class A GFCI breaker, meaning it is designed to trip when it detects a ground fault current of 5 mA. This provides personnel protection in wet locations like bathrooms, kitchens, and outdoor receptacles.
How do I wire the neutral connection for the GFTCB120?
This breaker features a pigtail neutral. The coiled white pigtail wire must be connected directly to the neutral bus bar in your load center for the ground fault protection to function properly.
Can I install this pigtail breaker in a Plug-On Neutral (PON) load center?
Yes, you can install a pigtail neutral breaker in a PON load center. However, you must manually route and connect the white pigtail wire to the neutral bus bar, as it will not automatically connect to the neutral rail like a PON-specific breaker would.
Does the GFTCB120 replace older Bryant or Westinghouse GFCI breakers?
Yes, the GFTCB120 is the direct replacement for the legacy GFCB120 catalog number previously manufactured under the Bryant, Westinghouse, and Cutler-Hammer brands.
What does the LIG trip function code mean on this breaker?
The LIG code indicates the breaker provides Long-Time (thermal overload), Instantaneous (short-circuit), and Ground Fault protection.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 6 reviews.
- SFScott F.Rated 5 out of 5 stars8/7/22Replacement circuit breaker
Needed to replace an old sub panel circuit breaker that had failed but is no longer available. Superbreaker provided technical support and a breaker that is working perfectly.
- RCRichard C.Rated 5 out of 5 stars2/27/22Rich Cooperider
sorry to say the breaker didn’t fit. Could you send me information on how to return this item. Thank You for your great service. I’ll use your company in the future.
Rich
- CGCruz G.Rated 5 out of 5 stars2/21/22Just what I need and
Just what I need and quick to deliver
- FJFrancine J.Rated 5 out of 5 stars2/21/21Works great
Works great
- JBJames B.Rated 5 out of 5 stars2/4/21Great experience
Extremely easy purchase