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Eaton / Cutler-Hammer FB3125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
FB3125
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
FB3125
Quantity
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Eaton / Cutler-Hammer FB3125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Eaton / Cutler-Hammer FB3125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FB3125-R |
| Series | FB |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse / Cutler-Hammer Pow-R-Line C Panelboards, FDP Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 4 AWG - 4/0 AWG (Cu/Al) |
| Max Wire | 4/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Reverse Feed, Non-Interchangeable Trip |
Quantity
Eaton / Cutler-Hammer FB3125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FB3125-R |
| Series | FB |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse / Cutler-Hammer Pow-R-Line C Panelboards, FDP Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 4 AWG - 4/0 AWG (Cu/Al) |
| Max Wire | 4/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Reverse Feed, Non-Interchangeable Trip |
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Description
Utilizing advanced AB De-Ion arc extinction, this 125A molded case breaker quickly clears faults in commercial electrical systems. It mounts into Westinghouse and Cutler-Hammer Pow-R-Line C panelboards, FDP enclosures, and motor control centers. The three-pole unit supports reverse feed applications and comes equipped with load side lugs for immediate wiring. Facility managers often use this model to replace aging FDB3125 or FD3125 breakers while maintaining original panel certifications.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FB3125-R |
| Series | FB |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse / Cutler-Hammer Pow-R-Line C Panelboards, FDP Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 4 AWG - 4/0 AWG (Cu/Al) |
| Max Wire | 4/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Reverse Feed, Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards accept the FB3125 circuit breaker?
This bolt-on breaker mounts directly into the chassis of Westinghouse and Cutler-Hammer Pow-R-Line C panelboards, FDP panelboards, switchboards, and motor control centers.
Are the load side lugs factory-installed on this breaker?
Yes, standard mechanical lugs are included on the load side. They accommodate 4 AWG to 4/0 AWG copper or aluminum conductors.
Is the FB3125 rated for direct current systems?
Yes, it carries a 250VDC rating with a 10kAIC interrupting capacity, allowing installation in industrial DC control panels and battery backup systems.
Will this replace an older Westinghouse FB3125?
Yes. Eaton manufactures this breaker to the exact physical and electrical specifications of the original Westinghouse and Cutler-Hammer FB3125, maintaining existing panel UL certifications.
Can I adjust the trip curve on the FB3125?
No. This breaker features fixed thermal and fixed magnetic trip elements for both long-time and instantaneous protection, meaning the trip curve cannot be field-adjusted.
What frame size is the FB3125?
It is built on the standard F-Frame chassis, which is a legacy molded case footprint used across multiple generations of Cutler-Hammer and Westinghouse distribution equipment.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
Total 5 star reviews: 2 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
2 reviews
- SDSal D.Verified BuyerReviewingEaton / Cutler-Hammer FB3125 - 125A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/16/26Breakers
Really happy with the breakers and with the quickness they were delivered
- CBChristopher B.ReviewingEaton / Cutler-Hammer FB3015L - 15A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/8/20AWESOME JOB
Quick response and delivery. Exactly what I wanted.