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Eaton / Cutler-Hammer FDB2125 Molded Case Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
Eaton / Cutler-Hammer
FDB2125
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
FDB2125
Quantity
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Eaton / Cutler-Hammer FDB2125 - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Quantity
Eaton / Cutler-Hammer FDB2125 - 125A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FDB2125 |
| Series | FDB |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | FD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers, F-Frame Enclosures |
| 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, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Quick-Make/Quick-Break, Trip-Free Mechanism, Non-Interchangeable Trip |
Sold out
Quantity
Eaton / Cutler-Hammer FDB2125 - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FDB2125-R |
| Series | FDB |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | FD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers, F-Frame Enclosures |
| 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, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Quick-Make/Quick-Break, Trip-Free Mechanism, Non-Interchangeable Trip |
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Description
Engineered for commercial and industrial applications, the Eaton FDB2125 is a 2-pole, 125A molded case circuit breaker from the Series C F-Frame family. It features a fixed thermal-magnetic trip unit with long-time and instantaneous (LI) protection functions. This bolt-on breaker mounts into Eaton Series C panelboards, switchboards, and F-Frame enclosures. Rated for 14kAIC at 480VAC, it is HACR rated and replaces legacy FD2125 and HFD2125 models.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FDB2125-R |
| Series | FDB |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | FD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers, F-Frame Enclosures |
| 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, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Quick-Make/Quick-Break, Trip-Free Mechanism, Non-Interchangeable Trip |
Product FAQs
8 answersCan the Eaton FDB2125 replace an older Westinghouse FDB2125?
Yes. Eaton acquired the Westinghouse and Cutler-Hammer molded case circuit breaker lines. The current Eaton FDB2125 is a direct replacement and shares the exact F-Frame footprint as the legacy Westinghouse models.
What is the difference between the FDB2125 and the FD2125 breakers?
The difference is the short circuit interrupting rating. The FDB2125 is a standard interrupting breaker rated at 14kAIC at 480VAC. The FD2125 is the high interrupting version rated at 35kAIC at 480VAC. Both use the same physical Series C F-Frame dimensions.
What enclosures and panelboards are compatible with the FDB2125?
This bolt-on breaker is designed for installation in Eaton Series C panelboards, switchboards, motor control centers, and dedicated F-Frame enclosures. It requires appropriate bolt-on mounting hardware for busbar connection.
Can the FDB2125 be used in direct current (DC) systems?
Yes, this thermal-magnetic breaker is rated for DC applications up to 250VDC, providing a 10kAIC interrupting capacity for direct current circuits.
What wire sizes and materials do the standard lugs accept?
The factory-installed line and load lugs on the FDB2125 accept 4 AWG through 4/0 AWG conductors. The terminals are rated for both copper (Cu) and aluminum (Al) wire.
Can I substitute the FDB2125 for an HFD2125?
While both are 2-pole 125A F-Frame breakers with identical physical dimensions, the FDB2125 has a standard 14kAIC rating at 480VAC. The HFD2125 is rated for 65kAIC. You can only substitute the FDB2125 if the calculated available fault current at the panel is 14kA or less.
What type of protection does the LI trip function provide?
The LI designation indicates a thermal-magnetic trip unit with Long-Time (thermal) and Instantaneous (magnetic) protection. The thermal element protects against sustained overloads, while the magnetic element trips immediately during a short circuit. Both settings are fixed on this model.
Are the trip settings adjustable on the FDB2125?
No. The FDB2125 features a fixed thermal and fixed magnetic trip unit. If you require adjustable trip settings, you will need to upgrade to a breaker with an electronic trip unit.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
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Rating
2 reviews
- BBrentVerified BuyerReviewingEaton / Cutler-Hammer FDB3060 - 60A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Breaker was as expected.
Breaker was clean, you could not tell it was used.
- RFRussell F.Verified BuyerReviewingEaton / Cutler-Hammer FDB3025 - 25A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/24/26Right product, right time
This is what I needed, and I got it in time.