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Eaton / Cutler-Hammer FDC3125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
FDC3125
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
FDC3125
Quantity
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Eaton / Cutler-Hammer FDC3125 - 125A 3 Pole Molded Case Circuit Breaker
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Description
Part of the Series C family, this 125-amp, three-pole molded case circuit breaker is built for demanding commercial and industrial environments. It installs into Eaton Pow-R-Line C panelboards, switchboards, and motor control centers using a secure bolt-on connection. Featuring a high interrupting capacity of 200kA at 240VAC and 100kA at 480VAC, the FDC frame delivers reliable current-limiting, thermal-magnetic protection. It is HACR rated and supports reverse feed capabilities.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FDC3125 |
| Series | FDC |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 35kA @ 600VAC, 22kA @ 250VDC |
| Frame Type | FDC |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Pow-R-Line C 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, Padlock Attachment, Motor Operator, Handle Mechanism |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
8 answersWhat panelboards accept the FDC3125 circuit breaker?
This breaker is engineered for bolt-on installation in Eaton Pow-R-Line C panelboards, as well as compatible switchboards and motor control centers.
What does the FDC prefix indicate compared to standard FD breakers?
The FDC designation indicates that this is a current-limiting Series C F-frame breaker. It provides significantly higher short-circuit protection, delivering up to 100kAIC at 480VAC and 200kAIC at 240VAC.
What wire size and conductor material are the terminal lugs rated for?
The standard mechanical lugs on the FDC3125 accept 4 AWG to 4/0 AWG conductors and are dual-rated for either copper (Cu) or aluminum (Al) wire.
Is the FDC3125 a plug-in or bolt-on type breaker?
It is a bolt-on molded case circuit breaker designed to be securely fastened directly to the busbars of a compatible chassis.
Are the thermal or magnetic trip settings adjustable?
No, this breaker is equipped with a standard thermal-magnetic trip unit featuring fixed long-time and fixed instantaneous functions. Neither trip point can be adjusted in the field.
Does the FDC3125 support direct current (DC) applications?
Yes, in addition to its AC ratings, this 3-pole breaker is fully rated for use on DC systems up to 250VDC, where it provides a 22kA interrupting capacity.
Can this replace older Westinghouse or Cutler-Hammer FDC breakers?
Yes. Eaton acquired both the Cutler-Hammer and Westinghouse electrical distribution lines. A modern Eaton FDC3125 serves as an exact, drop-in replacement for legacy breakers carrying the same catalog number.
Can the FDC3125 be used in reverse-feed configurations?
Yes. Eaton Series C F-frame breakers with fixed thermal-magnetic trip units are suitable for reverse-feed use, allowing line and load connections to be inverted safely if needed.
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Reviews
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Customers rate this product 5.0 out of 5 based on 2 reviews.
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2 reviews
- RPRondall P.ReviewingEaton / Cutler-Hammer FDC3030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/24/22Maintenance
Where do I get invoice
- AMAnthony M.ReviewingEaton / Cutler-Hammer FDC3200L - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/4/21Emerald was very helpful
Emerald was very helpful