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Eaton / Cutler-Hammer FD3125LS Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Eaton / Cutler-Hammer
FD3125LS
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
FD3125LS
Quantity
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Eaton / Cutler-Hammer FD3125LS - 125A 3 Pole Molded Case Circuit Breaker
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Description
Designed with stainless steel line and load lugs, the Eaton FD3125LS is a 3-pole, 125A molded case circuit breaker built for enhanced durability. The specialized terminals provide superior corrosion resistance, making this Series C breaker ideal for harsh industrial applications. The F-frame unit mounts into compatible Eaton panelboards, switchboards, and motor control centers. For modern system updates, it crosses over to the Power Defense PDG23G0125TFFJ. It provides a 35kAIC rating at 480V.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FD3125LS |
| Series | FD |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton Series C Panelboards, Motor Control Centers, Switchboards |
| 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 |
|---|---|
| Accessories | Stainless Steel Line and Load Lugs |
| Standards | HACR, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Stainless Steel Terminals |
Product FAQs
9 answersWhat is the modern replacement for the Eaton FD3125LS?
The Eaton Power Defense PDG23G0125TFFJ is the direct modern replacement for the legacy FD3125LS. It offers the same 125A, 3-pole configuration and 35kAIC rating at 480VAC.
What does the "LS" suffix indicate on the FD3125LS?
The "LS" suffix indicates that this breaker is equipped with stainless steel line and load lugs. These specialized terminals provide enhanced corrosion resistance for harsh industrial environments.
What wire sizes are compatible with the lugs on the FD3125LS?
The standard stainless steel lugs on this breaker accept 4 AWG to 4/0 AWG copper or aluminum wire.
Which panelboards and enclosures are compatible with the FD3125LS?
This F-frame breaker mounts in Eaton Series C panelboards, motor control centers, and switchboards designed for unit-mount breakers.
Can the trip settings on the FD3125LS be adjusted?
No, this breaker features a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous trip functions are factory set and cannot be field adjusted.
Is the FD3125LS rated for use in DC applications?
Yes, this breaker is rated for up to 250VDC with an interrupting capacity of 10kAIC, making it suitable for specific direct current systems.
Can the FD3125LS be reverse fed?
Yes, all Eaton Series C F-frame circuit breakers, including the FD3125LS, are suitable for reverse feed applications.
Is the FD3125LS HACR rated?
Yes, this F-frame circuit breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment.
How is the FD3125LS mounted?
This is a unit-mount, feed-thru circuit breaker. It is designed to be bolted directly to the mounting surface or panel rather than plugging onto a busbar.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 14 reviews.
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Rating
14 reviews
- SGStephen G.Verified BuyerReviewingEaton / Cutler-Hammer FD3175 - 175A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars7/13/26175amp molded case circuit breaker
The breaker we purchased was as advertised. The breaker fit perfectly. We purchased reconditioned breaker and it seems to be working properly, accordingly to the golf course maintenance team that supervises the irrigation system.
Next day shipping came quickly even though the 4th of July was coming.
I wish it came with new installations hardware but that isn’t a deal breaker.
- MBMichael B.Verified BuyerReviewingEaton / Cutler-Hammer FD3040 - 40A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/7/26Worked perfectly
This circuit breaker installed as expected and performed flawlessly.
- DQDavid Q.ReviewingEaton / Cutler-Hammer FD2080 - 80A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/17/23A+ Seller
Breaker came as described and was shipped out fast!
- OCOscar C.ReviewingEaton / Cutler-Hammer FD3175 - 175A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/20/23Great Service
Totally recommended
- MLMichael L.ReviewingEaton / Cutler-Hammer FD2050 - 50A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/2/22Quick and Easy
They had what we needed and were able to ship it quickly.