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Eaton / Cutler-Hammer FB3150 Molded Case Circuit Breaker
- 150A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
FB3150
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
FB3150
Quantity
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Eaton / Cutler-Hammer FB3150 - 150A 3 Pole Molded Case Circuit Breaker
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Description
A dependable choice for legacy systems, the Eaton FB3150 is a 150A, 3-pole molded case circuit breaker. It incorporates a thermal-magnetic trip unit to safeguard three-phase circuits against overloads. Designed for secure installation, this bolt-on MCCB fits into Westinghouse and Eaton Pow-R-Line panelboards. While the FDB3150 is its modern equivalent, this unit remains essential for maintaining older infrastructure.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FB3150-R |
| Series | FB |
| Amperage | 150A |
| 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 / Eaton Pow-R-Line 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 | Common Trip |
Product FAQs
7 answersWhat panelboards are compatible with the FB3150 circuit breaker?
This bolt-on molded case circuit breaker is designed to fit legacy Westinghouse and modern Eaton Pow-R-Line panelboards, switchboards, and motor control centers.
Is the Eaton FB3150 the exact same breaker as the Westinghouse FB3150?
Yes. Eaton acquired the Westinghouse distribution equipment division. The Eaton and Cutler-Hammer FB3150 models are direct replacements for the original Westinghouse FB3150.
What is the modern Series C equivalent for the legacy FB3150?
The modern Eaton Series C F-frame equivalents are the FDB3150 and FD3150. These are frequently used to replace aging FB3150 breakers while maintaining original panel certifications.
Can the FB3150 be used in reverse feed applications?
Yes. This thermal-magnetic molded case circuit breaker does not have line and load restrictions, allowing it to be safely reverse fed.
How is the FB3150 installed into a panelboard?
The FB3150 is a bolt-on breaker. It must be bolted directly to the chassis busbars of a compatible panelboard or switchboard, rather than clipping onto a DIN rail or plugging in.
What protection does the LI trip function provide on the FB3150?
The LI designation stands for Long-Time and Instantaneous trip functions. This fixed thermal-magnetic trip unit provides standard protection against both sustained overloads and sudden short circuits.
Do the standard lugs on the FB3150 support aluminum conductors?
Yes, the factory-installed lugs are dual-rated for both copper and aluminum (Cu/Al) wire, accepting conductors from 4 AWG up to 4/0 AWG.
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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.