Eaton / Westinghouse FB3100PF Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
FB3100PF
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
FB3100PF
Quantity
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Eaton / Westinghouse FB3100PF - 100A 3 Pole Molded Case Circuit Breaker
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Description
Providing long-time and instantaneous trip functions, this 100-amp legacy breaker safeguards three-phase circuits. It incorporates AB De-Ion technology to extinguish electrical arcs. Facility managers rely on this F-frame model to maintain Westinghouse CDP and Pow-R-Line systems. This exact match avoids adapter kits necessary when transitioning to the FDB3100. The assembly features factory-calibrated sensors for 40C ambient environments, alongside specialized line-side pressure fingers.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | FB3100PF |
| Series | FB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | FB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Westinghouse Panelboards (CDP, Pow-R-Line) |
| Wire Gauge | 14 AWG - 1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 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 |
|---|---|
| Accessories | Load Side Lugs Included, Line Side Panel Connectors |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, 40C Ambient Calibration, AB De-Ion Arc Extinction |
Product FAQs
8 answersWhat panelboards are compatible with the FB3100PF circuit breaker?
The FB3100PF is designed for use in legacy Westinghouse and Eaton Cutler-Hammer CDP and Pow-R-Line panelboards.
What hardware is required to mount the FB3100PF in a CDP panelboard?
Installing this bolt-on FB frame breaker into a Westinghouse CDP panelboard requires specific bus connection hardware or a retrofit kit, such as the FB1K twin-mount kit, depending on your chassis configuration.
Is the Westinghouse FB3100PF still actively manufactured?
The original FB frame series is a legacy product. Eaton has replaced these obsolete breakers with the current Series C F-frame lineup, which includes the FDB and FD series.
Can I use a modern Series C breaker to replace the FB3100PF?
Yes, Eaton's current Series C F-frame breakers, such as the FDB3100, serve as direct replacements for the obsolete FB frame series. You must verify that the replacement matches your existing panel hardware and required interrupting ratings.
How does the interrupting rating of the FB3100PF change across different voltages?
The breaker provides 18kAIC at 240VAC, drops to 14kAIC at 480VAC and 600VAC, and is rated for 10kAIC when used in 250VDC applications.
What wire sizes and materials are accepted by the FB3100PF terminals?
The factory-installed lugs accept both copper and aluminum conductors ranging from 14 AWG to 1/0 AWG. Applying a suitable joint compound is recommended when using aluminum wire to prevent terminal overheating.
What type of protection does the FB3100PF trip unit provide?
It utilizes a fixed thermal-magnetic trip unit with long-time and instantaneous (LI) functions. The thermal element protects against sustained overloads, while the magnetic element clears short circuits.
Are FB frame breakers physically interchangeable with modern F-frame breakers?
Yes, the legacy FB frame shares the same physical dimensions and bolt patterns as the modern Eaton Series C F-frame breakers, allowing them to fit into the same panelboard spaces.
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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.