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Eaton / Cutler-Hammer FB3100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
FB3100
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
FB3100
Quantity
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Eaton / Cutler-Hammer FB3100 - 100A 3 Pole Molded Case Circuit Breaker
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Description
Operating as a critical safety component, this 100-amp molded case circuit breaker safeguards commercial wiring against overloads and short circuits. The three-pole unit relies on fixed thermal and magnetic elements to maintain consistent electrical protection. Installation requires bolting the breaker into compatible Westinghouse or Eaton Pow-R-Line enclosures. It acts as an exact functional cross-reference for FDB3100 breakers. Capable of interrupting 14kA at 480VAC, it meets UL 489 standards.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FB3100-R |
| 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 |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse / Eaton Pow-R-Line Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 14-1/0 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, 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
6 answersWhich panelboards are compatible with the FB3100 circuit breaker?
The FB3100 is designed for bolt-on installation in compatible Westinghouse and Eaton Pow-R-Line panelboards, switchboards, and motor control centers that accept F-frame breakers.
Is the Eaton FB3100 a direct replacement for legacy Westinghouse FB3100 breakers?
Yes. Eaton acquired the Westinghouse distribution equipment business, making the Eaton or Cutler-Hammer FB3100 an exact-match replacement for original Westinghouse FB3100 breakers.
Can the FB3100 be used as a functional cross-reference for the FDB3100?
Yes, the FB3100 serves as an exact functional cross-reference for FDB3100 breakers. Both are 100A, 3-pole, F-frame molded case circuit breakers that fit the same panelboard enclosures.
Can the FB3100 be used in direct current (DC) applications?
Yes, the FB3100 is rated for up to 250VDC with a 10kA interrupting capacity. When installing in DC systems, the poles must be wired in series according to Eaton F-frame DC wiring guidelines to ensure proper arc interruption.
How does the trip mechanism function on the FB3100?
The FB3100 utilizes a non-interchangeable thermal-magnetic trip unit. The fixed thermal element provides long-time protection against continuous overloads, while the fixed magnetic element delivers instantaneous protection against short circuits.
Are connector kits required to install the FB3100 in Eaton Pow-R-Line panelboards?
Yes, depending on the panelboard type. For example, installing a 3-pole F-frame breaker like the FB3100 in a PRL3A panel requires a KPRL3AFD3 connector kit, while a PRL4 panel requires a KPRL4FD kit. Always verify the specific kit required for your panelboard model.
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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.