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Eaton / Cutler-Hammer FDB2100 Molded Case Circuit Breaker

  • 100A
  • 2 Pole
  • Panel Mount
Eaton / Cutler-Hammer FDB2100
Molded Case Circuit Breaker
Brand Eaton / Cutler-Hammer
SKU FDB2100
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  • 100A
  • 2 Pole
  • Panel Mount

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Eaton / Cutler-Hammer FDB2100 - 100A 2 Pole Molded Case Circuit Breaker

Eaton / Cutler-Hammer FDB2100 - 100A 2 Pole Molded Case Circuit Breaker

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$491.40 In Stock

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Description

A robust solution for facility power, the Eaton FDB2100 is a 100A, 2-pole molded case circuit breaker. It utilizes thermal-magnetic technology to provide essential long-time and instantaneous protection. Featuring load side lugs, this F-Frame device is optimized for panel mounting in Eaton Series C panelboards and motor control centers. It easily replaces older 100A installations. Rated 14kAIC at 480VAC, it is HACR rated and reverse feed capable.

Specifications

Key specifications
Brand Eaton / Cutler-Hammer
Part Number FDB2100
Series FDB
Amperage 100A
Poles 2
Mounting Style Panel Mount
Voltage 240VAC, 480VAC, 600VAC, 250VDC
Phase 1
AIC Rating 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC
Fit and installation
Frame Type FD
Terminal Type Lugs
For Use With Eaton Series C Panelboards, Switchboards, Motor Control Centers
Wire Gauge 14-1/0 AWG (Cu/Al)
Max Wire 1/0 AWG
Min Wire 14 AWG
Protection and operation
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed Thermal, Fixed Magnetic
Standards and features
Available Options Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch
Accessories Load Side Lugs
Standards CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489
Approval CE, CSA, UL
Temp Rating 40C
Construction Features HACR Rated, Reverse Feed

Product FAQs

6 answers
Can the Eaton FDB2100 be used in reverse feed applications?

Yes. All Eaton Series C F-Frame molded case circuit breakers, including the FDB2100, are suitable for reverse feed use.

Is the FDB2100 a direct replacement for older Westinghouse breakers?

Yes. Eaton acquired the Westinghouse distribution equipment line. The Eaton FDB2100 directly replaces the legacy Westinghouse FDB2100, maintaining the exact same physical dimensions and mounting footprint.

What panelboards are compatible with the FDB2100 circuit breaker?

This breaker installs into Eaton and Cutler-Hammer Series C panelboards, specifically the PRL3a and PRL4 models, as well as compatible switchboards and motor control centers.

Is the FDB2100 HACR rated for HVAC equipment?

Yes. All Eaton F-Frame molded case circuit breakers carry an HACR rating, making them suitable for heating, air conditioning, and refrigeration applications.

What is the difference between the FDB2100 and the FD2100 or HFD2100?

The difference is the interrupting capacity. The FDB2100 is the standard tier rated at 14kAIC at 480VAC. The FD2100 is rated at 35kAIC, and the HFD2100 is rated at 65kAIC at 480VAC. All three share the same physical F-Frame footprint.

Where can I find the lug torque specifications for this breaker?

The required torque values for the line and load terminals are printed directly on the circuit breaker nameplate. Always use a calibrated torque wrench during installation to ensure a secure connection.

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Reviews

5.0
Rated 5.0 out of 5 stars
Based on 2 reviews
Rating
Ratings
2 reviews
  • B
    Brent
    Verified Buyer
    Reviewing
    Eaton / Cutler-Hammer FDB3060 - 60A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    9/18/26
    Breaker was as expected.

    Breaker was clean, you could not tell it was used.

  • RF
    Russell F.
    Verified Buyer
    Reviewing
    Eaton / Cutler-Hammer FDB3025 - 25A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    2/24/26
    Right product, right time

    This is what I needed, and I got it in time.