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Eaton / Cutler-Hammer FDB3040L Molded Case Circuit Breaker

  • 40A
  • 3 Pole
  • Unit Mount
Eaton / Cutler-Hammer FDB3040L
Molded Case Circuit Breaker
Brand Eaton / Cutler-Hammer
SKU FDB3040L
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  • 40A
  • 3 Pole
  • Unit Mount

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Eaton / Cutler-Hammer FDB3040L - 40A 3 Pole Molded Case Circuit Breaker

Eaton / Cutler-Hammer FDB3040L - 40A 3 Pole Molded Case Circuit Breaker

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$864.20 In Stock

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Description

Belonging to Eaton's Series C family, this 3-pole, 40A MCCB provides reliable long-time and instantaneous (LI) trip functions. It is built for demanding commercial and industrial environments. The unit mount design integrates into Series C panelboards, switchboards, and motor control centers. It replaces older F-frame models like the FD3040. Rated at 14kAIC at 480VAC, it includes line and load lugs. The breaker is HACR rated for HVAC equipment and supports reverse feed configurations.

Specifications

Key specifications
Brand Eaton / Cutler-Hammer
Part Number FDB3040L
Series FDB
Amperage 40A
Poles 3
Mounting Style Unit Mount
Voltage 240VAC, 480VAC, 600VAC, 250VDC
Phase 3
AIC Rating 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC
Fit and installation
Frame Type F
Terminal Type Lugs
For Use With Eaton Series C Panelboards, Motor Control Centers, Switchboards
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, Padlock Attachment, Motor Operator, Handle Lock
Accessories Line and Load 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, Non-Interchangeable Trip

Product FAQs

6 answers
What does the L suffix mean in the FDB3040L catalog number?

The L suffix indicates that the circuit breaker is supplied with factory-installed line and load terminal lugs.

Can the Eaton FDB3040L be used in reverse feed applications?

Yes. Eaton Series C F-Frame circuit breakers, including the FDB3040L, are suitable for reverse feed applications.

Which panelboards are compatible with the FDB3040L breaker?

This breaker is designed for Eaton Series C panelboards, switchboards, and motor control centers. It is commonly installed in Pow-R-Line 3A (PRL3A) and Pow-R-Line 4 (PRL4) panelboards using the appropriate F-Frame connector kits.

Is the FDB3040L rated for HVAC and lighting loads?

Yes. All Eaton F-Frame circuit breakers are HACR rated for heating, air conditioning, and refrigeration equipment. Because it is a 40A thermal-magnetic breaker, it is also rated for High Intensity Discharge (HID) lighting applications.

Can this breaker replace older Westinghouse FDB3040L models?

Yes. Eaton acquired the Cutler-Hammer and Westinghouse circuit breaker lines. The current Eaton FDB3040L is a direct replacement for legacy Westinghouse and Cutler-Hammer breakers sharing the same catalog number.

How is the FDB3040L mounted in a panelboard?

It is a unit-mount, feed-thru circuit breaker. When installing it in panelboards like the PRL3A, it requires a specific F-Frame connector kit, such as the KPRL3AFD3 for 3-pole configurations, to properly connect to the bus.

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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.