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Square D FAL341001388 Molded Case Circuit Breaker

  • 100A
  • 3 Pole
  • Unit Mount
Square D FAL341001388
Molded Case Circuit Breaker
Brand Square D
SKU FAL341001388
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  • 100A
  • 3 Pole
  • Unit Mount

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Square D FAL341001388 - 100A 3 Pole Molded Case Circuit Breaker

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$1,003.17 In Stock

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Description SpecificationsProduct FAQs SuperClub Warranties Shipping Reviews 5.0 (39)

Description

Engineered for industrial use, the FAL341001388 is a 3-pole, 100A thermal-magnetic MCCB from Square D. It delivers dependable long-time and instantaneous (LI) protection. This legacy F-Frame breaker mounts into Square D enclosures and control panels. It is replaced by the HDL36100, requiring a separate 277-480V shunt trip and aux switch. Rated 18kAIC at 480VAC, it includes a factory-installed 277-480VAC shunt trip and a 1A/1B auxiliary switch for advanced monitoring.

Specifications

Key specifications
Brand Square D
Series FAL
Amperage 100A
Poles 3
Mounting Style Unit Mount
Voltage 240VAC, 480VAC, 250VDC
Phase 3
AIC Rating 25kA @ 240VAC, 18kA @ 480VAC, 10kA @ 250VDC
Fit and installation
Frame Type FAL
Terminal Type Lugs
For Use With Square D Enclosures, Switchboards, Control Panels
Wire Gauge 14-1/0 AWG (Cu), 12-1/0 AWG (Al)
Max Wire 1/0 AWG
Min Wire 14 AWG (Cu), 12 AWG (Al)
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 Undervoltage Release, Alarm Switch, Padlock Attachment
Accessories Shunt Trip (Factory Installed), Auxiliary Switch (Factory Installed), Line and Load Lugs Included
Standards CSA C22.2 No. 5, HACR Rated, NEMA AB 1, UL 489
Approval CSA, UL
Temp Rating 40C
Construction Features HACR Rated, Visual Trip Indicator

Product FAQs

6 answers
What equipment is the Square D FAL341001388 designed to fit?

This F-frame breaker is built for unit-mount applications in Square D enclosures, industrial control panels, and switchboards. It uses a feed-thru connection and is not compatible with I-Line panelboards or standard residential load centers.

What are the acceptable wire sizes for the FAL341001388 lugs?

The standard lugs accommodate 14 AWG to 1/0 AWG copper conductors, or 12 AWG to 1/0 AWG aluminum conductors. Ensure proper torque specifications are followed during installation as outlined by Schneider Electric.

Is this breaker rated for direct current (DC) systems?

Yes, in addition to its AC ratings, the FAL341001388 is rated for 250VDC applications, providing a 10kA interrupting capacity for DC circuits.

Are the trip settings adjustable on this 100A breaker?

No, the FAL341001388 utilizes a thermal-magnetic trip unit with fixed thermal and fixed magnetic settings for long-time and instantaneous (LI) protection.

What does the "1388" suffix mean on this Square D part number?

In Square D nomenclature, a four-digit suffix indicates factory-installed internal accessories. The "1388" suffix signifies that the breaker is equipped with a combination of an auxiliary switch (1A/1B) and a shunt trip.

What is the modern replacement for the legacy FAL341001388?

The FAL series is a legacy product. Schneider Electric has replaced this line with the PowerPact H-frame series. The HGL36100 is commonly used as the modern equivalent, though you must verify panel mounting and accessory requirements before upgrading.

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Reviews

5.0
Rated 5.0 out of 5 stars
Based on 39 reviews
Reviews Summary
Customers say this circuit breaker arrives in excellent condition and works as expected. The product performs flawlessly and functions reliably. Many reviews highlight fast shipping, competitive pricing, and quick delivery times. Users appreciate the availability of refurbished and obsolete models. The parts arrive well-packed and in like-new condition. Common feedback addresses excellent communication and straightforward ordering. Overall, customers report satisfaction with product quality, value, and prompt service fulfillment.
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39 reviews
  • PC
    Pierre C.
    Verified Buyer
    Reviewing
    Square D FAL3603015M - 30A 3 Pole Motor Circuit Protector
    I recommend this product
    Rated 5 out of 5 stars
    9/15/26
    Great service!!!

    Bought this to replace the faulty one. Shipped overnight and arrived at noon as promised. Works as new. Very happy with this. Awesome help from the staff. Definitely my go to place now.

    Thank you.

    Was this helpful?
  • MB
    Michael B.
    Verified Buyer
    Reviewing
    Square D FAL32030 - 30A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    8/13/26
    Great product

    This item worked as expected and is good quality. SuperBreakers did a great job with communication and delivery.

    Was this helpful?
  • ZB
    Zachary B.
    Verified Buyer
    Reviewing
    Square D FAL36040 - 40A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    7/23/26
    Perfect

    Exactly what we needed and worked flawlessly. Thanks

    Was this helpful?
  • JR
    John R.
    Verified Buyer
    Reviewing
    Square D FAL36100 - 100A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    6/29/26
    Circuit Breaker

    The breaker was in "like new" condition and well packed for shipping. Excellent value overall!

    Was this helpful?
  • RF
    Ron F.
    Verified Buyer
    Reviewing
    Square D FAL340801021 - 80A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    5/13/26
    Square D FAL340801021 - 80A 3 Pole Molded Case Circuit Breaker

    As usual SB has the best price and delivery was spot on!

    Was this helpful?