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Square D LA364001021 - 400A 3 Pole Molded Case Circuit Breaker

Brand Square D
SKU LA364001021

Square D LA364001021 - 400A 3 Pole Molded Case Circuit Breaker

Brand Square D
SKU LA364001021
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Square D LA364001021 - 400A 3 Pole Molded Case Circuit Breaker

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$5742.00 In stock

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DescriptionSpecificationsSuperClubWarranties
Description
Built for advanced control, the Square D LA364001021 is a 3-pole, 400A legacy L-Frame circuit breaker featuring a factory-installed 120-240VAC shunt trip. This allows facility managers to remotely open the circuit for enhanced safety and automation. The breaker mounts into standard Square D I-Line panelboards and switchboards. When transitioning to newer equipment, it crosses over to the PowerPacT LJA36400U31XSA. It delivers 42kAIC at 240V and includes an adjustable magnetic trip mechanism.

Specifications

Brand Square D
Series LA
Amperage 400A
Voltage 240VAC, 480VAC, 600VAC, 250VDC
Poles 3
Phase 3
AIC Rating 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC
Mounting Style I-Line
Terminal Type Lugs
For Use With Square D I-Line Panelboards and Switchboards
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed Thermal, Adjustable Magnetic
Wire Gauge (1) 1 AWG - 600 kcmil (Al/Cu) or (2) 1 AWG - 250 kcmil (Al/Cu)
Max Wire 600 kcmil
Min Wire 1 AWG
Available Options Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment
Accessories Shunt Trip (120-240VAC)
Standards CSA C22.2 No. 5, HACR, IEC 60947-2, UL 489
Approval CSA, IEC, UL
Temp Rating 40C
Construction Features HACR Rated, Visual Trip Indicator

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Warranties

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When shopping with SuperBreakers, you’ll have peace of mind knowing that every single item you purchase includes a 60 day warranty, free of charge. Why such confidence? Because only the highest quality electrical parts have a place on our shelves, and we stand by every single one we sell.

If anything goes wrong with your item that is not a result of misuse or normal wear and tear, we’ll gladly replace it at no cost to you.

Click here to read our full warranty details

Shipping

Free Shipping Policy

Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.

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Same Day Shipping

We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
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Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping

All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.

5.0
Rated 5.0 out of 5 stars
Based on 12 reviews
Total 5 star reviews: 12 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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12 reviews
  • CE
    Craig E.
    Verified Buyer
    Reviewing
    Eaton / Cutler-Hammer LA3600 - 600A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    10/13/25
    Westinghouse breaker

    Excellent customer service and quick shipping

    Was this helpful?
  • CL
    Clifton L.
    Verified Buyer
    Reviewing
    Square D LA36400 - 400A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    9/30/25
    estimator

    Good

    Was this helpful?
  • BC
    Benjamin C.
    Verified Buyer
    Reviewing
    Eaton / Cutler-Hammer LA3225 - 225A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    8/4/25
    Refurbished Breaker

    Breaker seems to be working great, no complaints from Client

    Was this helpful?
  • JM
    Jerry M.
    Flag of United States
    Reviewing
    Eaton / Cutler-Hammer LA3400 - 400A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    3/14/23
    Where is my breaker?

    Where is my breaker?

    Was this helpful?
  • KL
    Ken L.
    Flag of United States
    Reviewing
    Eaton / Cutler-Hammer LA3250 - 250A 3 Pole Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    10/7/22
    Great Experience

    It was a pleasure working with James on this opportunity he was able to provide me a fast quote and we were able to ship the breaker out overnight.

    Was this helpful?

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