- Same Day Priority Shipping Available -
SuperClub

Square D LA26400AC - 400A 2 Pole Molded Case Circuit Breaker

Brand Square D
SKU LA26400AC
5.0
Rated 5.0 out of 5 stars
12 Reviews

Square D LA26400AC - 400A 2 Pole Molded Case Circuit Breaker

Brand Square D
SKU LA26400AC
5.0
Rated 5.0 out of 5 stars
12 Reviews
Select Item Condition
Earn 4399 SuperPoints

Quantity
Planning a Big Order?
Bulk pricing available—let us know your needs for a quote.
Get a quote
Shop with Confidence
Enjoy a free 60-day warranty, extendable to 1 year at checkout.
Learn more

Square D LA26400AC - 400A 2 Pole Molded Case Circuit Breaker

New

$4399.53 In stock

Quantity

DescriptionSpecificationsSuperClubWarranties
Description
Engineered for commercial power distribution, the Square D LA26400AC is a 2-pole, 400A molded case circuit breaker. It provides reliable thermal-magnetic protection with fixed thermal and adjustable magnetic trip settings. This unit installs into Square D I-Line panelboards and switchboards, utilizing a factory-configured AC phase jaw arrangement. For modern upgrades, this legacy LA frame is replaced by the PowerPacT LJA36400U31X. Rated for 42kAIC at 240VAC and 22kAIC at 600VAC.

Specifications

Brand Square D
Series LA
Part Number LA26400AC
Amperage 400A
Voltage 240VAC, 480VAC, 600VAC, 250VDC
Poles 2
Phase 1
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 Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment
Accessories Phase Connection AC (Factory Configured Jaw Arrangement)
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, Phase Connection AC

SuperClub

Get rewarded every time you shop! Join SuperClub for free and start earning points on every purchase, unlocking exclusive discounts, special promos, and VIP perks. Already a member? Keep shopping to level up your rewards and enjoy even more benefits, including faster shipping, extended returns, and premium offers.

Learn more about SuperClub

Warranties

We’ve got you covered!

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.

Click here to read our full shipping policy
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.
Expedited Shipments

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
Search
Search Reviews
Rating
Ratings
Write a Review (Opens in a new window)
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?

Related Products

Recently Viewed