Square D LA 2-Pole Molded Case...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,078.99
Square D LA 2-Pole Molded Case Circuit Breaker, Thermal Magnetic

Square D LA 2-Pole Molded Case Circuit Breaker, Thermal Magnetic

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Model: LAL26400

In Stock (leaves warehouse same day if ordered before 3pm ET)

$3,078.99
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Square D LA Series 2-Pole Molded Case Circuit Breaker, Thermal Magnetic, 600VAC

The Square D LA Series 2-Pole Molded Case Circuit Breaker, Thermal Magnetic, 600VAC provides automatic circuit interruption under overload or short-circuit conditions, plus manual opening, using thermal and magnetic sensing in each pole. Rated 600VAC with a 22kA interrupt rating, and 250VDC with a 10kA interrupt rating, this LA-frame breaker terminates on line and load lugs and is UL Listed and HACR rated.

Key Features

  • Thermal Magnetic Protection: Thermal sensing for overload and magnetic sensing for short-circuit conditions in each pole.
  • 2-Pole Configuration: Multi-pole circuit interruption for 2-pole feeder and branch circuits.
  • Voltage & Interrupt Rating: 600VAC with a 22kA interrupt rating; 250VDC with a 10kA interrupt rating.
  • Lugs Connection: Line and load lugs at 13-13 N.m tightening torque, accepting AWG 1...600 kcmil (line) and AWG 1...250 kcmil (load) conductors.
  • Push-to-Trip: Manually trips the breaker without exposure to live parts.
  • Manual or Automatic Operation: Manual circuit opening or automatic interruption for overload or short-circuit conditions.
  • HACR Rated: Suitable for heating, air conditioning, and refrigeration circuit applications.

Certifications & Compliance

  • UL Listed
  • CSA Certified
  • IEC Certified
  • RoHS Compliant with Exemptions
  • Halogen-Free Plastic Parts
  • Mercury Free

Technical Specifications

  • Warranty Period: 18 months
  • Sustainable Packaging: Yes
  • Recycled Metal Content At Cr Level: 0 %
  • Serviceability: No
  • With Recycled Cardboard: Yes
  • China ROHS In Scope: No
  • Return Indicator: Y
  • Tier: 3
  • Legacy WEEE Scope: In
  • Packaging Made With Recycled Cardboard: Yes
  • Without Single Use Plastic: Yes
  • ROHS Exemption Information: Yes
  • WEEE Product Category: 4
  • Warranty: 18 months
  • Mercury Free: Yes
  • Packaging Without Single Use Plastic: Yes
  • Tier Id: 3
  • ROHS Eur In Scope: Yes
  • Environmental Disclosure: ENVPEP1410004EN
  • Html Descr: MOLDED CASE CIRCUIT BREAKERLine Rated Current : 250 ANumber of Poles : 3Prated operational voltage : 600 V AC, 250 V DCMounting: Unit mountInterrupt Rating : 22 kA 600 V AC, 10 kA 250 V DC
  • Function Option Id: STANDARD
  • ROHS Eur Status: Compliant with Exemptions
  • Average Life Duration: 15 year(s)
  • Take Back: No

Typical Applications

  • Commercial and Industrial Electrical Distribution
  • Panelboard and Load Center Circuit Protection
  • Feeder and Branch Circuit Protection
  • HACR-Rated Equipment Circuits
  • Motor and Equipment Overload Protection

Why Square D?

Square D LA Series circuit breakers pair thermal magnetic protection with a UL Listed, HACR-rated molded case design built for overload and short-circuit interruption. With Push-to-Trip functionality and lugs terminations rated to 600VAC/22kA and 250VDC/10kA, this breaker is built for consistent performance in commercial and industrial electrical systems.

Manufacturer Resources

Product Specs

Series:
LA
Department:
Electrical
Listing:
UL Listed
Configuration:
2-Pole
Product Type:
Circuit Breaker
Connection Type:
Lugs
Product Group:
Circuit Protection
Product Subgroup:
Circuit Breakers
Product Width:
6 in
Product Height:
11 in
Product Depth:
5.84 in

Square D LAL26400 – Frequently Asked Questions

1) What voltage and interrupt ratings does the Square D LA series molded case breaker carry?
The LA-frame breaker is rated 600VAC with a 22kA interrupting rating, and 250VDC with a 10kA interrupting rating. That covers 480Y/277V and 600V commercial and industrial distribution as well as DC applications within the 250V limit. If your available fault current at the point of installation exceeds 22kA on the AC side, you need a higher interrupting frame.
2) What wire sizes do the lugs on the Square D LA breaker accept?
Line and load terminations are lugs. The line side accepts AWG 1 through 600 kcmil and the load side AWG 1 through 250 kcmil, both torqued to 13 N.m. Check your feeder conductor size against those ranges before you pull cable, particularly on the load side where the top end stops at 250 kcmil.
3) What ampere ratings are available on the Square D LAL breaker?
Two current ratings are offered: 250A (LAL36250) and 400A (LAL26400). Both are thermal magnetic, with thermal sensing handling sustained overload and magnetic sensing handling short circuits in each pole.
4) I need a molded case breaker for a 3-phase feeder, not a 2-pole circuit. What should I look at instead of the Square D LA?
The Square D LA molded case breaker is built in a 2-pole configuration for 2-pole feeder and branch circuits, so it is not the part for a three-phase feeder. For a 3-pole molded case breaker, the ABB A2N series A2A150TT and the ABB E150 series thermal magnetic breaker are both 3-pole molded case units. The ABB E150 shares the LA's thermal magnetic sensing approach, so it is the closer match in protection type when you need the third pole.
5) Is an ABB ST200M miniature circuit breaker a substitute for a Square D LA breaker?
No. The ABB ST200M is a miniature circuit breaker listed to UL1077, which covers supplementary protectors rather than branch circuit protection. The Square D LA is a molded case circuit breaker, UL Listed and HACR rated, rated 600VAC with a 22kA interrupt rating and 250VDC at 10kA, terminating on line and load lugs. The two are different classes of device and the ST200M should not be dropped in where an LA-frame molded case breaker is specified.
6) What is the MB suffix on Square D LAL26400MB and LAL36250MB?
MB designates the MB terminal version rated for 600VAC service, ordered as LAL26400MB at 400A or LAL36250MB at 250A. The plain LAL26400 and LAL36250 are the standard connection versions. Pick based on the termination arrangement your panelboard or enclosure was built for, because the two are not interchangeable at the terminal.
7) Can I use this Square D breaker on a rooftop unit or chiller circuit?
Yes. The LA series is HACR rated, so it is suitable for heating, air conditioning and refrigeration equipment circuits, and it is listed for motor and equipment overload protection. Size it against the equipment nameplate; the 250A and 400A ratings are what is offered in this frame.
8) Is the Square D LA circuit breaker UL Listed and CSA certified?
It is UL Listed and CSA Certified, and also IEC certified. On the environmental side it is RoHS compliant with exemptions, mercury free, and uses halogen-free plastic parts.
9) Where does the Square D LA breaker get installed in a distribution system?
It is a unit-mount molded case breaker used for feeder and branch circuit protection in panelboards and load centers, in commercial and industrial distribution, plus motor and equipment circuits. It is not a miniature DIN-rail device; if you need a DIN-rail supplementary protector instead, that is a different class of product such as the ABB ST200M, which is a UL1077 miniature breaker.
10) What is the closest equivalent to the Square D LA thermal magnetic breaker from another manufacturer?
On protection type, the ABB E150 series 3-pole thermal magnetic circuit breaker is the nearest comparable, since it uses the same thermal magnetic sensing principle in a molded case breaker. The difference to confirm before you order is pole count: the Square D LA is supplied 2-pole, while the E150 is a 3-pole device. If your panel schedule calls for two poles, stay with the LA frame and select the LAL26400 or LAL36250 by the current you need.
11) We were quoted an ABB XT4 breaker kit. Does that replace a Square D LA breaker?
The ABB MBB33 is an XT4 series 3-pole molded case circuit breaker kit, which is a different frame and pole count from the Square D LA. The LA is a 2-pole LA-frame breaker with line and load lug terminations, offered with standard connections or MB terminals rated 600VAC. If the existing equipment is built around the LA frame and lug landings, an XT4 kit is not a drop-in and the enclosure or panel interface has to be verified separately.
12) How do I test-trip this breaker without opening the enclosure to live parts?
The LA series has a Push-to-Trip button that trips the mechanism manually, so the trip function can be exercised without contact with live parts. The breaker can also be opened manually by the handle, or it trips automatically on overload or short circuit.
13) Is this breaker field serviceable or repairable?
No. The LA series is a sealed molded case design listed as non-serviceable, with an average life duration of 15 years. If it fails or is damaged, it gets replaced rather than rebuilt.
How fast can I get the Square D LAL26400 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Square D LAL26400 come with a warranty?
Absolutely. The Square D LAL26400 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Square D LAL26400?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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