Square D LAL364001212 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Square D
LAL364001212
Molded Case Circuit Breaker
Brand
Square D
SKU
LAL364001212
Quantity
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Square D LAL364001212 - 400A 3 Pole Molded Case Circuit Breaker
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Description
The LAL364001212 is a heavy-duty 3-pole, 400A molded case circuit breaker from Square D's L-Frame series. It provides robust thermal-magnetic (LI) protection for commercial and industrial applications. Designed for unit-mount configurations, it fits seamlessly into compatible panelboards, switchboards, and control panels. This specific model features a factory-installed 1A/1B (1NO/1NC) auxiliary switch for remote contact status monitoring. It is replaced by the LGL36400U31X.Specifications
| Brand | Square D |
|---|---|
| Series | LAL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | LAL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Panelboards, Switchboards, Enclosures |
| 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 |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Auxiliary Switch (1A/1B) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
8 answersWhat does the 1212 suffix mean on the LAL364001212 circuit breaker?
The 1212 suffix indicates that this breaker includes a factory-installed 1A/1B auxiliary switch (one normally open and one normally closed contact) for remote status signaling.
Can I use the LAL364001212 to replace an older Square D L-Frame breaker?
Yes, this is a legacy L-Frame molded case circuit breaker designed to fit into existing Square D panelboards, switchboards, and enclosures that accept unit-mount LAL breakers.
What wire sizes are compatible with the lugs on the LAL364001212?
The factory-installed lugs accept either one 1 AWG to 600 kcmil aluminum or copper wire, or two 1 AWG to 250 kcmil aluminum or copper wires per phase.
Is the LAL364001212 rated for DC applications?
Yes, this thermal-magnetic breaker is rated for up to 250VDC with an interrupting capacity of 10kA, making it suitable for specific direct current systems.
How does the LAL364001212 mount into a panel?
This is a unit-mount, feed-thru circuit breaker. It bolts directly to the mounting pan or structure rather than plugging onto a busbar like I-Line breakers.
Are the trip settings adjustable on the LAL364001212?
The thermal, long-time trip is fixed at 400 amps, but the magnetic, instantaneous trip is adjustable to allow coordination with other protective devices in your system.
Is the LAL364001212 an I-Line breaker?
No, the LAL364001212 is a unit-mount breaker with feed-thru lugs. If you need the I-Line plug-on equivalent for a Square D I-Line panelboard, you will need the LA36400.
Does the LAL364001212 have a push-to-trip feature?
Yes, Square D L-Frame breakers feature a push-to-trip button that allows you to manually trip the breaker for testing and maintenance without exposing yourself to live electrical components.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 7 reviews.
Total 5 star reviews: 7 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
7 reviews
- MBmike b.Verified BuyerReviewingSquare D LAL36350 - 350A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/15/26LAL36350MB
OLINE ORDERING WAS EASY AND I RECEIVED THE BREAKER QUICKLY
- GCGlenn C.Verified BuyerReviewingSquare D LAL36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/27/26Breaker
I like the great price. Great service
- MIMarietta I.Verified BuyerReviewingSquare D LAL36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/27/26Great service
Received the breakers in time. My account mgr Mike is awesome.
- TBTerry B.Verified BuyerReviewingSquare D LAL36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/5/26RECERTIFIED BREAKER
Breaker was received in good condition and seems to work correctly
- LBLISA B.Verified BuyerReviewingSquare D LAL36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/28/25good [product
Expeditious delivery, great product and amazing customer service.