Schneider Electric LA36400-1021 LA364001021 - 400A 3 Pole Molded Case Circuit Breaker
- 400A
- 3 Pole
- I-Line
Quantity
Schneider Electric LA364001021 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Schneider Electric LA364001021 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Schneider Electric |
|---|---|
| Part Number | LA36400-1021 |
| Series | LA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 125VDC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480Y/277VAC, 30kA @ 480VAC, 22kA @ 600Y/347VAC, 22kA @ 600VAC, 10kA @ 125VDC, 10kA @ 250VDC |
| Frame Type | LA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| Wire Gauge | 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 | Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip 120-240VAC |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Push-To-Trip, Visual Trip Indicator |
Quantity
Schneider Electric LA364001021 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Schneider Electric |
|---|---|
| Series | LA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 125VDC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480Y/277VAC, 30kA @ 480VAC, 22kA @ 600Y/347VAC, 22kA @ 600VAC, 10kA @ 125VDC, 10kA @ 250VDC |
| Frame Type | LA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| Wire Gauge | 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 | Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip 120-240VAC |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Push-To-Trip, Visual Trip Indicator |
Description
Built for industrial environments, the Schneider Electric LA36400-1021 is a 3-pole, 400A MCCB from the legacy L-Frame family. It utilizes thermal-magnetic technology with an adjustable magnetic trip. This unit plugs into Square D I-Line panelboards and switchboards. For facilities upgrading, this breaker is replaced by the LJA36400U31X, which requires a separate S29386 shunt trip. The "-1021" suffix indicates a factory-installed 120-240VAC shunt trip for remote operation.Specifications
| Brand | Schneider Electric |
|---|---|
| Part Number | LA36400-1021 |
| Series | LA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 125VDC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480Y/277VAC, 30kA @ 480VAC, 22kA @ 600Y/347VAC, 22kA @ 600VAC, 10kA @ 125VDC, 10kA @ 250VDC |
| Frame Type | LA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| Wire Gauge | 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 | Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip 120-240VAC |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Push-To-Trip, Visual Trip Indicator |
Product FAQs
6 answersWhat does the -1021 suffix indicate on the LA36400-1021 circuit breaker?
The -1021 suffix designates that this breaker includes a factory-installed 120/240VAC shunt trip. This allows the breaker to be opened remotely by an external control signal.
How does the LA36400-1021 connect to the panelboard?
It features an I-Line style plug-in connection, allowing it to mount directly onto the bus stack of compatible Square D I-Line panelboards and switchboards without requiring separate mounting hardware.
What are the lug wire capacity and material requirements for installing the LA36400-1021?
The standard lugs accept either a single 1 AWG to 600 kcmil wire or dual 1 AWG to 250 kcmil wires per phase. Both aluminum and copper conductors are supported.
How does the trip unit function on the LA36400-1021?
This breaker uses a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection.
What is the modern replacement for the legacy LA36400-1021 breaker?
The LA36400-1021 is a legacy L-Frame breaker. For modern upgrades, it is typically replaced by the PowerPact LGL36400 frame, which requires a separate shunt trip accessory (such as the S29386) to match the -1021 remote trip functionality.
Does the LA36400-1021 include a push-to-trip feature?
Yes, Square D LA breakers include a push-to-trip button that allows the circuit breaker to be manually tripped without exposure to live parts. This is useful for safely testing the mechanical operation of the breaker.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 13 reviews.
- RGRobert G.Verified BuyerReviewingSquare D LA36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/16/26LA36400
Perfectly boxed and arrived on time. Thanks for the shirt and stickers as well.
- CECraig E.Verified BuyerReviewingEaton / Cutler-Hammer LA3600 - 600A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/13/25Westinghouse breaker
Excellent customer service and quick shipping
- CLClifton L.Verified BuyerReviewingSquare D LA36400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/30/25estimator
Good
- BCBenjamin C.Verified BuyerReviewingEaton / Cutler-Hammer LA3225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/4/25Refurbished Breaker
Breaker seems to be working great, no complaints from Client
- JMJerry M.ReviewingEaton / Cutler-Hammer LA3400 - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/14/23Where is my breaker?
Where is my breaker?