Schneider ElectricLGA36400CU31X
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Schneider Electric LGA36400U43X Molded Case Circuit Breaker
- 400A
- 3 Pole
- I-Line
Schneider Electric
LGA36400U43X
Molded Case Circuit Breaker
Brand
Schneider Electric
SKU
LGA36400U43X
Quantity
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Schneider Electric LGA36400U43X - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Schneider Electric LGA36400U43X - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Schneider Electric |
|---|---|
| Part Number | LGA36400U43X |
| Series | LGA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Amperage Range | 125-400A |
|---|
| Frame Type | LGA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | (2) 2/0 AWG-500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Trip Unit Model | MicroLogic 5.3A Ammeter |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, Padlock Attachment, Communication Module |
|---|---|
| Accessories | MicroLogic 5.3A Trip Unit |
| Standards | CSA C22.2 No 5, HACR, IEC 60947-2, NEMA AB1, NMX J-266, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NMX, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | 80% Rated, Current Limiting, HACR Rated, Trip-Free Mechanism, Quick-Make/Quick-Break, Double-Break Rotary Contact Structure, True RMS Sensing, Mercury Free, PVC Free |
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Schneider Electric LGA36400U43X - 400A 3 Pole Molded Case Circuit Breaker
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Quantity
| Brand | Schneider Electric |
|---|---|
| Series | LGA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Amperage Range | 125-400A |
|---|
| Frame Type | LGA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | (2) 2/0 AWG-500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Trip Unit Model | MicroLogic 5.3A Ammeter |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, Padlock Attachment, Communication Module |
|---|---|
| Accessories | MicroLogic 5.3A Trip Unit |
| Standards | CSA C22.2 No 5, HACR, IEC 60947-2, NEMA AB1, NMX J-266, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NMX, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | 80% Rated, Current Limiting, HACR Rated, Trip-Free Mechanism, Quick-Make/Quick-Break, Double-Break Rotary Contact Structure, True RMS Sensing, Mercury Free, PVC Free |
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Description
Delivering advanced system monitoring, the Schneider Electric LGA36400U43X is a 400A PowerPacT L-Frame molded case circuit breaker. It provides reliable 80% rated power distribution for commercial facilities. This 3-pole MCCB is engineered for Square D I-Line panelboards and switchboards, featuring a plug-on design that simplifies installation. It features a MicroLogic 5.3A electronic trip unit with an integrated ammeter, offering adjustable LSI protection and real-time current data.Specifications
| Brand | Schneider Electric |
|---|---|
| Part Number | LGA36400U43X |
| Series | LGA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Amperage Range | 125-400A |
|---|
| Frame Type | LGA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | (2) 2/0 AWG-500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 2/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Trip Unit Model | MicroLogic 5.3A Ammeter |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, Padlock Attachment, Communication Module |
|---|---|
| Accessories | MicroLogic 5.3A Trip Unit |
| Standards | CSA C22.2 No 5, HACR, IEC 60947-2, NEMA AB1, NMX J-266, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NMX, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | 80% Rated, Current Limiting, HACR Rated, Trip-Free Mechanism, Quick-Make/Quick-Break, Double-Break Rotary Contact Structure, True RMS Sensing, Mercury Free, PVC Free |
Product FAQs
8 answersWhat type of panelboards is the LGA36400U43X designed for?
This breaker is designed exclusively for use in Square D I-Line panelboards and switchboards. It features a plug-on line side connection that mounts directly to the interior bus assembly.
What does the U43X suffix mean in the LGA36400U43X catalog number?
The U43X designation indicates the breaker is equipped with a Micrologic 5.3A electronic trip unit. This provides an integrated ammeter along with adjustable Long-Time, Short-Time, and Instantaneous (LSI) trip functions.
Is the LGA36400U43X rated for 80 percent or 100 percent continuous current?
This breaker is standard rated, meaning it is designed to carry 80 percent of its 400A nominal rating for continuous loads lasting three hours or more.
How is the LGA36400U43X connected during installation?
It utilizes an I-Line style plug-in connection on the line side to attach directly to the panelboard bus. The load side features mechanical lugs for standard wire terminations.
What wire sizes are accepted by the load side lugs on this 400A breaker?
The standard load side lugs accept two aluminum or copper conductors ranging from 2/0 AWG to 500 kcmil per phase. Proper torque must be applied during installation as specified on the breaker label.
Does the LGA36400U43X require a specific phase connection on the bus?
This specific catalog number is configured for a standard ABC phase connection on the I-Line bus, which is typical for standard three-phase commercial and industrial panelboards.
How does the Micrologic 5.3A LSI trip unit improve system protection?
The adjustable Long-Time, Short-Time, and Instantaneous settings allow electricians to precisely coordinate the breaker with other protective devices in the system. This selective coordination helps isolate faults and minimize power outages, while the ammeter allows for real-time load monitoring.
Can the LGA36400U43X replace older Square D L-frame I-Line breakers?
Yes, this PowerPacT L-frame breaker can often replace older or obsolete Square D 400A I-Line breakers of the same physical frame size. You must verify that the LSI trip unit and interrupting ratings meet your current facility requirements before upgrading.
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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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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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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.
Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 3 reviews.
Total 5 star reviews: 3 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
3 reviews
- GGGregory G.Verified BuyerReviewingSquare D LGA36400U31X - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/29/26great
perfect
- PHPaul H.Verified BuyerReviewingSquare D LGA36400U31X - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/11/26Prompt Delivery
We needed this breaker promptly for a scheduled outage of an entire building electrical service and Superbreakers delivered.
- GMGreg M.Verified BuyerReviewingSquare D LGA36400U31X - 400A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/24/26Received in a timely manner.
The breaker was as advertised.