Schneider ElectricLGA36400CU31X
Square D LGA36400CU43XEHYP Molded Case Circuit Breaker
- 400A
- 3 Pole
- I-Line
Square D
LGA36400CU43XEHYP
Molded Case Circuit Breaker
Brand
Square D
SKU
LGA36400CU43XEHYP
Quantity
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Square D LGA36400CU43XEHYP - 400A 3 Pole Molded Case Circuit Breaker
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400A 3 Pole Molded Case Circuit Breaker
Schneider ElectricLGA36400U43X
400A 3 Pole Molded Case Circuit Breaker
400A 3 Pole Molded Case Circuit Breaker
Description
Delivering continuous power at full capacity, this 100% rated 400A PowerPacT breaker is equipped with advanced LSI electronic trip functions. An integrated ammeter provides clear current monitoring for demanding environments. Designed to fit Square D I-Line panelboards, the unit features a factory-installed padlock attachment for lockout compliance. With a 65kAIC rating at 240VAC, this current-limiting MCCB employs true RMS sensing for accurate fault detection.Specifications
| Brand | Square D |
|---|---|
| Series | LGA |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Communication Module |
|---|---|
| Accessories | Load Side Lugs Included, Padlock Attachment (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NOM, UL, UKCA |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, True RMS Sensing, Mercury Free, PVC Free, Double-Break Rotary Contact Structure, 100% Rated |
Product FAQs
7 answersWhat panelboards are compatible with the LGA36400CU43XEHYP?
This I-Line circuit breaker is designed exclusively for use in Square D I-Line panelboards and switchboards. It features a plug-on connection for the line side and standard lugs on the load side.
What does the G in the LGA36400CU43XEHYP catalog number indicate?
The G designates the interrupting rating for this PowerPacT L-Frame breaker. It provides a maximum interrupting capacity of 65kA at 240VAC, 35kA at 480VAC, and 18kA at 600VAC.
What type of trip unit is installed in this 400A breaker?
This breaker is equipped with a Micrologic 5.3A electronic trip unit, indicated by the U43X suffix. It features adjustable LSI (Long-Time, Short-Time, and Instantaneous) protection and includes an integrated ammeter for current monitoring.
What wire sizes are accepted by the load-side lugs on this breaker?
The standard load-side lugs accept two 2/0 AWG to 500 kcmil aluminum or copper conductors per phase.
How does the I-Line mounting system work for this L-Frame breaker?
The I-Line mounting design allows the breaker to plug directly into the bus stack of a Square D I-Line panelboard or switchboard. This eliminates the need for line-side wire connections, speeding up installation and ensuring a secure, factory-aligned connection.
What is the difference between the LGA36400CU43XEHYP and an LGL36400U43X?
Both are 400A, 3-pole PowerPacT L-Frame breakers with G-class interrupting ratings and Micrologic 5.3A LSI trip units. The key difference is the mounting style: the LGA features I-Line plug-on mounting, while the LGL is a unit-mount breaker with lugs on both the line and load sides.
What is the purpose of the LSI settings on the Micrologic trip unit?
The LSI (Long-Time, Short-Time, Instantaneous) settings allow electricians to precisely coordinate the breaker trip curve with other protective devices in the system. This selective coordination helps isolate faults to the nearest breaker, preventing unnecessary system-wide power outages.
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