Schneider ElectricLGA36400CU31X
Square D LGP36400CU31X Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Square D
LGP36400CU31X
Molded Case Circuit Breaker
Brand
Square D
SKU
LGP36400CU31X
Quantity
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Square D LGP36400CU31X - 400A 3 Pole Molded Case Circuit Breaker
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Description
Built for demanding commercial and industrial applications, the Square D LGP36400CU31X is a 400A, 3-pole PowerPacT L-Frame molded case circuit breaker. It delivers reliable power distribution and circuit protection for heavy-duty electrical systems. This unit-mount MCCB installs into Square D QED switchboards, control panels, and enclosures. It features a dual-break rotary contact structure and comes equipped with standard lug terminals for secure wire connections.Specifications
| Brand | Square D |
|---|---|
| Series | LGP |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Amperage Range | 125-400A |
|---|
| Frame Type | L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D QED Switchboards, Control Panels, Enclosures |
| 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 | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle, Lug Kits, Terminal Shields |
|---|---|
| Accessories | MicroLogic 3.3 Trip Unit |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CCC, CE, CSA, IEC, NEMA, NOM, UKCA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, True RMS Sensing, Visual Trip Indicator, Dual-Break Rotary Contact Structure, 100% Rated, Mercury Free, PVC Free, RoHS Compliant, Trip-Free Mechanism |
Product FAQs
6 answersWhat applications are suitable for the LGP36400CU31X circuit breaker?
This 400A, 3-pole breaker is designed for use in Square D QED switchboards, industrial control panels, and standalone enclosures. It features a unit-mount, bolt-on design for secure installation in these systems.
Is the LGP36400CU31X an I-Line or unit-mount breaker?
This specific model is a unit-mount (bolt-on) circuit breaker. If your application requires a plug-on breaker for an I-Line panelboard, you will need an I-Line version of the PowerPacT L-Frame instead of this LGP model.
Can I use aluminum wiring with the LGP36400CU31X breaker?
Yes, the factory-installed lugs on this PowerPacT L-Frame breaker are dual-rated for both aluminum and copper conductors. Each lug can accommodate two wires ranging from 2/0 AWG to 500 kcmil.
What type of trip unit is included with the LGP36400CU31X?
This breaker is equipped with a Micrologic 3.3 electronic trip unit (indicated by the U31X suffix). It provides adjustable long-time and instantaneous (LI) protection, allowing for precise coordination in commercial and industrial electrical distribution systems.
Does the LGP36400CU31X include ground fault protection?
No, the Micrologic 3.3 trip unit provides Long-Time and Instantaneous (LI) protection only. It does not include built-in ground fault (G) protection.
Can the LGP36400CU31X be used to replace older Square D L-frame breakers?
Yes, the PowerPacT L-Frame series is often used to upgrade or replace legacy Square D L-frame breakers (such as the LA or LH series) in existing switchboards and enclosures, provided the mounting type and physical dimensions align with your panel's requirements.
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