Square D LGA36400CU33X PowerPact MCCB – 3 Pole – 400A – I-Line Plug-In – Electronic Trip Unit (MicroLogic 3.3S LSI) – Molded Case Circuit Breaker

The Schneider Electric / Square D LGA36400CU33X is a PowerPact L-Frame molded case circuit breaker (MCCB) designed for reliable protection of industrial electrical systems against overloads and short circuits. It is widely used in switchboards, control panels, and power distribution systems, offering high-performance protection with an advanced electronic trip unit and I-Line plug-in construction for fast installation.

Electrical Ratings

• Frame / Rated Current: 400 A
• Voltage Rating: up to 600 V AC
• Phase: 3 Phase
• Poles: 3 Pole
• Interrupting Capacity (AIC):
  • 35 kA @ 480 V AC
  • 18 kA @ 600 V AC
• Continuous Current Rating: 100%
• Utilization: Industrial power distribution and feeder protection

Protection and Trip Functions

• Trip Unit Technology: Electronic
• Trip Unit Model: MicroLogic Standard 3.3S
• Protection Functions (LSI):
  • Long-Time Protection (Overload)
  • Short-Time Protection
  • Instantaneous Protection
• Protection Type: Solid-state electronic
• Additional Feature: Push-to-Trip manual test button
• Contact Design: Dual-break rotating contacts (reduces peak fault current)

Configuration and Function

• Device Type: Molded Case Circuit Breaker (MCCB)
• Series: PowerPact L-Frame (LGA Series)
• Mounting Type: I-Line Style Plug-In
• Electrical Connection: I-Line line terminals / mechanical lug load side
• Phase Connection: ABC phase arrangement
• Application Type: Switchboards, control panels, industrial distribution systems

Mechanical and Physical Characteristics

• Frame Type: L-Frame
• Construction: Unit-mount / plug-in design
• High mechanical durability for industrial use
• Designed for fast installation and replacement
• Robust internal arc-handling construction

Standards and Certifications

• UL / CSA / IEC compliant
• CE marked
• NOM certified
• Manufacturer: Schneider Electric / Square D
• Series: PowerPact L-Frame

Features

• High-capacity 400A industrial MCCB
• Advanced MicroLogic 3.3S electronic trip unit
• Adjustable LSI protection for flexible coordination
• High interrupting capacity up to 35 kA @ 480V
• I-Line plug-in design for fast installation
• Dual-break rotating contact system for fault reduction
• Push-to-trip manual testing function
• 100% continuous current rating for demanding applications
• Ideal for switchboards and heavy industrial power systems
• Reliable long-term protection for electrical distribution networks

Returns are easy

You may return items within 30 days of delivery for a refund.

FREE Shipping on orders over $149.

My Circuit Breakers offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

Same Day Shipping

We strive to ship out your items within one business day.

In rare circumstances, My Circuit Breakers may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.