Square D LGA36400U33X 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 LGA36400U33X is a PowerPact L-Frame molded case circuit breaker (MCCB) designed for reliable protection of industrial electrical distribution systems. It provides advanced solid-state electronic protection against overloads, short circuits, and instantaneous faults, making it suitable for use in switchboards, control panels, and heavy-duty power distribution systems.

Electrical Ratings

• Frame / Rated Current: 400 A
• Voltage Rating: up to 600 V AC
• Phase: 3 Phase
• Poles: 3 Pole
• Interrupting Capacity: 35 kA @ 480 V AC
• Utilization: Industrial power distribution and feeder protection
• Can be used for 2-pole applications (configuration dependent)

Protection and Trip Functions

• Trip Unit Technology: Electronic (Solid State)
• Trip Unit Model: MicroLogic Standard 3.3S
• Protection Functions (LSI):
  • Long-Time Protection (Overload)
  • Short-Time Protection
  • Instantaneous Protection
• Protection Type: Solid-state electronic
• Coordination: Adjustable trip settings for system selectivity

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 / plug-in interface
• Application Type: Switchboards, enclosures, and industrial distribution systems
• Frame Type: L-Frame heavy-duty construction

Mechanical and Physical Characteristics

• Dimensions (H × W × D): 4.33 × 5.51 × 13.39 in
• Weight: 13.67 lb
• Compact industrial MCCB form factor
• Designed for easy plug-in installation and replacement
• High mechanical durability for industrial environments

Standards and Certifications

• UL Listed
• CSA Approved
• IEC compliant design
• Manufacturer: Schneider Electric / Square D
• Series: PowerPact L-Frame

Features

• High-performance 400A MCCB for industrial distribution systems
• Advanced MicroLogic 3.3S electronic trip unit (LSI protection)
• 35 kA interrupting capacity at 480V for strong fault protection
• I-Line plug-in design for fast installation and maintenance
• Adjustable trip settings for improved coordination
• Solid-state protection for accurate fault response
• Suitable for switchboards, control panels, and feeders
• Compact yet robust L-Frame construction
• Long service life in demanding electrical environments