Square D LGA36400U44X PowerPact MCCB – 3 Pole – 400A – I-Line Plug-In – Electronic Trip Unit (MicroLogic 6.3A LSIG) – Molded Case Circuit Breaker with Ground Fault Protection

The Schneider Electric / Square D LGA36400U44X is a PowerPact L-Frame molded case circuit breaker (MCCB) designed for advanced protection of industrial electrical distribution systems. It provides reliable overload, short-circuit, instantaneous, and ground fault protection using a solid-state MicroLogic electronic trip unit, making it ideal for critical power systems, switchboards, and industrial control panels.

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 6.3A
• Protection Functions (LSIG):
  • Long-Time Protection (Overload)
  • Short-Time Protection
  • Instantaneous Protection
  • Ground Fault Protection
• Protection Type: Solid-state electronic
• Advanced metering capability (ammeter-based trip unit variant)
• Adjustable protection settings for system coordination

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 system
• 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 design
• Plug-in installation for fast maintenance and replacement
• High mechanical durability for harsh industrial environments

Standards and Certifications

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

Features

• High-capacity 400A industrial MCCB for distribution systems
• Advanced MicroLogic 6.3A electronic LSIG trip unit
• Full protection: overload, short circuit, instantaneous, and ground fault
• 35 kA interrupting capacity at 480V for strong fault protection
• I-Line plug-in system for fast installation and serviceability
• Adjustable protection settings for coordination flexibility
• Solid-state electronic sensing for high accuracy and reliability
• Suitable for critical power systems and industrial switchboards
• Long operational life in demanding environments
• Enhanced safety with ground fault protection capability

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.