LC36400 - 400 Amp Circuit Breaker

LC36400 - 400 Amp Circuit Breaker

Get dependable circuit protection with the LC36400 I-Line circuit breaker from Schneider Electric / Square D. Built for challenging industrial environments, this three-pole, 400 A, 600 V AC breaker uses a thermal-magnetic trip to guard against both overloads and short circuits. Its design offers high fault-current handling, easy integration, and clear fault indication to keep your systems safe and running smoothly.

Key Features and Benefits

• High fault clearing ability: With an interrupting rating of up to 35 kA at 600 VAC (and even higher in lower-voltage systems), the LC36400 can safely break high fault currents without risking damage.
• Thermal-magnetic trip unit: Combines thermal protection (for sustained overloads) and magnetic protection (for sudden surges) in one unit to reduce downtime and safeguard equipment.
• Plug-in I-Line mounting: The I-Line style plug-in design allows fast, tool-free installation or replacement, simplifying service in panelboards, busway systems, and more.
• Clear trip indication: The handle falls into a central “tripped” position when it opens, giving technicians a quick visual cue to that branch’s status during diagnostics.
• Scalable adaptability: Whether you're expanding or replacing, the modular nature of I-Line breakers makes upgrades or changes easier to manage.

Technical Specifications

• Rated Current: 400 Amps
  
• Voltage Rating: 600 V AC
  
• Interrupting Rating:
  • 35 kA @ 600 VAC (higher values at 480 VAC)
• Poles: 3 (Three-Phase)
  
• Mounting Type: I-Line plug-in
  
• Frame Type / Trip Style: LC frame with thermal-magnetic protection
  
• Functions: LI — Long-Time and Instantaneous trip elements
  

Material Compliance and Certifications

• UL 489 Certified: Meets safety and performance requirements for molded-case circuit breakers.
• CSA and IEC standards: Acceptable for international installations with recognized global compliance.
• Green Premium label: Meets Schneider Electric’s environmental criteria, minimizing harmful materials and carbon footprint.

Where It Works Best

• Panelboards & Industrial Enclosures: Ideal drop-in replacement for high-current circuits, especially where busway or plug-in architecture is used.
• Motor Control Centers (MCCs): Protects motors and feeders where high inrush currents demand reliable interruption.
• Busway Plug-In Units: Works well in bus plug systems where modular, quick-swappable units are needed.
• Combination Starters & Control Circuits: Use in systems where both switching and protective functions are required.