LAP36400MB 400 Amp Circuit Breaker

LAP36400MB - 400 Amp Circuit Breaker

When you need dependable protection for heavy electrical loads, the LAP36400MB 400A molded case circuit breaker delivers. This Square D model is built for real-world industrial and commercial use, guarding your system from both slow overcurrent stress and sudden short circuits. With a 3-pole design and a maximum voltage rating of 600 VAC, it fits seamlessly into demanding power distribution networks while offering intuitive operation and installation.

Key Features and Benefits

• High-Capacity Protection: Rated for 400 amperes at up to 600 VAC, this breaker is ready for severe load demands.
• Dual Trip Mechanism: Uses thermal sensing to deal with long-term overloads and magnetic tripping for abrupt faults, giving full-spectrum defense.
• Easy to Use & Install: Comes with sturdy lugs for secure wiring and a short lever handle for fast manual control.
• Flexible Mounting: Unit-mount design accommodates a wide range of installation layouts.
• Environmental Assurance: Engineered for compliance with RoHS and REACh standards, this model supports greener, safer installations.

Technical Specifications

• Rated Current: 400 A
• Poles: 3P
• Max Operating Voltage: 600 VAC
• Interrupting Capacity:
  • 22 kA at 600 VAC
  • 10 kA at 250 VDC
• Tripping Method: Thermal + Magnetic
• Dimensions:
  • Length: 11 in (279.4 mm)
  • Width: 6 in (152.4 mm)
  • Depth: 5.84 in (148.34 mm)
• Mounting Mode: Unit mount
• Wiring: 3-wire
• Magnetic Hold Current: 2,000 A
• Magnetic Trip Current: 4,000 A

Material Compliance and Certifications

• Certifications: This breaker meets foremost safety and environmental standards. It is UL-listed, CSA-approved, and compliant with IEC 60947-2 standards.
• Environmental Compliance: Its Green-friendly design ensures adherence to RoHS and REACh regulations, making it suitable for eco-aware installations.

Where It Works Best

• The LAP36400MB is ideal in commercial and industrial settings—mainly where power is supplied via transformers or generator sets. Its HACR rating (Heating, Air Conditioning & Refrigeration) means it can be deployed confidently in HVAC systems. If your setup demands trustworthy high-current protection, this breaker is a solid match.