LH36400 - 400 Amp Circuit Breaker

LH36400 - 400 Amp Circuit Breaker

Finding a 400A breaker is easy enough. Finding one that actually matches the electrical and mechanical requirements of an existing I-Line installation takes a closer look. The LH36400 is a 400A, 3-pole molded-case circuit breaker with thermal-magnetic trip technology. Manufacturer information gives it a 25 kA interrupting rating at 600VAC and 50 kA at 250VDC, with a 2,000A magnetic hold current and 4,000A magnetic tripping current. Its connection arrangement is equally important: I-Line on the line side, AL400LA lugs on the load side. Together, those specifications give you a much more useful way to identify an LH36400 replacement than simply searching for another breaker with a 400-amp handle rating.

Key Features and Benefits

• 400A, 3-pole molded case circuit breaker for compatible I-Line electrical distribution equipment
• Thermal-magnetic trip technology responds to overload and short-circuit conditions
• Manufacturer-specified 2,000A magnetic hold current
• Manufacturer-specified 4,000A magnetic tripping current
• I-Line line-side connection matches the specified mounting arrangement
• AL400LA load-side lugs provide an important terminal reference when checking an existing installation
• Push-to-Trip allows manual tripping without exposure to live parts
• HACR rated for applicable heating, air-conditioning, and refrigeration applications
• A practical form, fit, and functional replacement candidate when existing equipment specifically requires the LH36400 configuration

Technical Specifications

• Catalog Number: LH36400
  
• Product Type: Molded Case Circuit Breaker
  
• Frame / Series: LH
  
• Rated Current: 400A
  
• Number of Poles: 3
  
• Trip Unit Technology: Thermal-Magnetic
  
• Breaking Capacity Code: H
  
• Interrupting Rating at 600VAC: 25 kA
  
• Interrupting Rating at 250VDC: 50 kA
  
• Magnetic Hold Current: 2,000A
  
• Magnetic Tripping Current: 4,000A
  
• Mounting Mode: I-Line
  
• Line-Side Connection: I-Line
  
• Load-Side Connection: Lugs
  
• Terminal Identifier: AL400LA
  
• Height: 12.5 in. (317.5 mm)
  
• Width: 6 in. (152.4 mm)
  
• Depth: 4 in. (101.6 mm)
  
• Circuit Breaker Application: HACR Rated
  
• Country of Origin: Mexico
  
• GTIN: 785901339434
  

Material Compliance and Certifications

The manufacturer specification data identifies the LH36400 as UL Listed and CSA certified. The accompanying product description further identifies LH molded case circuit breakers with UL 489, CSA, and IEC certification.

Where It Works Best

The LH36400 400A 3-pole circuit breaker is most relevant when you're maintaining existing or legacy I-Line electrical distribution equipment and the application calls for this specific breaker configuration.

Start with the electrical match. The equipment should require a 400A, three-pole thermal-magnetic breaker, and system requirements should match the manufacturer's stated 25 kA interrupting rating at 600VAC or 50 kA rating at 250VDC, as applicable. The 2,000A magnetic hold current and 4,000A magnetic tripping current are worth checking as part of that comparison.