LH26400AC - 400 Amp Circuit Breaker

LH26400AC - 400 Amp Circuit Breaker

The LH26400AC is a 400A, 2-pole molded-case circuit breaker designed for your compatible I-Line electrical distribution equipment. It uses thermal-magnetic protection, with thermal sensing for overload conditions and magnetic sensing for short-circuit conditions in each pole. The breaker is rated for 600VAC and has an interrupting rating of 25 kA at 600VAC and 50 kA at 250VDC. What really matters in replacement work, though, is the complete configuration. The LH26400AC uses an I-Line connection on the line side and AL400LA lugs on the load side, has an AC phase connection, and measures approximately 6" W x 11"H x 5.84"D. Those details help distinguish an exact form, fit, and functional match from another 400A breaker that may look suitable at first glance but uses a different mounting or connection arrangement.

Key Features and Benefits

• 400A, 2-pole molded case circuit breaker for compatible electrical distribution applications
• I-Line mounting configuration for equipment designed around this specific connection system
• Thermal-magnetic trip technology provides overload and short-circuit sensing
• Rated for 600VAC
• I-Line line-side connection with load-side lugs
• AL400LA terminal identifier provides an additional reference when confirming connection compatibility
• Push-to-Trip functionality allows manual tripping without exposure to live parts
• 2,000A magnetic hold current and 4,000A magnetic tripping current
• HACR rated
• Well suited to maintenance and functional replacement when existing equipment specifically requires the LH26400AC configuration

Technical Specifications

• Catalog Number: LH26400AC
  
• Product Type: Molded Case Circuit Breaker
  
• Frame / Series: LH
  
• Rated Current: 400A
  
• Number of Poles: 2
  
• Wiring Configuration: 2-Wire
  
• Rated Voltage: 600VAC
  
• 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
  
• Phase Connection: AC
  
• Height: 11 in. (279.4 mm)
  
• Width: 6 in. (152.4 mm)
  
• Depth: 5.84 in. (148.34 mm)
  
• Circuit Breaker Application: HACR Rated
  
• Country of Origin: Mexico
  
• GTIN: 785901358725
  

Material Compliance and Certifications

Manufacturer information identifies the LH26400AC as UL Listed and CSA certified. The supplied product description also states that LH circuit breakers are IEC certified.

Where It Works Best

The LH26400AC 400A 2-pole circuit breaker is particularly relevant when servicing existing and legacy I-Line electrical distribution equipment that requires this exact breaker configuration. The key word here is exact. A 400A rating by itself isn't enough to establish compatibility.

Start with the electrical requirements. The application should call for a 400A, two-pole thermal-magnetic circuit breaker with the appropriate 600VAC rating. Available fault current and system requirements must correspond with the breaker's 25 kA interrupting rating at 600VAC. Where its DC rating is relevant to the application, manufacturer data specifies 50 kA at 250VDC.