LD63B450L - 450Amp Circuit Breaker

LD63B450L - 450Amp Circuit Breaker

When you're matching a 450A LD-frame breaker to existing equipment, the LD63B450L gives you a useful set of clearly documented electrical and connection specifications to work with. Its physical size is also known—7.5 inches wide, 11 inches high, and 4 inches deep—which gives maintenance teams and electrical buyers concrete measurements to compare with the existing installation. The LD63B450L is a standard 40°C breaker and meets UL 489 and IEC 60947-2 standards.

Key Features and Benefits

• 450A rated current with a 3-pole configuration
• Rated for 600V
• Thermal-magnetic trip unit
• LD frame molded case circuit breaker
• Standard 40°C breaker
• TA2J6500 line-side lugs included
• TA2J6500 load-side lugs included
• Accepts 3/0 AWG–500 kcmil copper conductors
• Accepts 4/0 AWG–500 kcmil aluminum conductors
• Useful for form, fit, and functional replacement when the existing equipment requires these exact specifications
  

Technical Specifications

• Catalog Number: LD63B450L
  
• Article Number: US2:LD63B450L
  
• Product Type: Molded Case Circuit Breaker (MCCB)
  
• Frame: LD
  
• Trip Unit: Thermal-Magnetic
  
• Rated Current: 450A
  
• Number of Poles: 3
  
• Voltage Rating: 600V
  
• Interrupting Capacity at 600V: 25kA
  
• Interrupting Capacity at 480V: 35kA
  
• Temperature Rating: 40°C
  
• Line-Side Lugs: TA2J6500, included
  
• Load-Side Lugs: TA2J6500, included
  
• Copper Wire Range: 3/0 AWG–500 kcmil
  
• Aluminum Wire Range: 4/0 AWG–500 kcmil
  
• Dimensions: 7.5"W x 11"H x 4"D
  
• Net Weight: 19.533 lb
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• UL 489
• IEC 60947-2
• REACH: Manufacturer documentation references information provided under REACH Article 33; this should not be interpreted as blanket REACH compliance
• WEEE: Manufacturer documentation references WEEE (2012/19/EU) take-back obligations
  

Where It Works Best

The LD63B450L makes the most sense when you're servicing equipment that requires a 450A, 3-pole, 600V LD-frame molded case circuit breaker with a thermal-magnetic trip unit. This is especially relevant for existing and legacy installations where maintaining the required form, fit, and electrical function matters more than changing the surrounding equipment.

Pay close attention to the interrupting rating for the system voltage. The LD63B450L is specified at 25kA at 600V and 35kA at 480V. The rating used for the application must match the available fault current and the equipment's requirements.