LD63B300L - 300Amp Circuit Breaker

LD63B300L - 300Amp Circuit Breaker

The LD63B300L is a 300A, 3-pole LD frame molded-case circuit breaker with a thermal-magnetic trip unit, designed for your electrical systems that require this specific combination of ratings and connections. For replacement work, the LD63B300L makes the most sense when the existing equipment calls for the same LD frame, 300A rating, three-pole configuration, voltage, interrupting capacity, lug arrangement, and dimensions.

Key Features and Benefits

• 300A, 3-pole design for compatible LD frame applications
• 600V rating for systems requiring this voltage class
• Thermal-magnetic trip unit
• TA2J6500 lugs included on both line and load sides
• Accepts 3/0 AWG–500 kcmil copper conductors
• Accepts 4/0 AWG–500 kcmil aluminum conductors
  

Technical Specifications

• Catalog Number: LD63B300L
  
• Article Number: US2\:LD63B300L
  
• Product Type: Molded Case Circuit Breaker
  
• Frame: LD
  
• Trip Type: Thermal-Magnetic
  
• Rated Current: 300A
  
• 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

The LD63B300L meets UL 489 and IEC 60947-2 standards, giving buyers documented standards information to reference when checking an existing installation's requirements.

Where It Works Best

The LD63B300L is a good fit for maintenance and replacement jobs involving equipment designed around a 300A, 3-pole LD frame molded case circuit breaker. That's especially useful with existing or legacy electrical systems, where matching the original device's electrical and physical requirements is often the main concern.