LD63B500 - 500Amp Circuit Breaker

LD63B500 - 500Amp Circuit Breaker

When you’re sourcing a replacement breaker, the useful details are the ones you can actually match to the equipment. The LD63B500 is a 500A, 3-pole molded case circuit breaker with an LD frame and thermal-magnetic trip unit. For maintaining existing or legacy electrical equipment, the LD63B500 makes sense when its ratings, dimensions, connections, and frame requirements match the breaker the system was designed to use. Properly selected and installed within its specified ratings, it’s built to last in its intended application.

Key Features and Benefits

• 500A rated current
• 3-pole configuration
• Rated for 600V
• Thermal-magnetic trip unit
• LD frame construction
• Standard 40°C breaker
• TA2J6500 lugs included on the load sides
• Accepts 3/0 AWG–500 kcmil copper conductors
• Accepts 4/0 AWG–500 kcmil aluminum conductors
• A practical form, fit, and functional replacement where the complete specifications match the existing equipment
  

Technical Specifications

• Catalog Number: LD63B500
  
• Article Number: US2:LD63B500
  
• Device Type: Molded Case Circuit Breaker (MCCB)
  
• Frame: LD
  
• Amperage: 500A
  
• Number of Poles: 3
  
• Voltage Rating: 600V
  
• Trip Type: Thermal-Magnetic
  
• AIC at 600V: 25kA
  
• AIC at 480V: 35kA
  
• Temperature Rating: 40°C
  
• 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
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• UL 489
• IEC 60947-2
• REACH Article 33: REACH information is referenced, but blanket REACH compliance should not be assumed
• WEEE: Manufacturer information references WEEE take-back obligations
  

Where It Works Best

Consider the LD63B500 when an existing application requires a 500A, 3-pole LD-frame thermal-magnetic breaker and maintaining the correct form, fit, and function is the priority.

Pay particular attention to the system voltage and available fault current. The documented interrupting rating is 25 kA at 600V and 35 kA at 480V. These ratings must match the electrical system where the breaker will be installed.