JXD63B300L - 300Amp Circuit Breaker

JXD63B300L - 300Amp Circuit Breaker

When you're looking for a JXD63B300L, amperage is only one piece of the puzzle. This 300A, three-pole molded-case circuit breaker carries the JXD6-A type designation. It uses a non-interchangeable trip unit and provides several specific details for comparison with the breaker already in place. The JXD63B300L is built to last, with the emphasis on what matters for replacement work—getting the form, fit, electrical ratings, and connection arrangement right for the equipment already in service.

Key Features and Benefits

• 300A, three-pole design provides clear identifiers when checking an existing breaker or equipment specification.
• Type JXD6-A makes it easier to confirm the required breaker configuration.
• The non-interchangeable trip unit matches applications calling for this specific trip arrangement.
• Line and load-side lugs are included so that both connection points can be checked against the existing installation.
• A practical choice for form, fit, and functional replacement in compatible existing and legacy electrical equipment.
  

Technical Specifications

• Part Number: JXD63B300L
  
• Product Type: Molded Case Circuit Breaker
  
• Type: JXD6-A
  
• Amperage: 300A
  
• Poles: 3
  
• Trip Unit: Non-interchangeable
  
• A.I.C. Rating at 240VAC: 65 kA
  
• A.I.C. Rating at 480VAC: 35 kA
  
• A.I.C. Rating at 600VAC: 25 kA
  
• Additional DC Rating: 30 kA at 250VDC for two-pole applications only; this is not a three-pole DC rating
  
• Line-Side Lugs: Included
  
• Load-Side Lugs: Included
  
• Width: 7.50 in.
  
• Height / Length: 11.00 in.
  
• Depth: 4.00 in.
  
• Overall Dimensions: 7.50 in. W × 11.00 in. L × 4.00 in. D
  
• Approximate Ship Weight: 16.00 lb
  

Material Compliance and Certifications

No specific material-compliance or certification information was provided for the JXD63B300L. UL, CSA, IEC, RoHS, REACH, and other certification or compliance status should therefore be verified separately rather than assumed.

Where It Works Best

The JXD63B300L is a good fit for compatible existing and legacy electrical equipment that specifically calls for a 300A, three-pole JXD6-A molded case circuit breaker with a non-interchangeable trip unit. Because both line- and load-side lugs are included, connection style is another useful detail to compare when identifying the correct replacement.