JXD63B300 - 300Amp Circuit Breaker

JXD63B300 - 300Amp Circuit Breaker

Looking for a JXD63B300 to match equipment already in service? A few details can quickly tell you whether you’re on the right track. This 300A, three-pole molded case circuit breaker is identified as Type JXD6-A and uses a non-interchangeable trip unit. The JXD63B300 is built to last, but choosing the right replacement still comes down to compatibility. Check the amperage, pole count, JXD6-A type, trip arrangement, interrupting rating, dimensions, and connections before installation.

Key Features and Benefits

• 300A, three-pole configuration gives you two of the most important replacement identifiers right away.
• Type JXD6-A makes it easier to check compatibility with existing and legacy equipment.
• The non-interchangeable trip unit is designed for applications that require this particular trip arrangement.
• Load-side lugs are included, so you know what is supplied on that side of the breaker.
• A practical choice for form, fit, and functional replacement when the complete specifications match the existing breaker.
  

Technical Specifications

• Part Number: JXD63B300
  
• 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
  
• 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 JXD63B300. UL, CSA, IEC, RoHS, REACH, or other certification status should therefore not be assumed without supporting product documentation.

Where It Works Best

The JXD63B300 is suited to compatible existing and legacy electrical equipment that calls for a 300A, three-pole JXD6-A molded-case circuit breaker with a non-interchangeable trip unit. Its published dimensions, included load-side lugs, and voltage-specific interrupting ratings give you several concrete details to compare with the breaker already in place.

Before installation, check the complete specification rather than relying on the part number or amperage alone. The JXD6-A type, three-pole arrangement, A.I.C. rating at the applicable voltage, trip configuration, dimensions, and terminal requirements should all align with the equipment's needs.