JXD63B400 - 400Amp Circuit Breaker

JXD63B400 - 400Amp Circuit Breaker

If you're considering the JXD63B400 as a replacement for equipment already in service, there are a few details you'll want to review closely. This is a 400A, three-pole molded-case circuit breaker identified as Type JXD6-A, with a non-interchangeable trip unit and load-side lugs. The JXD63B400 is built to last, but choosing the right replacement still comes down to the basics: matching the part type, amperage, poles, trip arrangement, interrupting ratings, dimensions, and connections required by the existing equipment.

Key Features and Benefits

• 400A, three-pole design gives you two of the most important specifications to confirm when identifying a replacement.
• Type JXD6-A provides a specific compatibility reference for existing electrical equipment.
• Uses a non-interchangeable trip unit, an important detail when matching the original breaker configuration.
• Load-side lugs are included, so there's no guesswork about the supplied load-side connection.
• A practical choice for compatible existing and legacy systems that call for the same form, fit, electrical ratings, and functionality.
  

Technical Specifications

• Part Number: JXD63B400
  
• Product Type: Molded Case Circuit Breaker
  
• Type: JXD6-A
  
• Amperage: 400A
  
• 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 JXD63B400. UL, CSA, IEC, RoHS, REACH, and other certification or compliance statuses should not be assumed from the available specifications. If your installation requires a particular certification or standard, verify that requirement against the applicable product documentation.

Where It Works Best

The JXD63B400 is best suited to compatible existing and legacy electrical equipment that calls for a 400A, three-pole JXD6-A molded case circuit breaker with a non-interchangeable trip unit. The included load-side lugs are another useful detail to compare with the breaker currently installed.

When you're checking compatibility, don't stop at the 400A rating. Look at the complete combination: JXD6-A type, three poles, A.I.C. ratings at the required voltage, trip-unit arrangement, dimensions, and connection requirements. Matching those details is the practical way to determine whether the JXD63B400 provides the form, fit, and function your existing equipment requires.