JXD63B400L - 400Amp Circuit Breaker

JXD63B400L - 400Amp Circuit Breaker

Shopping for a replacement JXD63B400L? A few details can tell you pretty quickly whether you're looking at the right breaker. This model is rated 400 amps, has three poles, and carries the JXD6-A type designation. The JXD63B400L is built to last, but choosing the right replacement still comes down to compatibility. Check the type, amperage, poles, trip arrangement, lugs, dimensions, and electrical ratings against the equipment already in service.

Key Features and Benefits

• 400A, three-pole configuration gives you two of the first specifications to check when identifying a replacement.
• Type JXD6-A provides an important compatibility reference for existing and legacy equipment.
• Non-interchangeable trip unit matches installations calling for this particular trip arrangement.
• Line-side and load-side lugs are included, so the connection setup is clearly defined.
• Useful for form, fit, and functional replacement where the existing equipment requires these same specifications.
  

Technical Specifications

• Part Number: JXD63B400L
  
• 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
  
• 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 JXD63B400L. UL, CSA, IEC, RoHS, REACH, and other certification or compliance statuses should not be assumed from the available specifications. If your installation has a particular compliance requirement, confirm it against the applicable product documentation.

Where It Works Best

The JXD63B400L is a practical choice for compatible existing and legacy electrical equipment that specifically calls for a 400A, three-pole, Type JXD6-A molded case circuit breaker with a non-interchangeable trip unit. The included line and load-side lugs are another important detail when checking the breaker against an existing installation.

Before installation, compare more than the part number or amp rating. Check the JXD6-A type, three-pole arrangement, A.I.C. ratings, trip-unit configuration, lug setup, and physical dimensions. When those details line up with the equipment requirements, you have a much stronger basis for confirming the correct form, fit, and function.