LD63T450 - 450Amp Trip Unit

LD63T450 - 450Amp Trip Unit

The LD63T450 is a 450A, 3-pole thermal-magnetic trip unit made for use with an LD frame. The key thing to know here is that this catalog number is listed as "TU ONLY"—it is a trip unit, not a complete molded case circuit breaker. For anyone replacing a component in your existing equipment, an exact match is especially important. When the catalog number, LD frame, electrical ratings, and equipment requirements align, the LD63T450 can serve as a form, fit, and functional replacement for the intended application. Properly selected, installed, and used within its specified ratings, it's built to last in its intended application.

Key Features and Benefits

• 450A, 3-pole configuration
• Thermal-magnetic trip unit for an LD frame
• Rated for 600V
• Specifically identified as TU ONLY
• Manufacturer documentation references TA2J6500 line- and load-side lugs
• Referenced conductor range: 3/0 AWG–500 kcmil copper
• Referenced conductor range: 4/0 AWG–500 kcmil aluminum
• Clear catalog, frame, and electrical specifications make it easier to check against an existing application
  

Technical Specifications

• Catalog Number: LD63T450
  
• Article Number: US2:LD63T450
  
• Product Type: Trip Unit Only (TU Only)
  
• Trip Technology: Thermal-Magnetic
  
• Frame: LD
  
• Amperage: 450A
  
• Poles: 3
  
• Voltage Rating: 600V
  
• Interrupting Rating: 25kA at 600V
  
• Interrupting Rating: 35kA at 480V
  
• Dimensions: 7.5"W x 11"H x 4"D
  
• Net Weight: 2.599 lb
  
• Referenced Lug Type: TA2J6500, line and load side
  
• Copper Conductor Range: 3/0 AWG–500 kcmil
  
• Aluminum Conductor Range: 4/0 AWG–500 kcmil
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

• Meets UL 489
• Meets IEC 60947-2
• RoHS: Manufacturer information lists substance-restriction compliance since July 14, 2008
• REACH: Article 33 information is referenced; this does not by itself establish blanket REACH compliance
• WEEE: Manufacturer documentation references WEEE take-back obligations
  

Where It Works Best

The LD63T450 makes sense for existing electrical equipment that specifically requires a 450A, 3-pole thermal-magnetic trip unit for an LD frame. This isn't a case where matching the amp rating alone is enough. The 600V rating, 25kA rating at 600V, 35kA rating at 480V, three-pole configuration, and LD frame compatibility must all match the application.

Also check the connection information carefully. The manufacturer data references TA2J6500 line- and load-side lugs and their associated copper and aluminum conductor ranges, but the product itself is labeled TU ONLY. Confirm what is physically included with the LD63T450 and what must already be present in the breaker assembly.