HLD63B450 - 450Amp Circuit Breaker

HLD63B450 - 450Amp Circuit Breaker

The Siemens HLD63B450 is a 450-amp, 3-pole molded case circuit breaker from the SENTRON LD-frame family. It uses a thermal-magnetic trip unit and is rated for 600 VAC, with an interrupting rating of 35 kAIC at 600V and 65 kAIC at 480V. For replacement work, those details matter. So do the connections: the breaker comes with TA2J6500 load-side lugs that accept 3/0 AWG through 500 kcmil copper wire or 4/0 AWG through 500 kcmil aluminum wire. The HLD63B450 measures 7.5" W × 11" H × 4" D, making its physical dimensions easy to check against an existing installation. It also meets UL 489 and IEC 60947-2 standards. If you're replacing an existing HLD63B450, matching the catalog number is a good starting point, but you'll also want to confirm the frame, amperage, voltage, pole count, interrupting rating, trip type, lug arrangement, and dimensions.

Key Features and Benefits

• 450A, 3-pole configuration for compatible three-phase applications.
• Rated for operation at 600 VAC.
• Thermal-magnetic trip unit in a standard 40°C LD-frame design.
• Includes TA2J6500 load-side lugs.
• Handles 3/0 AWG to 500 kcmil copper conductors.
• Handles 4/0 AWG to 500 kcmil aluminum conductors.
• Meets UL 489 and IEC 60947-2 standards.
• Known dimensions make it easier to check form and fit when replacing an existing breaker.
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HLD63B450
  
• Article Number: US2\:HLD63B450
  
• Product Family: HLD6
  
• Type: SENTRON Molded Case Circuit Breaker
  
• Frame: LD
  
• Trip Unit: Thermal-Magnetic
  
• Standard Temperature Rating: 40°C
  
• Amperage: 450A
  
• Poles: 3
  
• Voltage: 600 VAC
  
• Interrupting Rating: 35 kAIC at 600V
  
• Interrupting Rating at 480V: 65 kAIC
  
• Load-Side Lugs: TA2J6500
  
• Copper Wire Range: 3/0 AWG–500 kcmil
  
• Aluminum Wire Range: 4/0 AWG–500 kcmil
  
• Dimensions: 7.5" W × 11" H × 4" D
  
• Net Weight: 20.9 lb
  
• UPC: 783643214071
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The HLD63B450 meets UL 489 and IEC 60947-2 standards, giving installers and maintenance teams clearly documented standards information when checking the breaker against application requirements.

Manufacturer data also includes REACH Article 33 information. RoHS substance-restriction compliance information and a SCIP number are listed as unavailable in the supplied specifications.

Where It Works Best

The Siemens HLD63B450 is a natural fit for existing electrical distribution equipment that calls for this particular 450A, 3-pole, 600V LD-frame breaker configuration. It's especially relevant for maintenance and replacement projects where keeping the correct form, fit, and electrical function is the priority.