HLD63B300 - 300Amp Circuit Breaker

HLD63B300 - 300Amp Circuit Breaker

When you’re replacing a circuit breaker, the details matter. The Siemens HLD63B300 is a 300-amp, 3-pole molded case circuit breaker in the SENTRON HLD6 family, built on the LD frame and equipped with a thermal-magnetic trip unit. For maintenance, repair, or replacement work involving compatible Siemens LD-frame equipment, this breaker provides the specific form, fit, ratings, and functionality required by the application. Simply put, it's a purpose-built electrical component made to do its job and built to last.

Key Features and Benefits

• 300A, 3-pole configuration for electrical systems designed around these specific requirements.
• Rated for operation at up to 600 VAC.
• Thermal-magnetic trip unit provides the trip characteristics specified for the HLD63B300.
• Built on the LD frame as part of the SENTRON HLD6 family.
• Standard 40°C breaker configuration.
• Includes TA2J6500 lugs on load sides.
• Accepts a broad conductor range: 3/0 AWG–500 kcmil copper and 4/0 AWG–500 kcmil aluminum.
• Meets UL 489 and IEC 60947-2 standards.
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HLD63B300
  
• Article Number: US2\:HLD63B300
  
• Breaker Type: Molded Case Circuit Breaker
  
• Product Family: HLD6
  
• Frame: LD
  
• Trip Type: Thermal-Magnetic
  
• Amperage: 300A
  
• Poles: 3
  
• Voltage Rating: 600 VAC
  
• Interrupting Capacity at 600V: 35 kAIC
  
• Interrupting Capacity at 480V: 65 kAIC
  
• Temperature Rating/Configuration: Standard 40°C
  
• Load-Side Lugs: TA2J6500
  
• Copper Conductor Range: 3/0 AWG–500 kcmil
  
• Aluminum Conductor Range: 4/0 AWG–500 kcmil
  
• Dimensions (W × H × D): 7.5 × 11 × 4 in.
  
• Net Weight: 20.79 lb
  
• UPC: 783643214040
  
• Commodity Code: 85362090
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The HLD63B300 meets UL 489 and IEC 60947-2 standards, two important references when confirming whether a breaker is appropriate for a particular electrical installation.

Where It Works Best

The Siemens HLD63B300 makes sense where the existing equipment calls for a 300A, 3-pole LD-frame molded-case circuit breaker with a thermal-magnetic trip unit, a 600 VAC rating, and the corresponding interrupting capacity. It can be particularly relevant for maintenance and replacement work on compatible electrical distribution equipment, where maintaining the correct frame, dimensions, connections, and electrical ratings is essential.