HLD63B300L - 300Amp Circuit Breaker

HLD63B300L - 300Amp Circuit Breaker

When you’re replacing a circuit breaker in existing equipment, the details matter. The Siemens HLD63B300L is a 300A, 3-pole molded case circuit breaker from the SENTRON HLD6 family, built on the LD frame and equipped with a thermal-magnetic trip unit.

Key Features and Benefits

• 300A, 3-pole design for compatible three-pole electrical distribution applications.
• Rated for operation at up to 600 VAC.
• Uses a thermal-magnetic trip unit.
• Built on the Siemens LD frame and part of the HLD6 family.
• Supplied with TA2J6500 lugs on both the line and load sides.
• Accepts 3/0 AWG to 500 kcmil copper conductors.
• Accepts 4/0 AWG to 500 kcmil aluminum conductors.
• Defined 7.5 × 11 × 4-inch dimensions help when checking physical fit in existing equipment.
• Meets UL 489 and IEC 60947-2 standards.
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HLD63B300L
  
• Article Number: US2\:HLD63B300L
  
• Product Type: Molded Case Circuit Breaker
  
• Product Family: HLD6
  
• Frame: LD
  
• Trip Type: Thermal-Magnetic
  
• Amperage: 300A
  
• Poles: 3
  
• Voltage Rating: 600 VAC
  
• Interrupting Rating at 600V: 35 kAIC
  
• Interrupting Rating at 480V: 65 kAIC
  
• Standard Temperature Rating: 40°C
  
• Line-Side Lugs: TA2J6500
  
• 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: 19.533 lb
  
• UPC: 783643008601
  
• Commodity Code: 8536200020
  
• Country of Origin: Mexico
  

Material Compliance and Certifications

The HLD63B300L meets UL 489 and IEC 60947-2 standards. These certifications are important reference points when checking whether a breaker meets the requirements of the equipment and installation where it will be used.

Manufacturer data also identifies REACH Article 33 information for this model. RoHS substance-restriction compliance information and a SCIP number are listed as unavailable in the supplied product specifications. Where project-specific environmental documentation is required, those requirements should be confirmed separately before installation.

Where It Works Best

The Siemens HLD63B300L makes the most sense for compatible electrical distribution equipment that calls for an LD-frame, 300A, 3-pole, 600V molded-case circuit breaker with a thermal-magnetic trip unit. It's particularly relevant when maintaining existing or legacy electrical equipment, with the goal of preserving the required form, fit, and function.