HLXD63B300L - 300Amp Circuit Breaker

HLXD63B300L - 300Amp Circuit Breaker

Finding the right breaker for existing equipment often comes down to the details. The HLXD63B300L is a 300-amp, 3-pole HLD6-A molded-case circuit breaker with a non-interchangeable trip unit. It comes with both line- and load-side lugs, an important detail when matching a replacement to an existing installation. It’s a practical choice when the job calls for maintaining the original form, fit, and function of legacy electrical equipment rather than changing the surrounding system. Simply put, if your equipment calls for this particular breaker configuration, matching the full part number, ratings, dimensions, and lug setup can save a lot of guesswork.

Key Features and Benefits

• 300A, 3-pole configuration – Matches applications designed around a 300 amp, three-pole breaker.
• HLD6-A type – Provides an important reference point when checking compatibility with existing electrical equipment.
• Line and load-side lugs included – Both are supplied with this configuration, so it’s worth checking the complete part number when replacing an existing breaker.
• Non-interchangeable trip unit – Part of the specified HLXD63B300L breaker configuration.
• Known physical dimensions – The 7.50"W x 11.00"L x 4.00" D size makes it easier to compare the breaker with the unit being replaced.
• Well suited to replacement work – A sensible fit for legacy systems that specifically call for this breaker type, ratings, and physical configuration.
  

Technical Specifications

• Part Number: HLXD63B300L
  
• Product Type: Molded Case Circuit Breaker
  
• Type: HLD6-A
  
• Amperage: 300A
  
• Poles: 3
  
• A.I.C. @ 600VAC: 35 kAIC
  
• A.I.C. @ 480VAC: 65 kAIC
  
• A.I.C. @ 240VAC: 100 kAIC
  
• DC Rating: 30 kAIC @ 250VDC for 2-pole applications
  
• Trip Unit: Non-interchangeable
  
• Line-Side Lugs: Included
  
• Load-Side Lugs: Included
  
• Height: 11.0 in.
  
• Width: 7.5 in.
  
• Depth: 4.0 in.
  
• Dimensions: 7.50"W x 11.00"L x 4.00"D
  
• Approx. Shipping Weight: 18.00 lbs.
  

Material Compliance and Certifications

Specific material-compliance information and certifications were not included in the supplied specifications for the HLXD63B300L. Because these details can matter for code compliance and particular installations, they should be verified using the breaker labeling or applicable technical documentation rather than assumed.

Installation and application should be handled by qualified electrical personnel and should comply with applicable electrical codes and the requirements of the equipment in which the breaker is installed.

Where It Works Best

The HLXD63B300L makes the most sense for existing or legacy electrical systems that require its specific HLD6-A configuration. It is especially relevant for maintenance and replacement jobs where the objective is to preserve the original equipment setup and match the required breaker as closely as possible.

Before using it as a replacement, check more than amperage alone. Confirm the HLXD63B300L part number, 300A rating, three poles, voltage and A.I.C. requirements, physical dimensions, trip-unit configuration, and lug arrangement against the breaker being replaced and the requirements of the equipment.