HLXD63B350 - 350Amp Circuit Breaker

HLXD63B350 - 350Amp Circuit Breaker

The HLXD63B350 is a 350-amp, 3-pole molded-case circuit breaker designed for your electrical systems that already use the HLD6-A frame style. In most cases, it’s selected for replacement work where the goal is simple—match the existing breaker’s form, fit, and electrical ratings so the system stays consistent and reliable.

Inside, it uses a non-interchangeable trip unit, meaning the trip function is built into the breaker assembly. That’s important in applications where the original equipment was designed around this exact configuration and shouldn’t be altered.

Key Features and Benefits

• 350 Amp, 3-pole molded case circuit breaker
• Designed for HLD6-A frame applications
• Rated up to 600VAC systems
• Non-interchangeable trip unit for fixed configuration use
• Includes load-side lugs
• Suitable for 250VDC 2-pole applications (30kAIC)
• Built for replacement work in existing electrical systems
• Dimensions support straightforward form-and-fit matching
  

Technical Specifications

• Catalog Number: HLXD63B350
  
• Product Type: Molded Case Circuit Breaker
  
• Type: HLD6-A
  
• Amperage Rating: 350 Amps
  
• Poles: 3
  
• Maximum Voltage Rating: 600VAC
  
• Interrupt Rating (600VAC): 35kAIC
  
• Interrupt Rating (480VAC): 65kAIC
  
• Interrupt Rating (240VAC): 100kAIC
  
• DC Interrupt Rating: 30kAIC at 250VDC (2-pole applications)
  
• Trip Unit: Non-interchangeable
  
• Lugs: Load-side lugs included
  
• Width: 7.50 in.
  
• Height: 11.00 in.
  
• Depth: 4.00 in.
  
• Dimensions: 7.50" W x 11.00" H x 4.00" D
  
• Approximate Shipping Weight: 18.00 lbs
  

Material Compliance and Certifications

The HLXD63B350 should be used in accordance with the requirements of the existing electrical system, including voltage rating, amperage, interrupting capacity, pole configuration, and physical fit. Any applicable certifications or compliance details should be confirmed through manufacturer documentation or equipment labeling before installation.

Where It Works Best

• Existing systems requiring an HLXD63B350 replacement breaker
• Electrical distribution equipment using the HLD6-A frame type
• 350A, 3-pole applications in commercial or industrial settings
• Systems operating up to 600VAC
• 480VAC and 240VAC distribution systems within listed interrupt ratings
• 250VDC 2-pole applications where 30kAIC is required
• Maintenance and repair work focused on matching existing breaker specifications
• Installations where load-side lugs are required for conductor connection