LD3450L - 450Amp Circuit Breaker

LD3450L - 450Amp Circuit Breaker

The LD3450L is a 450-amp, 3-pole Type LD thermal-magnetic circuit breaker with an interchangeable trip unit. It comes with both line and load terminals and is rated for operation at 40°C. If you're matching a breaker for equipment already in service, check the electrical ratings closely: 25kA at 600VAC, 35kA at 480VAC, and 65kA at 240VAC. It's also HACR rated. Properly matched to the application, installed correctly, and kept within its specified ratings, it's built to last for the job it was designed to do.

Key Features and Benefits

• 450A, 3-pole configuration for applications requiring these specific ratings
• Type LD thermal-magnetic design
• Interchangeable trip unit as specified for this breaker
• 40°C rated
• Line and load terminals included
• Clearly defined dimensions make it easier to check physical compatibility
  

Technical Specifications

• Part Number: LD3450L
  
• Type: LD
  
• Amperage: 450A
  
• Poles: 3
  
• Breaker Type: Thermal-magnetic
  
• Trip Unit: Interchangeable
  
• AIC at 600VAC: 25kA
  
• AIC at 480VAC: 35kA
  
• AIC at 240VAC: 65kA
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Terminals: Line and load terminals included
  
• Dimensions: 8.25"W x 10.75"H x 4.06"D
  
• Height: 10.75 in.
  
• Width: 8.25 in.
  
• Depth: 4.06 in.
  
• Approximate Ship Weight: 24 lbs.
  

Material Compliance and Certifications

The available specifications identify the LD3450L as HACR-rated. No specific UL, CSA, IEC, RoHS, REACH, or other certification or material-compliance details were provided, so do not assume them.

Where It Works Best

The LD3450L makes the most sense in compatible existing and legacy equipment that requires a 450A, 3-pole Type LD breaker. For replacement work, focus on the electrical and physical details rather than amperage alone.

Check the required system voltage against the appropriate interrupting rating—25kA at 600VAC, 35kA at 480VAC, or 65kA at 240VAC. From there, confirm the Type LD configuration and interchangeable trip-unit requirements.