LD3400L - 400Amp Circuit Breaker

LD3400L - 400Amp Circuit Breaker

The LD3400L is a 400-amp, 3-pole Type LD thermal-magnetic circuit breaker with an interchangeable trip unit, built to make replacement matching straightforward. For maintenance teams, electricians, and facilities working with your compatible existing or legacy electrical equipment, select the LD3400L by matching the full set of electrical and physical specifications—not amperage alone.

Key Features and Benefits

• 400A rating for applications requiring this specific current rating
• 3-pole Type LD configuration
• Thermal-magnetic circuit breaker
• Interchangeable trip unit configuration
• Rated for 40°C
• Includes both line and load terminals
• Well suited to form, fit, and functional replacement applications where the existing equipment calls for the LD3400L specifications
  

Technical Specifications

• Part Number: LD3400L
  
• Type: LD
  
• Breaker Type: Thermal-magnetic circuit breaker
  
• Trip Unit: Interchangeable
  
• Amperage: 400A
  
• Poles: 3
  
• 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
  
• Height: 10.75 in.
  
• Width: 8.25 in.
  
• Depth: 4.06 in.
  
• Overall Dimensions: 8.25"W x 10.75"H x 4.06"D
  
• Approximate Ship Weight: 24 lbs.
  

Material Compliance and Certifications

The supplied specifications identify the LD3400L as HACR rated. No specific UL, CSA, IEC, RoHS, REACH, or other material-compliance or certification information was provided, so do not assume additional listings or certifications.

Where It Works Best

The LD3400L is a sensible fit for compatible existing and legacy electrical equipment designed around a 400A, 3-pole Type LD thermal-magnetic breaker. Because this model includes both line and load terminals, make sure the connection arrangement matches the installation.

For electrical compatibility, work through the system requirements carefully. At 600VAC, the specified interrupting rating is 25kA; at 480VAC, it's 35kA; and at 240VAC, it's 65kA.