LD3400 - 400Amp Circuit Breaker

LD3400 - 400Amp Circuit Breaker

The LD3400 is a 400-amp, 3-pole Type LD thermal-magnetic circuit breaker with an interchangeable trip unit. For maintenance and replacement work, it gives you several clear specifications to match against the breaker already in service: amperage, pole count, interrupting capacity, dimensions, and trip-unit configuration. When properly selected, installed, and operated within its specified ratings and intended application, it's built to last for the job it was designed to do.

Key Features and Benefits

• 400A, 3-pole Type LD configuration
• Thermal-magnetic circuit breaker
• Uses an interchangeable trip unit
• 40°C rated
• HACR rated
• Load terminals included
• A practical replacement choice when the application specifically calls for the LD3400 configuration
  

Technical Specifications

• Part Number: LD3400
  
• Type: LD
  
• Amperage: 400A
  
• Number of Poles: 3
  
• Trip 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
  
• Load Terminals: Included
  
• Height: 10.75 in.
  
• Width: 8.25 in.
  
• Depth: 4.06 in.
  
• Dimensions: 8.25"W x 10.75"H x 4.06"D
  
• Approximate Ship Weight: 24 lbs.
  

Material Compliance and Certifications

The information provided for the LD3400 specifically identifies it 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 LD3400 makes the most sense when you're maintaining compatible equipment that already calls for a 400A, 3-pole Type LD breaker. This can be especially useful for existing and legacy electrical systems where maintaining the required physical and electrical configuration matters.