LDC3400L - 400 Amp Circuit Breaker

LDC3400L - 400 Amp Circuit Breaker

The LDC3400L gives you quite a few specifics to work with when you’re trying to match a breaker already in service. It’s rated at 400A, has three poles, and uses a thermal-magnetic design with an interchangeable trip unit. The breaker measures 8.25"W × 10.75"H × 4.06"D—an important check when the equipment, enclosure, and mounting space are already established. In other words, matching an LDC3400L isn’t about finding another 400A breaker. It’s about getting the whole combination right: type, poles, trip arrangement, terminals, ratings, and dimensions. When properly matched, installed, and maintained to spec, the LDC3400L is built to last.

Key Features and Benefits

• 400A, three-pole setup: Start here when comparing the LDC3400L with the breaker currently in the equipment.
• Type LDC: A key part of identifying the correct form, fit, and functional match.
• Interchangeable trip unit: This is part of the breaker’s specified configuration, so it deserves its own place on the compatibility checklist.
• Thermal-magnetic protection: Uses the stated thermal-magnetic breaker design.
• Line and load terminals included: Both terminal sides are supplied, making it easier to compare the connection arrangement before installation.
• 40°C rated: Another specification that needs to align with the intended application.
• HACR rated: Useful to know where the equipment requires an HACR-rated breaker.

Technical Specifications

• Part Number: LDC3400L
  
• Product Type: Thermal-Magnetic Circuit Breaker
  
• Type: LDC
  
• Amperage: 400A
  
• Poles: 3
  
• Protection Type: Thermal-Magnetic
  
• Trip Unit: Interchangeable
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• A.I.C. at 240VAC: 200 kA
  
• A.I.C. at 480VAC: 100 kA
  
• A.I.C. at 600VAC: 50 kA
  
• Line Terminals: Included
  
• Load Terminals: Included
  
• Width: 8.25 in.
  
• Height: 10.75 in.
  
• Depth: 4.06 in.
  
• Overall Dimensions: 8.25" W × 10.75" H × 4.06"D
  
• Approximate Shipping Weight: 24.00 lbs.
  

Material Compliance and Certifications

The information provided for the LDC3400L states that it is HACR rated. No specific UL, CSA, IEC, RoHS, REACH, or other certification or material-compliance information was supplied for this exact part number.

Where It Works Best

The LDC3400L 400A 3-pole circuit breaker is intended for compatible existing and legacy electrical equipment where its Type LDC configuration matches what the application requires. The interchangeable trip unit and included line and load terminals are particularly useful identification points when you have the existing breaker available for comparison.