MDL3450L - 450 Amp Circuit Breaker

MDL3450L - 450 Amp Circuit Breaker

The MDL3450L is a 450 amp, 3-pole MDL thermal-magnetic circuit breaker with an interchangeable trip unit, built around the specifications that matter when matching a breaker to your existing electrical equipment. For legacy equipment calling for the same MDL configuration, ratings, dimensions, and terminal arrangement, the MDL3450L can be evaluated as a form, fit, and functional replacement. Its solid construction is built to last when the breaker is selected, installed, and maintained correctly.

Key Features and Benefits

• 450A, 3-Pole Configuration: Clearly defined electrical specifications make it easier to compare the MDL3450L with the breaker being replaced.
• Thermal-Magnetic Circuit Breaker: Uses the specified thermal-magnetic trip design for its intended electrical application.
• Interchangeable Trip Unit: The MDL3450L is configured with an interchangeable trip unit, which is important when identifying the correct replacement.
• Line and Load Terminals Included: This configuration includes both line-side and load-side terminals. Terminal material and conductor range were not provided and should be verified separately, as needed.
• 40°C Rated: The specified 40°C rating provides another concrete point for matching the breaker to the intended application.
• HACR Rated: The available product information specifically identifies the HACR rating.

Technical Specifications

• Part Number: MDL3450L
  
• Product Type: Thermal-Magnetic Circuit Breaker
  
• Type: MDL
  
• Amperes: 450A
  
• Poles: 3
  
• A.I.C. Rating at 600VAC: 25kAIC
  
• A.I.C. Rating at 480VAC: 50kAIC
  
• A.I.C. Rating at 240VAC: 65kAIC
  
• Trip Type: Thermal-Magnetic
  
• Trip Unit: Interchangeable
  
• Temperature Rating: 40°C
  
• HACR Rated: Yes
  
• Included Terminals: Line and load terminals
  
• Height: 16.00 in.
  
• Width: 8.25 in.
  
• Depth: 4.06 in.
  
• Dimensions: 8.25"W x 16.00"H x 4.06"D
  
• Approx. Ship Weight: 35.00 lbs.
  

Material Compliance and Certifications

The supplied specifications identify the MDL3450L as HACR-rated. No additional certification or material-compliance information was provided for this exact catalog number. For that reason, do not assume UL, IEC, RoHS, REACH, or other certification status based on similar MDL products. If a particular approval or material-compliance requirement applies to the installation, verify it specifically for the MDL3450L.

Where It Works Best

The MDL3450L 450 amp circuit breaker suits compatible existing and legacy electrical equipment requiring a 450A, 3-pole MDL thermal-magnetic breaker with an interchangeable trip unit. For replacement work, check more than the part number alone. The applicable voltage and AIC rating, 40°C rating, HACR rating, physical dimensions, and terminal configuration should match the requirements of the existing equipment.