MDL3500L - 500 Amp Circuit Breaker

MDL3500L - 500 Amp Circuit Breaker

Finding the right replacement breaker comes down to matching the details that actually matter. The MDL3500L is a 500 amp, 3-pole MDL thermal-magnetic circuit breaker with an interchangeable trip unit, a 40°C rating, and an HACR rating. This configuration includes both line and load terminals, which matters when you're comparing it with an existing breaker. For legacy replacement applications where the catalog number, electrical ratings, dimensions, trip configuration, and terminal arrangement match, the MDL3500L can be considered a form, fit, and functional replacement candidate. Its solid construction is built to last when the breaker is selected, installed, and maintained correctly.

Key Features and Benefits

• 500 Amp, 3-Pole Configuration: Clearly defined electrical characteristics make it easier to compare the MDL3500L with an existing breaker and application requirements.
• Thermal-Magnetic Design: Uses the specified thermal-magnetic circuit breaker configuration.
• Interchangeable Trip Unit: The interchangeable trip unit is an important characteristic to match when replacing an existing MDL breaker.
• Line and Load Terminals Included: This configuration includes both line and load terminals, reducing uncertainty when checking the required terminal arrangement.
• 40°C Rated: The specified 40°C rating provides another application detail to compare with the existing installation.
• HACR Rated: The HACR rating is specifically identified for the MDL3500L.

Technical Specifications

• Part Number: MDL3500L
  
• Product Type: Thermal-Magnetic Circuit Breaker
  
• Type: MDL
  
• Amperes: 500A
  
• 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 specifically identify the MDL3500L as HACR rated. No additional certification or material-compliance information was provided for this exact catalog number.

Where It Works Best

The MDL3500L 500 amp circuit breaker is best for compatible existing and legacy electrical equipment that requires a 3-pole MDL thermal-magnetic breaker with an interchangeable trip unit. Replacement work is where the details matter most: check the catalog number, amperage, pole count, voltage, AIC rating, trip configuration, terminal arrangement, and physical dimensions against the existing application.

One detail worth noticing is the terminal configuration. The MDL3500L includes both line and load terminals. This helps distinguish this configuration from MDL breakers supplied with a different terminal arrangement.