MDL3700L - 700 Amp Circuit Breaker

MDL3700L - 700 Amp Circuit Breaker

For an MDL3700L replacement, amperage is only one part of the match. Terminal configuration, interrupting ratings, trip design, and physical dimensions all matter. The MDL3700L is a 700 amp, 3-pole MDL thermal-magnetic circuit breaker with an interchangeable trip unit, a 40°C rating, and an HACR rating. When your electrical ratings, terminal configuration, dimensions, and application requirements agree, the MDL3700L can be considered a form, fit, and functional replacement candidate for compatible existing or legacy electrical equipment. Its solid construction is built to last when selected, installed, and maintained correctly.

Key Features and Benefits

• 700 Amp, 3-Pole Configuration: Provides the exact amperage and pole count needed when replacing an existing breaker with matching requirements.
• Thermal-Magnetic Protection: The MDL3700L uses a thermal-magnetic trip configuration as specified for this breaker.
• Interchangeable Trip Unit: The MDL3700L includes an interchangeable trip unit, so confirm this characteristic during replacement selection.
• Line and Load Terminals Included: This model includes both line and load terminals. That detail can make a meaningful difference when checking form, fit, and functional compatibility.
• 40°C Rated: The breaker is rated for 40 °C.
• HACR Rated: The supplied specifications include a HACR rating.

Technical Specifications

• Part Number: MDL3700L
  
• Product Type: Thermal-Magnetic Circuit Breaker
  
• Type: MDL
  
• Amperes: 700A
  
• 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 product information specifically identifies the MDL3700L as HACR rated. No additional certification or material-compliance information was provided for this exact catalog number.

Where It Works Best

The MDL3700L 700 amp circuit breaker suits compatible existing and legacy electrical equipment that requires its combination of 700A capacity, three poles, MDL type, thermal-magnetic operation, interchangeable trip unit, and line-and-load terminal configuration.

For replacement work, check the complete set of specifications rather than relying on amperage or the MDL designation alone. The existing application should match the required 25kAIC at 600VAC, 50kAIC at 480VAC, or 65kAIC at 240VAC rating as applicable, along with the 40°C rating, HACR rating, terminal configuration, and 8.25"W x 16.00"H x 4.06"D dimensions.