MA36400 - 400 Amp Circuit Breaker

MA36400 - 400 Amp Circuit Breaker

When you're matching a breaker for an existing I-Line panelboard, the nameplate details matter. The MA36400 is a 400-amp, 3-pole MA molded case circuit breaker with thermal-magnetic operation, a 60Hz frequency rating, and a 40°C rating. Its interrupting ratings are clearly defined at 22kA at 600VAC, 30kA at 480VAC, and 42kA at 240VAC, making it easier to compare the breaker against the electrical requirements of the existing installation. Physical fit is just as important on replacement jobs. For legacy equipment that calls for these specifications and an MA-type breaker for an I-Line panelboard, the MA36400 can be considered a form, fit, and functional replacement candidate when all application requirements match. Its solid molded-case construction is built to last when properly selected, installed, and maintained.

Key Features and Benefits

• 400 Amp Rating: Matches applications requiring a 400A circuit breaker.
• 3-Pole Configuration: Built for compatible three-pole electrical systems.
• MA Type: Provides a clear series reference when matching an existing MA breaker.
• Thermal-Magnetic Operation: Uses the specified thermal-magnetic configuration for circuit protection.
• For I-Line Panelboards: Intended for compatible I-Line panelboard applications.
• 60Hz Rating: Rated for applications requiring 60Hz operation.
• 40°C Rated: Provides a defined temperature rating for application matching.

Technical Specifications

• Part Number: MA36400
  
• Type: MA
  
• Product Type: Molded Case Circuit Breaker
  
• Operation: Thermal-Magnetic
  
• Amperes: 400A
  
• Poles: 3
  
• Frequency: 60Hz
  
• Temperature Rating: 40°C
  
• Panelboard Application: I-Line panelboards
  
• A.I.C. Rating & Volts: 22k @ 600VAC; 30k @ 480VAC; 42k @ 240VAC
  
• Height: 16.0 in.
  
• Width: 9.00 in.
  
• Depth: 4.54 in.
  
• Dimensions: 9.00"W x 16.00"L x 4.54"D
  
• Approximate Shipping Weight: 47.00 lbs.
  

Material Compliance and Certifications

The available specifications for the MA36400 did not include specific agency certifications or material-compliance information. Therefore, do not assume UL, IEC, RoHS, REACH, or other certification status.

Where It Works Best

The MA36400 is best considered for existing or legacy electrical equipment that specifically calls for a 400A, 3-pole MA thermal-magnetic molded-case circuit breaker for an I-Line panelboard.