MH36300 - 300 Amp Circuit Breaker

MH36300 - 300 Amp Circuit Breaker

The MH36300 is a 300 amp, 3-pole thermal magnetic molded case circuit breaker for compatible I-Line panelboards. If you’re replacing a breaker in existing or legacy equipment, the useful question isn’t simply whether the amperage matches. The MH type, three-pole configuration, physical dimensions, interrupting ratings, frequency, and panelboard application must match the equipment already in place. For maintenance and replacement projects, these specifications make it easier to evaluate the MH36300 as a form-, fit-, and function-replacement candidate. Its solid molded-case construction is built to last when the breaker is selected, installed, and maintained correctly.

Key Features and Benefits

• 300 Amp Rating: Clearly rated at 300A for applications that require this exact current rating.
• 3-Pole Configuration: Three-pole construction provides another essential match point when replacing an existing MH circuit breaker.
• Made for I-Line Panelboards: The MH36300 is specifically identified for use with compatible I-Line panelboards, helping narrow the fit and application requirements.
• Thermal-Magnetic Circuit Breaker: Uses the supplied thermal-magnetic trip configuration for circuit protection.
• 60Hz Rating: Intended for electrical systems requiring the specified 60Hz frequency.
• 40°C Rated: The supplied 40°C rating is another specification to confirm when matching the breaker to the application.

Technical Specifications

• Catalog / Part Number: MH36300
  
• Type: MH
  
• Product Type: Thermal Magnetic Molded Case Circuit Breaker
  
• Panelboard Application: I-Line Panelboards
  
• Amperage: 300A
  
• Number of Poles: 3
  
• A.I.C. Rating at 600VAC: 25k
  
• A.I.C. Rating at 480VAC: 65k
  
• A.I.C. Rating at 240VAC: 65k
  
• Frequency: 60Hz
  
• Temperature Rating: 40°C
  
• Dimensions: 9.00"W x 16.00"L x 4.54"D
  
• Height: 16.00 in.
  
• Width: 9.0 in.
  
• Depth: 4.54 in.
  
• Approximate Shipping Weight: 45.00 lbs.
  

Material Compliance and Certifications

The supplied specifications for the MH36300 included no specific UL, CSA, IEC, RoHS, REACH, HACR, or other certification/compliance information. Because this is electrical protection equipment, do not assume those certifications based on the product family, breaker type, or specifications of similar models.

Where It Works Best

The MH36300 300A circuit breaker is best considered for existing or legacy I-Line panelboard applications where the equipment specifically calls for its MH type, 300 amp rating, three poles, thermal-magnetic configuration, 60Hz frequency, 40°C rating, and physical size.

Interrupting capacity also deserves a careful check. The supplied ratings are 25 kA at 600VAC, 65 kA at 480VAC, and 65 kA at 240VAC. Evaluate the appropriate rating at the actual system voltage and against the available fault current for the installation.