HMDL3450 - 450Amp Circuit Breaker

HMDL3450 - 450Amp Circuit Breaker

When you're replacing a circuit breaker in existing equipment, getting the details right matters. The Eaton HMDL3450 is a 450A, three-pole molded case circuit breaker from the Series C family, built on the MDL frame and supplied as a complete breaker. It uses a T186 trip type and is rated for operation at 50–60 Hz. Its interrupting ratings are 100 kAIC at 240 VAC and 65 kAIC at 480 VAC. Those specifications make the HMDL3450 useful for maintenance and replacement situations where existing equipment calls for this particular breaker configuration.

Key Features and Benefits

• 450A Rating: Designed for applications requiring a 450-amp molded case circuit breaker.
• Three-pole design: Matches equipment requiring a three-pole breaker configuration.
• Series C construction: Part of Eaton's Series C molded case circuit breaker family.
• HMDL / MDL configuration: HMDL breaker type built around the MDL frame.
• T186 trip type: An important detail when matching the breaker to an existing application.
• 50–60 Hz operation: Suitable for compatible electrical systems operating within this frequency range.
  

Technical Specifications

• Catalog Number: HMDL3450
  
• Manufacturer: Eaton
  
• Product Type: Molded case circuit breaker
  
• Series: Series C
  
• Circuit Breaker Type: HMDL
  
• Frame: MDL
  
• Circuit Breaker Frame Type: Complete breaker
  
• Amperage Rating: 450 A
  
• Number of Poles: Three-pole
  
• Trip Type: T186
  
• Frequency Rating: 50–60 Hz
  
• Terminal: Includes load side
  
• Interrupt Rating at 240 VAC: 100 kAIC
  
• Interrupt Rating at 480 VAC: 65 kAIC
  
• UPC: 782114586044
  
• Certification: UL Listed
  

Material Compliance and Certifications

The Eaton HMDL3450 is UL Listed, an important consideration when you're matching a replacement breaker to the requirements of an existing installation.

The supplied manufacturer information does not identify additional material-compliance certifications for this catalog number, so none are assumed here. For applications with project-specific environmental or material requirements, those requirements should be checked separately.

Where It Works Best

The HMDL3450 makes the most sense in existing electrical distribution equipment that calls for an Eaton Series C HMDL breaker with an MDL frame. It's especially relevant when you're replacing a breaker and need to maintain the required form, fit, and electrical function rather than change the equipment configuration.