HMCP400J5 - 400Amp Motor Circuit Protector

HMCP400J5 - 400Amp Motor Circuit Protector

When you’re replacing a motor circuit protector, getting the details right matters. The Eaton HMCP400J5 is a 400A, three-pole motor circuit protector from the Series C family, built for applications requiring a Frame J-K configuration. It has an 875–1750A magnetic trip range and is rated for a maximum of 600V AC or 250V DC. Line and load terminals are included in the specified configuration. For maintenance and replacement work, the HMCP400J5 gives electricians and facility teams a clearly defined set of specifications to match against existing equipment—rather than relying on amperage alone.

Key Features and Benefits

• 400A rating – Matches applications designed around this specific amperage requirement.
• Three-pole design – Provides the pole configuration required by compatible motor protection systems.
• 875–1750A magnetic trip range – An important specification to check when matching an existing motor circuit protector.
• Frame J-K configuration – Helps technicians quickly identify physical and application compatibility.
• Series C – Intended for equipment designed to use the corresponding Series C configuration.
• Up to 600V AC or 250V DC – Clearly stated maximum voltage ratings make system verification easier.
• Line and load terminals – Uses the specified terminal arrangement for compatible equipment.
  

Technical Specifications

• Manufacturer: Eaton
  
• Catalog Number: HMCP400J5
  
• UPC: 786679342367
  
• Product Type: Molded case circuit breaker accessory
  
• Type: Motor circuit protector
  
• Series: Series C
  
• Amperage Rating: 400 A
  
• Frame Size: Frame J-K
  
• Magnetic Trip Range: 875–1750 A
  
• Maximum Voltage: 600 V AC / 250 V DC
  
• Number of Poles: Three-pole
  
• Terminals: Line and load
  
• Height: 10.13 in
  
• Width: 5.5 in
  
• Length/Depth: 4.1 in
  
• Weight: 11.5 lb
  

Material Compliance and Certifications

The HMCP400J5 is UL Listed and CSA Certified. These certifications can be important when matching replacement components to the requirements of an existing installation. Additional compliance information should be confirmed with the manufacturer when a project or facility has specific regulatory requirements.

Compatibility is about more than finding another 400A device. Before installation, compare the complete specification set—including catalog number, frame size, magnetic trip range, voltage rating, number of poles, terminal configuration, and physical dimensions—with the existing equipment and system requirements.

Where It Works Best

The Eaton HMCP400J5 makes the most sense in motor protection applications where the existing equipment calls for a 400A, three-pole, Frame J-K Series C motor circuit protector with an 875–1750A magnetic trip range. It’s particularly useful for maintenance and replacement situations where keeping the original form, fit, and function is the priority.

For an existing installation, start with the catalog number if it’s available on the original component or equipment documentation. Then check the details that matter: 400A amperage, 600V AC/250V DC maximum voltage, three poles, Frame J-K, magnetic trip range, terminals, and dimensions. Carefully matching those specifications provides a much better basis for determining suitability than amperage alone.