HNB31000 - 1000Amp Circuit Breaker

HNB31000 - 1000Amp Circuit Breaker

The HNB31000 is a 1000-amp, three-pole thermal-magnetic molded-case circuit breaker designed for electrical distribution equipment and built to an HNB frame configuration.

When you're replacing a large-frame circuit breaker, getting the details right is critical. The amp rating is only the starting point—the frame type, trip unit style, pole configuration, voltage rating, interrupt capacity, and terminal arrangement must all match the existing equipment.

Key Features and Benefits

• 1000A current rating: Designed for systems requiring a 1000-amp molded case circuit breaker.
• Three-pole design: Fits applications requiring three-pole circuit protection.
• HNB frame configuration: Built for equipment using the HNB breaker frame style.
• Thermal-magnetic protection: Combines thermal and magnetic trip functions in a single breaker.
• Interchangeable trip unit: Allows the trip configuration to be matched to the application requirements.
• 40°C rating: Matches applications operating at the specified operating temperature.
• Load-side terminals included: Provides the specified terminal arrangement.
  

Technical Specifications

• Part Number: HNB31000
  
• Manufacturer: Westinghouse
  
• Product Type: Thermal magnetic molded case circuit breaker
  
• Frame Type: HNB
  
• Amperage Rating: 1000 A
  
• Number of Poles: Three-pole
  
• Trip Unit: Interchangeable trip unit
  
• Protection Type: Thermal magnetic
  
• Temperature Rating: 40°C
  
• A.I.C. Rating:25 kA at 600 VAC
  
• 35 kA at 480 VAC
  
• 65 kA at 240 VAC
  
• Terminal Configuration: Load-side terminals included
  
• Dimensions: 8.25"W x 16.00"L x 5.50"D
  
• Height: 16.0 in.
  
• Width: 8.25 in.
  
• Depth: 5.5 in.
  
• Approximate Ship Weight: 55.00 lbs
  

Material Compliance and Certifications

The available product information identifies the HNB31000 as a thermal-magnetic molded-case circuit breaker. Additional material compliance details and certification information were not provided in the available specifications.

For projects with specific environmental, material, or regulatory requirements, those requirements should be verified separately before installation.

Where It Works Best

The HNB31000 1000A molded case circuit breaker is best suited for existing electrical distribution equipment that requires an HNB frame, a three-pole configuration, thermal-magnetic protection, and interchangeable trip-unit capability.

This breaker is a good fit for maintenance applications where the goal is to replace an existing unit while preserving the original electrical characteristics. Before installation, verify the complete specification match, including the frame type, amperage rating, trip unit configuration, number of poles, voltage rating, interrupt capacity, and terminal setup.