HMX3B800 - 800Amp Circuit Breaker

HMX3B800 - 800Amp Circuit Breaker

The Siemens HMX3B800 is an 800-amp, three-pole thermal-magnetic molded-case circuit breaker designed for your applications requiring a Type HMG frame and reliable circuit protection in compatible electrical distribution systems. This breaker features an adjustable trip unit with an amp dial setting range of 3250–6500, operates at 50/60 Hz, and carries interrupt ratings of 65 kA at 480 VAC and 100 kA at 240 VAC.

Key Features and Benefits

• 800 amp rating: Designed for applications requiring an 800A molded case circuit breaker.
• Three-pole configuration: Suitable for electrical systems requiring three poles.
• Thermal-magnetic protection: Combines thermal and magnetic trip functions in a single breaker design.
• Adjustable trip unit: Features a trip unit amp dial setting range of 3250–6500 amps.
• HMG frame type: Built around the Siemens HMG frame configuration.
• 50/60 Hz operation: Suitable for systems operating within the listed frequency range.
• Load-side lug terminals included: Provides the specified connection configuration.
  

Technical Specifications

• Part Number: HMX3B800
  
• Manufacturer: Siemens
  
• Product Type: Thermal magnetic circuit breaker
  
• Circuit Breaker Type: HMX3
  
• Frame Type: HMG / Frame MG
  
• Amperage Rating: 800 A
  
• Number of Poles: Three-pole
  
• Trip Unit Type: Thermal magnetic with adjustable amp dial setting
  
• Trip Unit Amp Dial Setting Range: 3250–6500 A
  
• A.I.C. Rating at 480 VAC: 65 kA
  
• A.I.C. Rating at 240 VAC: 100 kA
  
• Frequency Rating: 50/60 Hz
  
• Terminals: Load-side lug terminals
  
• HACR Type: Yes
  
• UPC: 00040892874679
  
• Approximate Ship Weight: 42.00 lbs
  
• Height: 16.0 in.
  
• Width: 7.5 in.
  
• Depth: 4.75 in.
  
• Dimensions: 16.00"L x 7.50"W x 4.75"D
  

Material Compliance and Certifications

The provided product specifications identify the HMX3B800 as a Siemens thermal magnetic circuit breaker with HACR Type designation. The supplied information does not include additional material compliance details or certification listings.

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

Where It Works Best

The Siemens HMX3B800 800A circuit breaker is best suited for compatible electrical distribution equipment requiring a three-pole, 800A thermal-magnetic breaker with an HMG frame configuration. It is a practical fit for maintenance and replacement projects where matching the existing breaker design and electrical characteristics is important.