HEB3B040B - 40Amp Circuit Breaker

HEB3B040B - 40Amp Circuit Breaker

The Siemens HEB3B040B is a 40 Amp, 3-pole molded case circuit breaker used in compatible HEB (EG) frame low-voltage panelboard applications. When you're replacing a breaker in an existing electrical system, the best match comes from comparing the details that affect installation: frame type, pole configuration, amperage rating, voltage rating, and terminal arrangement. This model features a thermal-magnetic trip unit to help protect your circuits from overloads and short circuits while matching the requirements of compatible Siemens HEB frame equipment.

Key Features and Benefits

• Siemens HEB (EG Frame) molded case circuit breaker
• 40 Amp current rating
• 3-pole configuration for three-phase applications
• Thermal-magnetic trip protection
• 480 VAC application rating
• Interrupting ratings:
• 65kAIC @ 480 VAC
• 25kAIC @ 600Y/347 VAC
• Load-side lugs (TA1EG10)
• Accepts 8 AWG to 1/0 AWG copper or aluminum conductors
• Matches the form, fit, and function of compatible HEB frame installations
• UL Listed
• Built to last for use in existing electrical equipment

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HEB3B040B
  
• Product Type: Molded Case Circuit Breaker
  
• Frame: HEB (EG Frame)
  
• Poles: 3
  
• Current Rating: 40 Amps
  
• Voltage Rating: 480 VAC
  
• Trip Unit: Thermal-Magnetic
  
• Interrupting Rating:
  65kAIC @ 480 VAC
  25kAIC @ 600Y/347 VAC
• Terminal Configuration: Load-side lugs (TA1EG10)
  
• Wire Range: 8 AWG to 1/0 AWG Copper/Aluminum
  
• Dimensions: 3" W × 5.5" H × 3" D
  
• Weight: 2.601 lb
  
• Country of Origin: Dominican Republic
  

Material Compliance and Certifications

• UL Listed
• Compatible with copper and aluminum conductors
• ECCN: EAR99
• Commodity Code: 8536200040
• WEEE Category 5
  

Where It Works Best

The Siemens HEB3B040B is commonly used in commercial buildings, industrial facilities, and institutional electrical systems that utilize compatible HEB (EG) frame panelboards. It is suited for maintenance and replacement projects where the existing breaker needs to match the original equipment specifications.