HEB2B040B - 40Amp Circuit Breaker

HEB2B040B - 40Amp Circuit Breaker

The Siemens HEB2B040B is a 40 Amp, 2-pole molded case circuit breaker used in compatible HEB (EG) frame low-voltage panelboards. When you're replacing a breaker in an existing system, the details matter. Matching the original frame style, pole count, amperage, voltage rating, and terminal setup helps ensure the replacement fits the application properly. This model features a thermal-magnetic trip unit for overload and short-circuit protection in compatible Siemens equipment.

Key Features and Benefits

• Siemens HEB (EG Frame) molded case circuit breaker
• 40 Amp current rating
• 2-pole configuration
• Thermal-magnetic trip unit
• Rated for 480 VAC applications
• 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 long-term service in existing equipment

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HEB2B040B
  
• Product Type: Molded Case Circuit Breaker
  
• Frame: HEB (EG Frame)
  
• Poles: 2
  
• 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: 2" W × 5.5" H × 3" D
  
• Weight: 1.257 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
• Not classified as dangerous goods
  

Where It Works Best

The Siemens HEB2B040B is commonly found in commercial buildings, industrial facilities, and institutional electrical distribution systems that use HEB (EG) frame panelboards. It is a good fit for maintenance and replacement work where the existing breaker specifications need to be matched. Keeping the same frame type, pole configuration, ratings, and lug arrangement allows the original panelboard design to remain unchanged.