HEB2B045B - 45Amp Circuit Breaker

HEB2B045B - 45Amp Circuit Breaker

The Siemens HEB2B045B is a 45 Amp, 2-pole molded case circuit breaker designed for compatible HEB (EG) frame low-voltage panelboards. When you're replacing an existing breaker, matching the original specifications is the priority — including the frame style, pole configuration, amperage, voltage rating, and terminal arrangement. This model features a thermal-magnetic trip unit to help protect your circuits from overloads and short circuits while fitting the requirements of compatible Siemens equipment.

Key Features and Benefits

• Siemens HEB (EG Frame) molded case circuit breaker
• 45 Amp current rating
• 2-pole configuration
• Thermal-magnetic trip unit
• Rated for 480 VAC applications
• Interrupting ratings:
• 65kAIC @ 480 VAC
• 25kAIC @ 600Y/347 VAC
• Load-side lugs included (TA1EG10)
• Accepts 8 AWG to 1/0 AWG copper or aluminum conductors
• Designed to match compatible HEB frame panelboard installations
• UL Listed
• Built to last for continued use in existing electrical equipment

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HEB2B045B
  
• Product Type: Molded Case Circuit Breaker
  
• Frame: HEB (EG Frame)
  
• Poles: 2
  
• Current Rating: 45 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
• RoHS compliance information not available
  

Where It Works Best

The Siemens HEB2B045B is commonly used in commercial buildings, industrial facilities, and institutional electrical distribution systems that use compatible HEB (EG) frame panelboards. It is a good fit for repair and maintenance work where the existing breaker needs to be matched by frame type, pole count, electrical ratings, and connection style. Keeping those specifications consistent helps maintain the original panelboard configuration and allows compatible equipment to remain in service.