HEB2B125B - 125Amp Circuit Breaker

HEB2B125B - 125Amp Circuit Breaker

The Siemens HEB2B125B is a 125 Amp, 2-pole molded case circuit breaker designed for compatible HEB (EG) frame low-voltage panelboard applications. For replacement and maintenance work, matching the original breaker specifications is essential. The frame type, number of poles, amperage rating, voltage rating, and terminal configuration all help determine whether your breaker is the correct fit for an existing electrical system. This model features a thermal-magnetic trip unit to help provide overload and short-circuit protection while maintaining the required configuration for compatible Siemens HEB frame equipment.

Key Features and Benefits

• Siemens HEB (EG Frame) molded case circuit breaker
• 125 Amp current rating
• 2-pole configuration
• Thermal-magnetic trip unit
• Rated for 480 VAC applications
• Load-side lugs included (TA1EG10)
• Accepts 8 AWG to 1/0 AWG copper or aluminum conductors
• Designed to match compatible HEB frame panelboard installations

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HEB2B125B
  
• Product Type: Molded Case Circuit Breaker
  
• Frame: HEB (EG Frame)
  
• Poles: 2
  
• Current Rating: 125 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 HEB2B125B is commonly used in commercial buildings, industrial facilities, and institutional electrical distribution systems that utilize compatible HEB (EG) frame panelboards. It is best suited for repair and replacement applications where the existing breaker needs to match the original equipment specifications.