HEB1B040B - 40Amp Circuit Breaker

HEB1B040B - 40Amp Circuit Breaker

The Siemens HEB1B040B is a 40 Amp, single-pole molded case circuit breaker built for use in compatible HEB (EG) frame low-voltage panelboards. It uses a thermal-magnetic trip unit to protect your electrical circuits from overloads and short circuits, making it a dependable choice for keeping existing distribution equipment operating as intended.

Key Features and Benefits

• Siemens HEB (EG) frame molded case circuit breaker
• 40 Amp current rating
• Single-pole design
• Thermal-magnetic trip unit for overload and short-circuit protection
• Rated for 277 VAC applications
• Factory-equipped with load-side lugs (TA1EG10)
• Accepts 8 AWG to 1/0 AWG copper or aluminum conductors
• Designed for form, fit, and functional compatibility with existing HEB frame panelboards
• UL Listed
• Built to last for continued service in compatible electrical systems

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HEB1B040B
  
• Product Type: Molded Case Circuit Breaker
  
• Frame Type: HEB (EG Frame)
  
• Number of Poles: 1
  
• Current Rating: 40 Amps
  
• Voltage Rating: 277 VAC
  
• Trip Unit: Thermal-Magnetic
  
• Interrupting Rating: 65kAIC @ 277 VAC; 25kAIC @ 347 VAC
  
• Terminal Type: Load-side lugs (TA1EG10)
  
• Wire Range: 8 AWG to 1/0 AWG Copper/Aluminum
  
• Dimensions: 1 in. W × 5.5 in. H × 3 in. D
  
• Weight: 1.257 lb
  
• Country of Origin: Dominican Republic
  

Material Compliance and Certifications

• UL Listed
• Accepts copper and aluminum conductors
• ECCN: EAR99
• Commodity Code: 8536200040
• WEEE Category 5
• Not classified as dangerous goods
  

Where It Works Best

The Siemens HEB1B040B is used in compatible HEB (EG) frame panelboards found in commercial buildings, industrial facilities, and institutional properties. It is intended for maintaining existing electrical systems where preserving the original form, fit, and function is essential.