HEB1B090B - 90Amp Circuit Breaker

HEB1B090B - 90Amp Circuit Breaker

The Siemens HEB1B090B is a 90 Amp, single-pole molded case circuit breaker designed for use with compatible HEB (EG) frame low-voltage panelboards. When you're replacing an existing breaker, matching the correct frame, amperage, voltage rating, and terminal configuration is essential to keeping the original electrical system layout intact. This model uses a thermal-magnetic trip unit to help protect your circuits from overloads and short circuits while maintaining compatibility with the equipment it was built for.

Key Features and Benefits

• Siemens HEB (EG Frame) molded case circuit breaker
• 90 Amp current rating
• Single-pole configuration
• Thermal-magnetic trip protection
• Rated for 277 VAC applications
• Interrupting ratings:
  • 65kAIC @ 277 VAC
  • 25kAIC @ 347 VAC
• Load-side lugs included (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 continued service in existing electrical systems

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HEB1B090B
  
• Product Type: Molded Case Circuit Breaker
  
• Frame: HEB (EG Frame)
  
• Poles: 1
  
• Current Rating: 90 Amps
  
• Voltage Rating: 277 VAC
  
• Trip Unit: Thermal-Magnetic
  
• Interrupting Rating: 65kAIC @ 277 VAC; 25kAIC @ 347 VAC
  
• Terminal Configuration: Load-side lugs (TA1EG10)
  
• Wire Range: 8 AWG to 1/0 AWG Copper/Aluminum
  
• Dimensions: 1" 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 HEB1B090B is commonly used in commercial, industrial, and institutional electrical distribution systems that utilize compatible HEB (EG) frame panelboards. It is a practical replacement option for maintenance and repair applications where the existing breaker specifications need to be matched closely.