HGB3B100B - 100Amp Circuit Breaker

HGB3B100B - 100Amp Circuit Breaker

If you’re replacing a breaker in an existing panelboard, the HGB3B100B gives you a clear set of specs to match against. It’s a 100-amp, 3-pole HGB G-frame circuit breaker with a thermal-magnetic trip unit for overload and short-circuit protection. For electricians and facility teams, the important part is the full match: amperage, poles, frame, interrupting rating, lug type, wire range, and physical size all need to line up with the equipment being serviced.

Key Features and Benefits

• 100A, 3-pole design: Built for compatible three-pole applications that require a 100-amp breaker.
• Thermal-magnetic trip unit: Provides overload and short-circuit protection in a straightforward configuration.
• HGB G-frame construction: Made for compatible low-voltage panelboard applications using this frame.
• TC1GG20 load-side lugs: Provides the specified load-side connection arrangement for this model.
• 8 AWG to 1/0 AWG conductor range: Accepts copper or aluminum wire within the stated size range.
  

Technical Specifications

• Catalog Number / MFN: HGB3B100B
  
• Article Number: US2\:HGB3B100B
  
• Product Type: Low-voltage panelboard circuit breaker
  
• Frame: HGB G-Frame
  
• Rated Current: 100A
  
• Number of Poles: 3
  
• Trip Type: Thermal-magnetic
  
• Interrupting Rating at 600Y/347V: 14 kAIC
  
• Interrupting Rating at 480Y/277V: 35 kAIC
  
• Lug Configuration: Load-side lugs only
  
• Lug Type: TC1GG20
  
• Wire Range: 8 AWG–1/0 AWG
  
• Conductor Compatibility: Copper / Aluminum (Cu/Al)
  
• Dimensions (W x H x D): 3 x 5.4 x 2.8 in.
  
• Net Weight: 2.756 lb.
  
• UPC: 887621219888
  
• Commodity Code: 8536200020
  
• Country of Origin: Mexico
  
• Dangerous Goods Classification: No
  
• Export Classification: ECCN EAR99 / AL N
  

Material Compliance and Certifications

The HGB3B100B is UL Listed, which is one of the key certification details to confirm when evaluating the breaker for a specific panelboard or electrical application.

Where It Works Best

The HGB3B100B is a strong fit for compatible low-voltage panelboards in commercial and industrial electrical systems that call for a 100A, three-pole HGB G-frame breaker with thermal-magnetic protection.

It’s especially useful in replacement and maintenance work where the original breaker’s physical and electrical characteristics need to be matched closely. Don’t rely on the “100A” marking alone. Check the HGB frame, pole count, system voltage, interrupting rating, TC1GG20 lug setup, conductor range, and dimensions against the equipment before installation.