LGB1B100B - 100Amp Circuit Breaker

LGB1B100B - 100Amp Circuit Breaker

When you're replacing a breaker in an existing panelboard, finding the same amperage is only the beginning. The LGB1B100B is a 100A, 1-pole LGB G-frame circuit breaker with a thermal-magnetic trip unit. Its interrupting ratings are 65 kA at 277V and 14 kA at 347V, giving you several specific electrical characteristics to compare with the breaker and equipment already in place.

Key Features and Benefits

• 100A, 1-pole configuration for compatible low-voltage panelboard applications
• LGB G-frame design provides a clear frame reference when identifying a replacement
• Thermal-magnetic trip unit provides the specified overload and short-circuit protection
• 65 kA interrupting rating at 277V
• 14 kA interrupting rating at 347V
• UL Listed LGB frame
• Uses TC1GG20 load-side lugs only
• Accepts 8–1/0 AWG copper or aluminum conductors
• Approximate dimensions of 1"W x 5.4"H x 2.8"D make the physical footprint easy to compare
• Well suited to maintenance applications where preserving the existing breaker configuration is important

Technical Specifications

• Catalog Number: LGB1B100B
  
• Article Number: US2\:LGB1B100B
  
• Product Type: Low-Voltage Panelboard-Mount Circuit Breaker
  
• Frame: LGB / G Frame
  
• Ampere Rating: 100A
  
• Number of Poles: 1
  
• Trip Type: Thermal-Magnetic
  
• Interrupting Rating at 277V: 65 kA
  
• Interrupting Rating at 347V: 14 kA
  
• Terminal Arrangement: Load-Side Lugs Only
  
• Load Lug Type: TC1GG20
  
• Wire Range: 8–1/0 AWG
  
• Conductor Compatibility: Copper / Aluminum (Cu/Al)
  
• Dimensions: 1"W x 5.4"H x 2.8"D
  
• Net Weight: 0.86 lb
  
• Country of Origin: Mexico
  
• UPC: 887621220037
  
• Commodity Code: 8536200020
  
• Export Classification: ECCN EAR99 / AL N
  
• Dangerous Goods: No
  

Material Compliance and Certifications

The supplied manufacturer information identifies the LGB frame as UL Listed. Environmental documentation for the LGB1B100B also references WEEE (2012/19/EU) take-back obligations and includes information related to REACH Article 33.

Where It Works Best

The LGB1B100B 100A circuit breaker is best suited for existing and legacy low-voltage panelboard equipment that requires an LGB G-frame breaker with this electrical and physical configuration. For maintenance work, that specificity is useful. You're not trying to find just any 100A single-pole breaker. You're trying to match what the panelboard was designed to use.