LGB2B100B - 100Amp Circuit Breaker

LGB2B100B - 100Amp Circuit Breaker

For an existing panelboard, finding the right 100A circuit breaker means looking beyond amperage alone. The LGB2B100B is a 100A, 2-pole LGB G-frame circuit breaker with a thermal-magnetic trip unit, intended for compatible low-voltage panelboard applications. Its interrupting ratings are 65 kA at 480Y/277V and 14 kA at 600Y/347V. Those are important identification points. So are the two-pole configuration, frame, terminals, conductor range, and physical dimensions. Taken together, these details give you a practical checklist for determining whether the breaker matches the equipment you're working on.

Key Features and Benefits

• 100A, 2-pole configuration for compatible low-voltage panelboard applications
• LGB G-frame design provides a useful frame reference when identifying a breaker for existing equipment
• Thermal-magnetic trip unit provides the specified overload and short-circuit protection
• UL Listed LGB frame
• Uses TC1GG20 load-side lugs only
• Accepts 8–1/0 AWG copper or aluminum conductors
• Suited to maintenance and functional replacement where an existing panelboard requires this specific breaker configuration

Technical Specifications

• Catalog Number: LGB2B100B
  
• Article Number: US2\:LGB2B100B
  
• Product Type: Low-Voltage Panelboard-Mount Circuit Breaker
  
• Frame: LGB / G Frame
  
• Ampere Rating: 100A
  
• Number of Poles: 2
  
• Trip Type: Thermal-Magnetic
  
• Interrupting Rating at 480Y/277V: 65 kA
  
• Interrupting Rating at 600Y/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: 2"W x 5.4"H x 2.8"D
  
• Net Weight: 1.852 lb
  
• Country of Origin: Mexico
  
• UPC: 887621220181
  
• Commodity Code: 8536200020
  
• Export Classification: ECCN EAR99 / AL N
  
• Dangerous Goods: No
  

Material Compliance and Certifications

Manufacturer information for the LGB2B100B identifies the LGB frame as UL Listed. The supplied environmental information also references WEEE (2012/19/EU) take-back obligations and provides information associated with REACH Article 33.

Where It Works Best

The LGB2B100B 100A 2-pole circuit breaker is best suited to existing and legacy low-voltage panelboards designed for this particular LGB G-frame breaker arrangement. That's especially important with replacement work. A 100A rating may narrow the search, but it doesn't establish compatibility on its own.

Look at the complete breaker configuration. The application should call for 100 amps, two poles, an LGB G-frame, and a thermal-magnetic trip unit. The electrical system requirements should also correspond with the LGB2B100B interrupting ratings of 65 kA at 480Y/277V and 14 kA at 600Y/347V.