LGB3B100B - 100Amp Circuit Breaker

LGB3B100B - 100Amp Circuit Breaker

Replacing a breaker in an existing panelboard is a detail-driven job. The LGB3B100B is a 100A, 3-pole LGB G-frame circuit breaker made for compatible low-voltage panelboard applications. It uses a thermal-magnetic trip unit and has interrupting ratings of 65 kA at 480Y/277V and 14 kA at 600Y/347V. If LGB3B100B is the catalog number you're trying to match, confirm more than the 100-amp rating. Pole count, frame type, interrupting capacity, lug arrangement, conductor size, and breaker dimensions must all match the equipment. That complete-specification approach is particularly useful when maintaining existing or legacy electrical systems where the goal is a correct form, fit, and functional replacement.

Key Features and Benefits

• 100A, 3-pole configuration for compatible low-voltage panelboard applications
• LGB G-frame construction provides an important reference when matching a breaker to existing equipment
• Thermal-magnetic trip unit provides the specified overload and short-circuit protection
• UL Listed LGB frame
• Equipped with TC1GG20 load-side lugs only
• Accepts 8–1/0 AWG copper or aluminum (Cu/Al) conductors
• Suitable for maintenance and functional replacement when the equipment requires the specific LGB3B100B configuration

Technical Specifications

• Catalog Number: LGB3B100B
  
• Article Number: US2\:LGB3B100B
  
• Product Type: Low-Voltage Panelboard-Mount Circuit Breaker
  
• Frame: LGB / G Frame
  
• Ampere Rating: 100A
  
• Number of Poles: 3
  
• 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: 3"W x 5.4"H x 2.8"D
  
• Net Weight: 2.756 lb
  
• Country of Origin: Mexico
  
• UPC: 887621220334
  
• Commodity Code: 8536200020
  
• Export Classification: ECCN EAR99 / AL N
  
• Dangerous Goods: No
  

Material Compliance and Certifications

The manufacturer-supplied specifications identify the LGB frame as UL Listed. Environmental information associated with the LGB3B100B also references WEEE (2012/19/EU) take-back obligations and provides information related to REACH Article 33.

Where It Works Best

The LGB3B100B 100A 3-pole circuit breaker suits existing and legacy low-voltage panelboards that require this specific LGB G-frame breaker configuration. It makes the most sense in applications where maintaining the breaker's original electrical and physical requirements is important.

For a practical compatibility check, begin with 100 amps and three poles. Confirm that the panelboard requires an LGB G-frame breaker with a thermal-magnetic trip unit. The application must also correspond with the LGB3B100B's 65 kA interrupting rating at 480Y/277V and 14 kA interrupting rating at 600Y/347V.