LGB2B050B - 50Amp Circuit Breakaer

LGB2B050B - 50Amp Circuit Breakaer

Working on your existing panelboard and need to match a 50A, 2-pole LGB breaker? The LGB2B050B is a G-frame circuit breaker with a thermal-magnetic trip unit, rated 65 kA at 480Y/277V and 14 kA at 600Y/347V. Those ratings quickly narrow down compatibility, but they're not the only details worth checking. With an existing electrical system, the breaker frame, number of poles, trip type, terminals, conductor range, and dimensions must match the application.

Key Features and Benefits

• 50A, 2-pole configuration for compatible low-voltage panelboard applications
• LGB G-frame design gives you an important reference point when matching existing equipment
• Thermal-magnetic trip unit provides the specified overload and short-circuit protection
• UL Listed LGB frame
• Uses TC1GG20 load-side lugs only
• Handles 8–1/0 AWG copper or aluminum conductors
• Practical for maintenance and functional replacement when an existing panelboard requires this specific breaker configuration

Technical Specifications

• Catalog Number: LGB2B050B
  
• Article Number: US2\:LGB2B050B
  
• Product Type: Low-Voltage Panelboard-Mount Circuit Breaker
  
• Frame: LGB / G Frame
  
• Ampere Rating: 50A
  
• 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: 887621220136
  
• Commodity Code: 8536200020
  
• Export Classification: ECCN EAR99 / AL N
  
• Dangerous Goods: No
  

Material Compliance and Certifications

Manufacturer specifications identify the LGB frame as UL Listed. Environmental documentation for the LGB2B050B also references WEEE (2012/19/EU) take-back obligations and includes information associated with REACH Article 33.

Where It Works Best

The LGB2B050B 50A 2-pole circuit breaker is particularly relevant for maintenance of existing and legacy low-voltage panelboards that require this LGB G-frame configuration. In this type of application, the goal isn't to find something that looks similar. It's to match the characteristics the equipment actually requires.

When those details—the amperage, pole count, frame, trip type, voltage and interrupting ratings, lugs, conductor range, and dimensions—match the panelboard requirements, the LGB2B050B can be evaluated as the correct form, fit, and functional replacement for the equipment.