LGB3B050B - 50Amp Circuit Breaker

LGB3B050B 50A 3-Pole LGB G-Frame Circuit Breaker

Finding the right 50A circuit breaker for your existing panelboard means checking more than the handle rating. The LGB3B050B is a 50A, 3-pole LGB G-frame circuit breaker for compatible low-voltage panelboard applications. It has a thermal-magnetic trip unit and interrupting ratings of 65 kA at 480Y/277V and 14 kA at 600Y/347V. For maintenance work, consider those electrical specifications alongside the breaker's frame, pole configuration, terminals, conductor range, and dimensions. It's the combination that matters. Matching the complete LGB3B050B configuration to the existing equipment provides a practical basis for determining whether the breaker meets the required form, fit, and function.

Key Features and Benefits

• 50A, 3-pole configuration for compatible low-voltage panelboard applications
• LGB G-frame design provides a clear frame reference when identifying the required breaker
• 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 (Cu/Al) conductors
• Suitable for maintenance and functional replacement applications where the existing equipment requires this specific LGB3B050B configuration

Technical Specifications

• Catalog Number: LGB3B050B
  
• Article Number: US2\:LGB3B050B
  
• Product Type: Low-Voltage Panelboard-Mount Circuit Breaker
  
• Frame: LGB / G Frame
  
• Ampere Rating: 50A
  
• 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: 887621220280
  
• Commodity Code: 8536200020
  
• Export Classification: ECCN EAR99 / AL N
  
• Dangerous Goods: No
  

Material Compliance and Certifications

The supplied product specifications identify the LGB frame as UL Listed. Environmental information for the LGB3B050B also references WEEE (2012/19/EU) take-back obligations and provides information associated with REACH Article 33.

Where It Works Best

The LGB3B050B 50A 3-pole circuit breaker suits maintenance of existing and legacy low-voltage panelboards that require this particular LGB G-frame breaker configuration. When you're trying to keep existing equipment in service, the goal is a correct specification match—not simply finding another breaker with a 50A rating.