LGB3B025B - 25Amp Circuit Breaker

LGB3B025B - 25Amp Circuit Breaker

When you're replacing a breaker in an existing panelboard, the catalog number is a great place to start. The LGB3B025B is a 25A, 3-pole LGB G-frame circuit breaker 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. Those specifications help identify the breaker, but you shouldn't consider them in isolation. The panelboard also needs to accommodate the LGB G-frame, three-pole arrangement, terminal setup, conductor range, and physical dimensions of this exact model. For maintenance work on existing electrical equipment, checking those details together gives you a much better picture of compatibility than simply matching the 25A rating.

Key Features and Benefits

• 25A, 3-pole configuration for compatible low-voltage panelboard applications
• LGB G-frame design gives maintenance personnel 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 TC1Q1 load-side lugs only
• Accepts 14–10 AWG copper or aluminum (Cu/Al) conductors
• Well suited to maintenance and functional replacement applications where the existing equipment requires the LGB3B025B configuration

Technical Specifications

• Catalog Number: LGB3B025B
  
• Article Number: US2\:LGB3B025B
  
• Product Type: Low-Voltage Panelboard-Mount Circuit Breaker
  
• Frame: LGB / G Frame
  
• Ampere Rating: 25A
  
• 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: TC1Q1
  
• Wire Range: 14–10 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: 887621220235
  
• Commodity Code: 8536200020
  
• Export Classification: ECCN EAR99 / AL N
  
• Dangerous Goods: No
  

Material Compliance and Certifications

The supplied product information identifies the LGB frame as UL Listed. Environmental documentation associated with the LGB3B025B also references WEEE (2012/19/EU) take-back obligations and includes information concerning REACH Article 33.

Where It Works Best

The LGB3B025B 25A 3-pole circuit breaker makes sense for existing and legacy low-voltage panelboards designed around this particular LGB G-frame breaker configuration. It's a specification-driven replacement. In other words, seeing "25A" on the breaker is only the first step in the compatibility check.