LGB1B070B - 70Amp Circuit Breaker

LGB1B070B - 70Amp Circuit Breaker

The LGB1B070B is a 70A, 1-pole LGB G-frame circuit breaker for compatible low-voltage panelboards. It uses a thermal-magnetic trip unit and carries interrupting ratings of 65 kA at 277V and 14 kA at 347V. When you're replacing a breaker in an existing panel, the 70-amp rating is an obvious place to start. Just don't make it the only thing you check. The frame, trip type, connections, conductor range, and physical size all affect whether the breaker actually belongs there.

Key Features and Benefits

• 70A, single-pole configuration for compatible low-voltage panelboards
• LGB G-frame design provides an important reference when identifying the correct 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 wire
• Well suited to maintenance and functional replacement where the original breaker configuration needs to be retained

Technical Specifications

• Catalog Number: LGB1B070B
  
• Article Number: US2\:LGB1B070B
  
• Product Type: Low-Voltage Panelboard-Mount Circuit Breaker
  
• Frame: LGB / G Frame
  
• Ampere Rating: 70A
  
• Number of Poles: 1
  
• Trip Type: Thermal-Magnetic
  
• Interrupting Rating at 277V: 65 kA
  
• Interrupting Rating at 347V: 14 kA
  
• Terminal Arrangement: Load-Side Lugs Only
  
• Load Lug Type: TC1GG20
  
• Wire Range: 8–1/0 AWG
  
• Conductor Type: Copper / Aluminum (Cu/Al)
  
• Dimensions: 1"W x 5.4"H x 2.8"D
  
• Net Weight: 0.86 lb
  
• Country of Origin: Mexico
  
• UPC: 887621220006
  
• Commodity Code: 8536200020
  
• Export Classification: ECCN EAR99 / AL N
  
• Dangerous Goods: No
  

Material Compliance and Certifications

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

Where It Works Best

The LGB1B070B 70A circuit breaker is best suited to existing and legacy low-voltage panelboard equipment designed for an LGB G-frame breaker with these characteristics. That's where careful identification pays off. You're not looking for something merely close—you want the electrical and physical details to match the equipment you're servicing.

Take a look at the breaker coming out. Is it 70A and single-pole? Does the equipment require an LGB G-frame with a thermal-magnetic trip? Next, check the interrupting requirements. The LGB1B070B is rated 65 kA at 277V and 14 kA at 347V.