LB3150 - 150Amp Circuit Breaker

LB3150 - 150Amp Circuit Breaker

The LB3150 is a 150-amp, 3-pole Type LB thermal-magnetic circuit breaker with an interchangeable trip unit. It carries interrupting ratings of 22kA at 600VAC, 30kA at 480VAC, and 42kA at 240VAC and is rated for 40°C operation. Load-side terminals are included.

When you're sourcing an LB3150 for existing equipment, check the full specification rather than relying on amperage alone. You'll also want to match the LB type, three-pole configuration, voltage and AIC requirements, trip-unit arrangement, and terminals.

Key Features and Benefits

• 150A, 3-pole configuration
• Type LB circuit breaker
• Thermal-magnetic design
• Interchangeable trip unit
• Rated for 40°C
• Load-side terminals included
• Published dimensions help with replacement fit checks
• Well suited to form, fit, and functional replacement when the equipment requirements match
  

Technical Specifications

• Part Number: LB3150
  
• Type: LB
  
• Rated Current: 150A
  
• Poles: 3
  
• Trip Design: Thermal magnetic
  
• Trip Unit: Interchangeable
  
• AIC Rating: 22kA at 600VAC
  
• AIC Rating: 30kA at 480VAC
  
• AIC Rating: 42kA at 240VAC
  
• Temperature Rating: 40°C
  
• Terminals: Load-side terminals included
  
• Height: 10.13 in.
  
• Width: 5.50 in.
  
• Depth: 3.94 in.
  
• Overall Dimensions: 5.50" W × 10.13" L × 3.94"D
  
• Approx. Ship Weight: 16.00 lbs.
  

Material Compliance and Certifications

No specific UL, CSA, IEC, RoHS, REACH, or other certification or material-compliance information was provided for the LB3150. Don't assume those details based on the LB type or specifications for similar breakers.

Where It Works Best

The LB3150 makes the most sense in equipment that specifically requires a 150A, 3-pole Type LB thermal-magnetic breaker with an interchangeable trip unit. That makes it particularly useful for maintaining compatible existing or legacy electrical equipment where keeping the correct form, fit, and function is the priority.

Check the system requirements against the breaker's interrupting ratings: 22kA at 600VAC, 30kA at 480VAC, and 42kA at 240VAC. The 40°C rating and load-side terminal configuration should also match the application.