LB3250 - 250Amp Circuit Breaker

LB3250 - 250Amp Circuit Breaker

The LB3250 is a 250-amp, 3-pole Type LB thermal-magnetic circuit breaker with an interchangeable trip unit and load-side terminals included. It's rated at 40°C and carries interrupting ratings of 22kA at 600VAC, 30kA at 480VAC, and 42kA at 240VAC. Those numbers are especially useful when you're trying to match a breaker already installed in existing equipment.

Key Features and Benefits

• 250A, 3-pole configuration for applications calling for these specific ratings
• Type LB thermal-magnetic circuit breaker
• Interchangeable trip unit for installations designed around this configuration
• 40°C rated
• Load-side terminals included
• Published dimensions make it easier to check available space and physical compatibility
• Suitable for form, fit, and functional replacement when the complete set of specifications matches the equipment
  

Technical Specifications

• Part Number: LB3250
  
• Type: LB
  
• Amperage: 250A
  
• Poles: 3
  
• Circuit Breaker Type: Thermal-magnetic
  
• Trip Unit: Interchangeable
  
• AIC Rating at 600VAC: 22kA
  
• AIC Rating at 480VAC: 30kA
  
• AIC Rating at 240VAC: 42kA
  
• 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

The supplied specifications for the LB3250 did not include specific UL, CSA, IEC, RoHS, REACH, or other certification and material-compliance information. Do not assume those certifications.

Where It Works Best

The LB3250 makes the most sense where existing equipment calls for a 250A, 3-pole Type LB thermal-magnetic breaker with an interchangeable trip unit. This can be especially important with older or legacy electrical equipment, where the correct configuration and physical fit may be essential for the replacement.

Also pay attention to the system voltage. The breaker is rated 22kA at 600VAC, 30kA at 480VAC, and 42kA at 240VAC, so the interrupting rating must meet the installation requirements.