LL3B500 - 500Amp Circuit Breaker

LL3B500 - 500Amp Circuit Breaker

A 500A breaker may sound simple to match. With an LL3B500, a few more details matter. This is a 3-pole molded-case circuit breaker in the LL3 type, identified as Type ET with a 600-amp LL frame. That's why the full catalog number and electrical ratings are so useful when you're trying to match a breaker in equipment that's already in service.

Key Features and Benefits

• 500A current rating
• 3-pole molded case circuit breaker
• LL3 type configuration
• Identified as Type ET
• 600 Ampere LL frame
• Specified at 40°C
• Approximately 9"W x 11"H x 4"D
• Clearly stated interrupting ratings make it easier to check the breaker against the system voltage
• Useful for form, fit, and functional replacement where existing equipment calls specifically for the LL3B500 configuration

Technical Specifications

• Part Number: LL3B500
  
• Product Type: Molded Case Circuit Breaker
  
• Type: LL3
  
• Amperage: 500A
  
• Poles: 3
  
• Frame: 600 Ampere LL Frame
  
• Additional Identification: Type ET
  
• Temperature Rating: 40°C
  
• A.I.C. at 240VAC: 42 kA
  
• A.I.C. at 480VAC: 30 kA
  
• A.I.C. at 600VAC: 22 kA
  
• Width: 9 in.
  
• Height: 11 in.
  
• Depth: 4 in.
  
• Overall Dimensions: 9.00"W x 11.00"H x 4.00"D
  

Material Compliance and Certifications

The available information for the LL3B500 doesn't specify exact UL, CSA, IEC, RoHS, REACH, or other certification and material-compliance details.

Where It Works Best

The LL3B500 is the kind of breaker you look at when you're maintaining existing or legacy electrical equipment that calls for this particular 500A, three-pole LL-frame configuration.

That's what matters with an LL3B500 replacement circuit breaker—not finding something vaguely similar. Finding the configuration that satisfies the required form, fit, and electrical function of the existing equipment.