MES3800LSI - 800 Amp Trip Unit

MES3800LSI - 800 Amp Trip Unit

The MES3800LSI is an 800-amp, three-pole electronic trip unit made for your compatible Series C, Frame J-K molded case circuit breaker equipment. When you're matching a trip unit in existing or legacy electrical gear, the catalog number is only the beginning—the frame, amperage, trip type, protection requirements, and physical size must all line up. For replacement work, that distinction helps keep the selection process focused on form, fit, function, and compatibility with the complete electrical assembly. Solid construction lasts when the trip unit is selected, assembled, installed, and maintained correctly.

Key Features and Benefits

• 800 Amp Rating: The MES3800LSI carries an 800A rating, giving technicians a clear specification to match against the existing application.
• LSI Trip Type: LSI is the specified trip type for this particular catalog number and should be matched carefully during replacement selection.
• Electronic Design: Manufacturer specifications identify the MES3800LSI as an electronic trip unit.
• Frame J-K: The supplied Frame J-K designation is an important compatibility point when checking the existing breaker assembly.
• Three-Pole Configuration: Built around the three-pole configuration stated for this model.
• Ground-Fault Protection: Ground-fault protection is specifically listed in the supplied product specifications.
• Series C Compatibility: Identified as a Series C accessory for compatible equipment meeting the required specifications.
• UL Listed: Certification information supplied for MES3800LSI identifies the product as UL Listed.

Technical Specifications

• Catalog Number: MES3800LSI
  
• Global Catalog Number: MES3800LSI
  
• Product Name: Molded Case Circuit Breaker Accessory Trip Unit
  
• Product Type: Molded Case Circuit Breaker Accessory
  
• Type: Electronic
  
• Series: Series C
  
• Frame Size: Frame J-K
  
• Amperage Rating: 800A
  
• Number of Poles: Three-pole
  
• Trip Type: LSI
  
• Protection: Ground fault
  
• Product Length/Depth: 9 in.
  
• Product Height: 6 in.
  
• Product Width: 5.5 in.
  
• Product Weight: 4.5 lb.
  
• UPC: 782114371367
  

Material Compliance and Certifications

• Certification: UL Listed
• Material Compliance: The supplied specifications did not include specific RoHS, REACH, or other material-compliance information, so do not assume it.

Where It Works Best

The MES3800LSI 800A electronic trip unit is a form, fit, and functional replacement candidate for existing or legacy electrical equipment requiring its specific combination of Series C, Frame J-K, three-pole, 800A, LSI trip type, and ground-fault protection characteristics. Those details matter because a similar-looking trip unit, or one with the same amperage, does not guarantee compatibility.