MES3800LS - 800 Amp Trip Unit

MES3800LS - 800 Amp Trip Unit

When you're replacing a trip unit, the catalog number matters—but so do the amperage, frame size, pole count, and trip configuration. The MES3800LS is an 800-amp, three-pole electronic molded case circuit breaker accessory trip unit for compatible Series C, Frame J-K equipment. For existing or legacy equipment that requires this exact configuration, the MES3800LS can be considered a form, fit, and functional replacement candidate once all application requirements are confirmed. Its solid construction is built to last when selected, assembled, installed, and maintained correctly.

Key Features and Benefits

• 800 Amp Rating: Provides the specified 800A rating for compatible Frame J-K applications.
• Three-Pole Configuration: Matches electrical equipment requiring a three-pole trip unit.
• Electronic Type: The MES3800LS is an electronic trip unit.
• LS Trip Type: Helps narrow the replacement match to equipment requiring this exact trip configuration.
• Ground-Fault Protection: The manufacturer specifies ground-fault protection for this catalog number.
• Series C, Frame J-K: Series and frame information gives technicians and buyers important compatibility details when identifying the correct replacement component.
• Trip Unit, Not a Complete Breaker: The MES3800LS is a molded case circuit breaker accessory trip unit. Do not confuse it with the complete circuit breaker assembly.

Technical Specifications

• Catalog Number: MES3800LS
  
• 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: LS
  
• Protection: Ground fault
  
• Product Length/Depth: 9 in.
  
• Product Height: 6 in.
  
• Product Width: 5.5 in.
  
• Product Weight: 4.5 lb.
  
• UPC: 782114356784
  
• Global Catalog Number: MES3800LS
  

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 MES3800LS electronic trip unit is best considered for existing or legacy electrical equipment that specifically requires an 800A, three-pole Series C trip unit for a Frame J-K application with an LS trip type and ground-fault protection. Because this catalog number identifies an accessory trip unit rather than a complete circuit breaker, check compatibility at the component and breaker-assembly level.