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Square D MEF36400LI - Molded Case Circuit Breaker 400A 600V 3-Pole

Square D
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Square D MEF36400LI is a 3-pole molded case circuit breaker designed for overcurrent protection in power distribution systems. This 400 amp, 600 volt breaker utilizes a thermal magnetic trip unit with Long-Time and Instantaneous (LI) functions for dependable circuit interruption. The unit features a bolt-on mounting style, weighs 50 lb, and is constructed on the ME Frame. It is UL Listed and carries an interrupting rating of 65kA at 480V. This breaker is suited for industrial applications requiring robust protection for three-phase electrical systems.

Key Features & Specifications
  • Manufacturer: Square D
  • Item Subcategory: Molded Case
  • Weight: 50 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600 VAC
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC rating: 65kA at 480V
  • Phase: 3
  • Current Rating: 400 Amps
  • Series/Frame: ME Frame
  • Certifications: UL Listed


Part Number: MEF36400LI