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Square D LLA36400U44X - Molded Case Circuit Breaker 400A 600V 3P

Square D
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Square D LLA36400U44X is a Powerpact L-Frame molded case circuit breaker designed for robust overcurrent and ground fault protection in demanding three-phase industrial power systems. It features a solid-state trip unit providing Long Time, Short Time, Instantaneous, and Ground Fault protection functions, rated for 400A at 600V with an interrupting capacity of 100kA at 480V. The unit is constructed for reliable operation in temperatures from -25 to 70 °C and features an I-Line style plug-in connection for conductors from AWG 3/0 to 500 kcmil. It complies with UL, CSA, NEMA, NOM, and IEC 60947-2 standards, ensuring suitability for industrial panelboards, switchboards, and motor control centers requiring high-fault current protection.

Key Features & Specifications
  • Type: Powerpact L-Frame, Molded Case Circuit Breaker with Solid-State Trip Unit
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: 340 mm H x 140 mm W x 110 mm D (13.4 in x 5.5 in x 4.3 in)
  • Weight: 17 lb
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial Panelboards, Switchboards, Motor Control Centers
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • Phase: 3
  • AIC Rating: 100kA @ 480V
  • Connection: I-Line Style Plug-In
  • Poles: 3
  • Protection: Solid State (Long Time, Short Time, Instantaneous, Ground Fault)
  • Functions: Long Time, Short Time, Instantaneous, Ground Fault Trip
  • Frame Size: L Frame
  • Wire Size: AWG 3/0 to 500 kcmil (Aluminium/Copper)
  • Certification: UL, CSA, NOM
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901954682
  • GTIN: 00785901954682