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Square D LLA36400CU44X - Molded Case Circuit Breaker 400A 600V

Square D
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Square D LLA36400CU44X is a molded case circuit breaker designed for providing comprehensive LSIG protection in three-phase industrial power distribution systems. It features a 400A current rating and a 600V voltage rating, housed within a compact L-frame measuring 340 mm x 140 mm x 110 mm (HxWxD) and weighing 17 lb. The breaker is constructed with solid-state protection technology and an I-Line style plug-in connection for simplified installation, complying with UL, CSA, NEMA, NOM, and IEC 60947-2 standards. Its 100kA interrupting capacity at 480V and operational temperature range of -2 to 70 °C make it suitable for demanding applications in manufacturing, data centers, and commercial facilities.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, LLA Type, Solid State Protection
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: 13.4 in (340 mm) x 5.5 in (140 mm) x 4.3 in (110 mm) (HxWxD)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial power distribution, manufacturing, data centers
  • Switch Type: Circuit Breaker
  • Configuration: I-Line Style Plug-In
  • Phase: 3
  • AIC Rating: 100kA @ 480V
  • Poles: 3
  • Protection: LSIG (Long-Time, Short-Time, Instantaneous, Ground Fault)
  • Functions: LSIG Protection
  • Frame Size: L Frame
  • Temp Rating: 28-158 °F (-2-70 °C)
  • Wire Size: 2 x AWG 2/0...500 kcmil aluminium/copper
  • Certification: UL, CSA, NOM
  • Family: Powerpact
  • Country of Origin: United States
  • Weight: 17 lb


Product Identification
  • GTIN: 03606486283998