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Square D LLL36400CU33X - Molded Case Circuit Breaker 400A 600V

Square D
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Square D LLL36400CU33X is a molded case circuit breaker designed for providing adjustable solid-state 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 (H x W x D) and weighing 15 lb. The unit complies with UL, CSA, NEMA, NOM, and IEC 60947-2 standards and is engineered for reliable operation in ambient temperatures from -2 to 70 °C. Its feed-thru connection and support for conductors from 2/0 AWG to 500 kcmil make it suitable for main feeder and branch circuit protection in commercial and industrial panels.

Key Features & Specifications
  • Type: LLL Series, Molded Case, Solid-State Trip Unit
  • 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) (H x W x D)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial Power Distribution, Main Feeder & Branch Circuit Protection
  • Switch Type: Circuit Breaker
  • Configuration: Fixed
  • Poles: 3
  • Phase: 3
  • AIC Rating: 100kA @ 480V
  • Connection: Feed-Thru
  • Protection: Solid State
  • Functions: Long Time, Short Time, Instantaneous Trip
  • Frame Size: L Frame
  • Trip Type: Electronic
  • Wire Size: 2 x AWG 2/0...500 kcmil (Aluminium/Copper)
  • Certification: UL, CSA, NOM
  • Temp Rating: 28-158 °F (-2-70 °C)
  • Weight: 15 lb
  • Family: Powerpact
  • Country of Origin: United States


Product Identification
  • UPC: 060648628405
  • GTIN: 03606486284056