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Square D LLL36400U31X - Molded Case Circuit Breaker 400A 600V 3-Pole

Square D
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Square D LLL36400U31X is a PowerPact L Frame molded case circuit breaker designed for overload and short circuit protection in industrial and commercial power distribution systems. It is rated for 400A at 600V AC maximum with a 3-pole configuration and a solid state electronic trip unit providing long-time and instantaneous trip functions. The breaker measures 13.4 in (340 mm) in height, 5.5 in (140 mm) in width, and 4.3 in (110 mm) in depth, weighs 15 lb, and features a feed-thru connection with lug terminals. It complies with UL 489, CSA, NEMA, NOM-003-SCFI-2000, and IEC 60947-2 standards, with certifications from UL, CSA, and NOM. Typical applications include industrial and commercial power distribution systems requiring reliable circuit protection.

Key Features & Specifications
  • Type: LLL
  • Current Rating: 400A
  • Voltage Rating: 600 VAC max
  • Poles: 3
  • Phase: 3
  • Frame Type: PowerPact L
  • Trip Unit: Electronic MicroLogic 3.3
  • Functions: Long Time and Instantaneous Trip
  • Protection: Solid State
  • Interrupt Rating: 100kA@480V
  • Connection Type: Feed-Thru with lug terminals
  • Wire Size: 2 x AWG 2/0...500 kcmil aluminium/copper
  • Dimensions: 13.4 in (340 mm) x 5.5 in (140 mm) x 4.3 in (110 mm) (Height x Width x Depth)
  • Weight: 15 lb
  • Temp Rating: -13–158 °F (-25–70 °C)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Certification: UL, CSA, NOM
  • Country of Origin: United States


Product Identification
  • UPC: 785901710806
  • GTIN: 785901710806