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Square D LJA36250CU31X - Molded Case Breaker 250A 600V 3P (65kA AIC)

Square D
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Square D LJA36250CU31X is a molded case circuit breaker designed for providing reliable overcurrent protection in demanding three-phase industrial power distribution systems. It features a solid-state LI (Long-time and Instantaneous) trip unit for precise protection, rated for 250A at 600V with an interrupting capacity of 65kA at 480V. The breaker is constructed with an L-frame, measures 340 mm H x 140 mm W x 110 mm D, weighs 15 lb, and utilizes a 100% rated, plug-in I-Line connection with lug terminals compatible with copper conductors from AWG 2 to 600 kcmil and aluminum from AWG 2 to 500 kcmil. It complies with UL, CSA, NEMA, NOM-003-SCFI-2000, and IEC 60947-2 standards and is suitable for operation in ambient temperatures from -2°C to 70°C. Typical applications include main and feeder circuit protection in industrial panels, switchboards, and motor control centers.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Solid State LI Trip Unit, I-Line Plug-In
  • Voltage Rating: 600V AC
  • Current Rating: 250A
  • Dimensions: 13.4 in H x 5.5 in W x 4.3 in D (340 mm x 140 mm x 110 mm)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial Power Distribution, Main/Feeder Protection
  • Switch Type: Circuit Breaker
  • Configuration: Fixed
  • Phase: 3
  • Poles: 3
  • AIC Rating: 65kA @ 480V
  • Connection: I-Line Style Plug-In, Lug Terminal
  • Protection: Overcurrent, Solid State
  • Functions: Long-Time and Instantaneous (LI)
  • Frame Size: L Frame
  • Trip Type: Solid State
  • Breaker Type: 100% Rated
  • Temp Rating: -2°C to 70°C (28°F to 158°F)
  • Wire Size: AWG 2 to 600 kcmil Copper; AWG 2 to 500 kcmil Aluminum
  • Certification: UL, CSA, NOM
  • Mounting: Plug-In
  • Enclosure: Molded Case
  • Terminal Connection: Lug
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-Phase
  • Compatible Frames: I-Line Panelboards
  • Installation Type: Plug-In
  • Weight: 15 lb
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901004011
  • GTIN: 00785901004011