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Square D LJA36600U54X - Molded Case Breaker 600A 600V (65kA AIC)

Square D
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Square D LJA36600U54X is a molded case circuit breaker designed for providing comprehensive protection in three-phase industrial power distribution systems. It features a 600A 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 17 lb. This unit complies with UL, CSA, NEMA, NOM, and IEC 60947-2 standards and utilizes solid-state LSIG protection for long-time, short-time, instantaneous, and ground fault conditions. Its I-Line style plug-in connection and lug terminals facilitate installation in applications such as panelboards and switchboards, supporting wire sizes from 2/0 AWG to 500 kcmil for aluminum or copper conductors.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, L Frame, Solid State Protection
  • Voltage Rating: 600V AC
  • Current Rating: 600A
  • 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, Panelboards, Switchboards
  • Switch Type: Circuit Breaker
  • Configuration: Plug-In
  • Coil Voltage Maximum: Not Specified
  • Temp Rating: 28-158 °F (-2-70 °C)
  • Shipping Dimensions: Not Specified
  • Phase: 3
  • Voltage: 600V
  • Amperage: 600A
  • AIC rating: 65kA @ 480V
  • Connection: I-Line Style Plug-In, Lug Terminal
  • Poles: 3
  • Protection: Solid State
  • Functions: LSIG (Long-Time, Short-Time, Instantaneous, Ground Fault)
  • Frame Size: L Frame
  • Trip Type: LSIG
  • Panel Type: Compatible with I-Line Panelboards
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not Specified
  • Control Voltage Maximum: Not Specified
  • MCM Size: Accepts up to 500 kcmil
  • Metal Type: Not Specified
  • Panel Style: Not Specified
  • Bus Type: I-Line
  • Fuse Class: Not Applicable
  • Insulation Temperature: Rated for -2 to 70 °C
  • Inductance: Not Specified
  • Impedance: Not Specified
  • Barrels: Not Specified
  • Class Rating: Not Specified
  • Diameter: Not Specified
  • Velocity: Not Specified
  • Clip Center: Not Specified
  • Class: Not Specified
  • Mounting: Plug-In
  • Hz: 50/60 Hz (Typical for Standards)
  • Coil Material: Not Specified
  • Horse Power: Not Specified
  • Aux Contacts: Not Specified
  • CPT: Not Specified
  • Full Load Amps: 600A
  • Dist Voltage: 600V
  • Bucket Size: Not Specified
  • Bucket Style: Not Specified
  • Bucket Type: Not Specified
  • Full Load Amp Maximum: 600A
  • Full Load Amp Minimum: Not Specified
  • Enclosure: Molded Case
  • Relay Style: Not Specified
  • Coil Voltage Minimum: Not Specified
  • Wire: Accepts 2 x AWG 2/0 to 500 kcmil Al/Cu
  • Amperage Maximum: 600A
  • Amperage Minimum: Not Specified
  • Nema Rating: Compliant
  • Switch Style: Circuit Breaker
  • Wire Size: 2 x AWG 2/0...500 kcmil aluminium/copper
  • Certification: UL, CSA, NOM
  • Circuit Breaker Mounting Style: Plug-In
  • Terminal Connection: I-Line, Lug
  • Frequency Rating: 50/60 Hz (Implied by Standards)
  • Phase Connection: 3-Phase
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Compatible Frames: I-Line Panelboards
  • Installation Type: Plug-In
  • Item QTY: 1
  • Nema Starter Size: Not Specified
  • Breaker Frame: L Frame
  • Current Rating: 600A
  • Reverse Standoff Voltage: Not Specified
  • Watts: Not Specified
  • Peak Pulse Current: Not Specified
  • Breakdown Voltage (MIN VBR@IT ) (V): Not Specified
  • Breakdown Voltage (VBR@IT) (V): Not Specified
  • Polarity: Not Specified
  • Operating Temperature Maximum Celsius: 70 °C
  • Max Clamp Voltage: Not Specified
  • On-State Current: Not Specified


Product Identification
  • UPC: 606486284438
  • GTIN: 03606486284438