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Square D LGL36400CU33X - Molded Case Circuit Breaker 400A 600V

Square D
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Square D LGL36400CU33X is a 400A, 3-pole molded case circuit breaker from the Powerpact family, designed for solid-state protection with LSI (Long-Time, Short-Time and Instantaneous) trip functions. It operates at 600VAC with a 35kA interrupting capacity at 480V, supporting 3-phase systems and accepting wire sizes from 2 x AWG 2/0 to 500 kcmil aluminum/copper via lug terminals. This 100% rated breaker measures 13.4 in x 5.5 in x 4.3 in (340 mm x 140 mm x 110 mm) and weighs 15 lb, featuring a feed-thru connection and an L Frame size. It complies with UL, CSA, NEMA, NOM-003-SCFI-2000, and IEC 60947-2 standards, with a temperature rating of 28-158°F (-2-70°C). Typical industrial applications include main or feeder protection in switchboards, panelboards, and motor control centers requiring precise solid-state overcurrent protection.

Key Features & Specifications
  • Type: LGL Molded Case Circuit Breaker, Solid State, LSI 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) (Height x Width x Depth)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Main or feeder protection in switchboards, panelboards, motor control centers
  • Switch Type: Molded Case
  • Configuration: 3-Pole
  • Coil Voltage Maximum: Not applicable (solid state)
  • Temp Rating: 28-158°F (-2-70°C)
  • Shipping Dimensions: 13.4 in x 5.5 in x 4.3 in
  • Phase: 3
  • Voltage: 600V
  • Amperage: 400A
  • AIC rating: 35kA@480V
  • Connection: Feed-Thru
  • Poles: 3
  • Protection: Solid State
  • Functions: LSI - Long-Time, Short-Time and Instantaneous
  • Frame Size: L Frame
  • Trip Type: Solid State
  • Panel Type: Not specified
  • Breaker Type: 100% rated
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: 2 x AWG 2/0...500 kcmil
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not applicable
  • Insulation Temperature: Not specified
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not specified
  • Class Rating: Not specified
  • Diameter: Not specified
  • Velocity: Not specified
  • Clip Center: Not specified
  • Clas: Not specified
  • Mounting: Not specified
  • Hz: Not specified
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: Not specified
  • Dist Voltage: Not specified
  • Bucket Size: Not specified
  • Bucket Style: Not specified
  • Bucket Type: Not specified
  • Full Load Amp Maximum: Not specified
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: 2 x AWG 2/0...500 kcmil
  • Amperage Maximum: 400A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Not specified
  • Wire Size: 2 x AWG 2/0...500 kcmil
  • Certification: UL, CSA, NOM
  • Circuit Breaker Mounting Style: Not specified
  • Terminal Connection: Lug
  • Frequency Rating: Not specified
  • Phase Connection: 3-Phase
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Compatible Frames: L Frame
  • Installation Type: Not specified
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: L Frame
  • Current Rating: 400A
  • Reverse Standoff Voltage: Not applicable
  • Watts: Not specified
  • Peak Pulse Current: Not applicable
  • Breakdown Voltage (MIN VBR@IT ) (V): Not applicable
  • Breakdown Voltage (VBR@IT) (V): Not applicable
  • Polarity: Not applicable
  • Operating Temperature Maximum Celsius: 70°C
  • Max Clamp Voltage: Not applicable
  • On-State Current: Not applicable


Product Identification
  • UPC: 78590148683
  • GTIN: 00785901486831