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Square D LGL36400CU44X - Molded Case Circuit Breaker 400A 600V

Square D
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The Square D LGL36400CU44X is a 400A, 3-pole molded case circuit breaker from the Powerpact family, designed for primary overcurrent and ground fault protection in industrial power distribution systems. It operates at a maximum voltage of 600V AC with a 35kA interrupting capacity at 480V, utilizing solid-state LSIG trip functions (Long-Time, Short-Time, Instantaneous, and Ground Fault) for precise coordination. The unit features a compact L Frame design measuring 13.4 x 5.5 x 4.3 inches (340 x 140 x 110 mm) and weighing 14.0 lb, with a feed-thru connection and lug terminals accepting 2 x AWG 2/0 to 500 kcmil aluminum or copper conductors. It is 100% rated for continuous load, certified to UL, CSA, NEMA, NOM-003-SCFI-2000, and IEC 60947-2 standards, and operates within a temperature range of 28 to 158°F (-2 to 70°C). This breaker is suited for main or feeder protection in commercial and industrial switchboards, panelboards, and motor control centers requiring adjustable trip settings and ground fault detection.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Powerpact L Frame, Solid State Trip
  • 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: Industrial power distribution, main and feeder protection, motor control centers
  • Switch Type: Molded Case
  • Configuration: 3-Pole
  • Coil Voltage Maximum: N/A (Solid State Trip)
  • Temp Rating: 28-158°F (-2-70°C)
  • Shipping Dimensions: 13.4 x 5.5 x 4.3 in
  • Phase: 3
  • Voltage: 600V
  • Amperage: 400A
  • AIC rating: 35kA@480V
  • Connection: Feed-Thru
  • Poles: 3
  • Protection: LSIG (Long-Time, Short-Time, Instantaneous, Ground Fault)
  • Functions: Solid State Trip
  • Frame Size: L Frame
  • Trip Type: Solid State
  • Panel Type: N/A
  • Breaker Type: 100% Rated
  • Control Voltage Minimum: N/A
  • Control Voltage Maximum: N/A
  • MCM Size: 2 x AWG 2/0...500 kcmil
  • Metal Type: N/A
  • Panel Style: N/A
  • Bus Type: N/A
  • Fuse Class: N/A
  • Insulation Temperature: N/A
  • Inductance: N/A
  • Impedance: N/A
  • Barrels: N/A
  • Class Rating: N/A
  • Diameter: N/A
  • Velocity: N/A
  • Clip Center: N/A
  • Clas: N/A
  • Mounting: N/A
  • Hz: N/A
  • Coil Material: N/A
  • Horse Power: N/A
  • Aux Contacts: N/A
  • CPT: N/A
  • Full Load Amps: N/A
  • Dist Voltage: N/A
  • Bucket Size: N/A
  • Bucket Style: N/A
  • Bucket Type: N/A
  • Full Load Amp Maximum: N/A
  • Full Load Amp Minimum: N/A
  • Enclosure: N/A
  • Relay Style: N/A
  • Coil Voltage Minimum: N/A
  • Wire: N/A
  • Amperage Maximum: 400A
  • Amperage Minimum: N/A
  • Nema Rating: N/A
  • Switch Style: N/A
  • Wire Size: 2 x AWG 2/0...500 kcmil
  • Certification: UL, CSA, NOM
  • Circuit Breaker Mounting Style: N/A
  • Terminal Connection: Lug
  • Frequency Rating: N/A
  • Phase Connection: 3-Phase
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Compatible Frames: L Frame
  • Installation Type: Fixed
  • Item QTY: 1
  • Nema Starter Size: N/A
  • Breaker Frame: L Frame
  • Current Rating: 400A
  • Reverse Standoff Voltage: N/A
  • Watts: N/A
  • Peak Pulse Current: N/A
  • Breakdown Voltage (MIN VBR@IT ) (V): N/A
  • Breakdown Voltage (VBR@IT) (V): N/A
  • Polarity: N/A
  • Operating Temperature Maximum Celsius: 70°C
  • Max Clamp Voltage: N/A
  • On-State Current: N/A


Product Identification
  • UPC: 785901005810