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Square D LGA36400U43XTBYB - Molded Case Breaker 400A 480V

Square D
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The Square D LGA36400U43XTBYB is a Powerpact molded case circuit breaker from Schneider Electric designed for primary overcurrent protection in industrial power distribution systems. This 3-pole, 400A unit operates at 480V with a solid-state LSI trip unit providing Long Time, Short Time, and Instantaneous protection, and delivers a 35kA interrupting capacity at 480V. It features an L Frame construction with I-Line and lug terminal connections, measuring 13.39 inches in height, 4.44 inches in width, and 3.09 inches in depth, weighing 5.19 lb. The breaker is certified to UL, CSA, NEMA, NOM, and IEC standards, with an operating temperature range of 28 to 158 °F (-2 to 70 °C). This unit is suited for 3-phase applications in commercial and industrial settings requiring precise solid-state trip coordination.

Key Features & Specifications
  • Type: Powerpact LGA Molded Case Circuit Breaker
  • Voltage Rating: 480V
  • Current Rating: 400A
  • Dimensions: Height 13.39 in (340 mm) x Depth 3.09 in (78.49 mm) x Width 4.44 in (112.78 mm)
  • Standards: UL, CSA, NEMA, NOM, IEC
  • Applications: Industrial power distribution, motor protection, feeder circuits
  • Switch Type: Solid State Trip
  • Configuration: 3-Pole
  • Coil Voltage Maximum: Not specified
  • Temp Rating: 28-158 °F (-2-70 °C)
  • Shipping Dimensions: Not specified
  • Phase: 3
  • Voltage: 480V
  • Amperage: 400A
  • AIC rating: 35kA@480V
  • Connection: I-Line, Lug
  • Poles: 3
  • Protection: Solid State
  • Functions: LSI - Long Time, Short Time and Instantaneous Trip
  • Frame Size: L Frame
  • Trip Type: Solid State
  • Panel Type: Not specified
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not specified
  • Control Voltage Maximum: Not specified
  • MCM Size: Not specified
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not specified
  • 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 specified
  • 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 specified
  • Coil Voltage Minimum: Not specified
  • Wire: Not specified
  • Amperage Maximum: Not specified
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Not specified
  • Wire Size: Not specified
  • Certification: UL, CSA, NEMA, NOM, IEC
  • Circuit Breaker Mounting Style: Not specified
  • Terminal Connection: I-Line, Lug
  • Frequency Rating: Not specified
  • Phase Connection: Not specified
  • Standards: UL, CSA, NEMA, NOM, IEC
  • Compatible Frames: Not specified
  • Installation Type: Not specified
  • Item QTY: Not specified
  • Nema Starter Size: Not specified
  • Breaker Frame: L Frame
  • Current Rating: 400A
  • 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: Not specified
  • Max Clamp Voltage: Not specified
  • On-State Current: Not specified


Product Identification
  • UPC: Not specified
  • GTIN: Not specified