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Square D LLA36400U53X - Molded Case 400A 600V 3-Pole

Square D
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The Square D LLA36400U53X is a 400A, 3-pole molded case circuit breaker from the Powerpact family, designed for solid-state protection of industrial power distribution systems. It provides LSI (Long-Time, Short-Time, and Instantaneous) trip functions at a voltage rating of 600V and an AIC rating of 100kA at 480V, with a 3-phase, 60 Hz configuration. This unit measures 13.4 in (340 mm) x 5.5 in (140 mm) x 4.3 in (110 mm) (H x W x D), weighs 17 lb, and features an I-Line style plug-in connection for AWG 3/0 to 500 kcmil aluminum or copper wire. It complies with UL, CSA, NEMA, NOM-003-SCFI-2000, and IEC 60947-2 standards, with an operating temperature range of 28-158 °F (-2-70 °C). Typical applications include main or feeder protection in commercial and industrial switchboards and panelboards.

Key Features & Specifications
  • Type: 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 industrial switchboards and panelboards
  • Switch Type: I-Line Style Plug-In
  • Configuration: 3-Pole, 3-Phase
  • Coil Voltage Maximum: Not applicable (solid state trip)
  • Temp Rating: 28-158 °F (-2-70 °C)
  • Shipping Dimensions: Not specified
  • Phase: 3
  • Voltage: 600V
  • Amperage: 400A
  • AIC rating: 100kA@480V
  • Connection: I-Line Style Plug-In
  • Poles: 3
  • Protection: Solid State
  • Functions: LSI - Long-Time, Short-Time and Instantaneous
  • Frame Size: Powerpact
  • Trip Type: Solid State
  • Panel Type: Not specified
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not applicable
  • Control Voltage Maximum: Not applicable
  • MCM Size: 500 kcmil maximum
  • 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: I-Line Style Plug-In
  • Hz: 60 Hz
  • Coil Material: Not applicable
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: 400A
  • Dist Voltage: Not specified
  • Bucket Size: Not specified
  • Bucket Style: Not specified
  • Bucket Type: Not specified
  • Full Load Amp Maximum: 400A
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not applicable
  • Coil Voltage Minimum: Not applicable
  • Wire: AWG 3/0...500 kcmil aluminium/copper
  • Amperage Maximum: 400A
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: I-Line Style Plug-In
  • Wire Size: AWG 3/0...500 kcmil aluminium/copper
  • Certification: UL, CSA, NOM
  • Circuit Breaker Mounting Style: I-Line Style Plug-In
  • Terminal Connection: I-Line Style Plug-In
  • Frequency Rating: 60 Hz
  • Phase Connection: 3-Phase
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Compatible Frames: Powerpact
  • Installation Type: Plug-In
  • Item QTY: 1
  • Nema Starter Size: Not applicable
  • Breaker Frame: Powerpact
  • 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 applicable
  • Operating Temperature Maximum Celsius: 70 °C
  • Max Clamp Voltage: Not specified
  • On-State Current: Not specified


Product Identification
  • UPC: 606486284011
  • GTIN: 03606490000000