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Square D LDA36400U44XEN - Molded Case Circuit Breaker 400A 3-Pole

Square D
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Square D LDA36400U44XEN is a Schneider Electric PowerPact L molded case circuit breaker designed for primary power distribution protection in industrial and commercial applications. This 3-pole, 400A unit operates at 600VAC with a solid-state LSIG trip unit providing long-time, short-time, instantaneous, and ground fault protection, and features an interrupting rating of 18kA at 480V. The breaker measures 13.39 inches in height, 4.44 inches in width, and 3.09 inches in depth, weighs 5.19 lb, and uses an I-Line plug-in mounting with lug terminal connections. It is certified to UL, CSA, NEMA, NOM, and IEC standards, and operates within a temperature range of 28 to 158°F (-2 to 70°C). Typical applications include main or feeder protection in switchboards, panelboards, and industrial control panels.

Key Features & Specifications
  • Manufacturer: Schneider Electric
  • Item Subcategory: Molded Case
  • Family: Powerpact
  • Type: LDA
  • Dimensions: Height 13.39 in (340 mm) x Depth 3.09 in (78.49 mm) x Width 4.44 in (112.78 mm)
  • Weight: 5.19 lb
  • Terminal Connection: I-Line, Lug
  • Functions: LSIG - Long-Time, Short-Time, Instantaneous and Ground Fault
  • Frame Size: L Frame
  • Voltage Rating: 600V
  • Poles: 3
  • Standards: UL, CSA, NEMA, NOM, IEC
  • Protection: Solid State
  • Certification: UL, CSA, NEMA, NOM, IEC
  • AIC rating: 18kA@480V
  • Phase: 3
  • Temp Rating: 28-158 °F (-2-70 °C)
  • Current Rating: 400A
  • Mounting Type: Plug-In, I-Line
  • Interrupt Rating: 14kA at 600 VAC
  • Trip Unit: Micrologic 6.3A
  • Continuous Current Rating: 80%
  • Certifications: UL 489


LDA36400U44XEN