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Square D MH36400 - 400A Molded Case Breaker (65kA AIC, 600V)

Square D
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The Square D MH36400 is a molded case circuit breaker designed to provide reliable overcurrent and short-circuit protection for three-phase industrial power distribution systems. It features a 400A current rating and a 600V voltage rating, housed within a compact M-frame design measuring 326.64 mm H x 210.06 mm W x 204.47 mm D and weighing 29 lb. This thermal magnetic breaker, offering long-time and instantaneous (LI) protection functions, complies with UL, CSA, NEMA, NOM, and IEC 60947-2 standards. Its I-Line style plug-in connection and 65kA interrupting capacity at 480V make it suitable for main feeder and branch circuit protection in industrial panels and switchboards, operating in temperatures from -25 to 70 °C.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, Thermal Magnetic Protection, I-Line Plug-In Connection
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Dimensions: 326.64 mm H x 210.06 mm W x 204.47 mm D (12.86 in x 8.27 in x 8.05 in)
  • Standards: UL, CSA, NEMA, NOM-003-SCFI-2000, IEC 60947-2
  • Applications: Industrial Power Distribution, Main Feeders, Branch Circuits
  • Switch Type: Circuit Breaker
  • Configuration: Fixed
  • Phase: 3
  • Poles: 3
  • AIC Rating: 65kA @ 480V
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous (LI)
  • Frame Size: M Frame
  • Trip Type: Thermal Magnetic
  • Connection: I-Line Style Plug-In
  • Wire Size: 3 x AWG 3/0...3 x 500 kcmil (aluminium/copper)
  • Certification: UL, CSA, NOM
  • Temp Rating: -25 to 70 °C (-13 to 158 °F)
  • Weight: 29 lb
  • Family: I-Line
  • Country of Origin: Mexico


Product Identification
  • UPC: 785901339526
  • GTIN: 00785901339526