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Square D MHB36400 - Molded Case 400A 600V 3-Pole

Square D
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Square D MHB36400 is a 3-pole molded case circuit breaker from the I-Line family, designed for thermal magnetic protection in industrial power distribution systems. It is rated for 600V AC, 400A continuous current, with an interrupting capacity of 65kA at 480V AC, providing LI (Long-Time and Instantaneous) protection functions. The unit features an M Frame size, I-Line style plug-in connection, and measures 8.05 in depth, 8.27 in width, and 12.86 in height, weighing 40 lb. This breaker complies with applicable UL and NEMA standards for molded case circuit breakers. It is typically used in switchboards, panelboards, and motor control centers for overcurrent protection in commercial and industrial facilities.

Key Features & Specifications
  • Type: Molded Case, Thermal Magnetic, I-Line
  • Voltage Rating: 600V AC
  • Current Rating: 400A
  • Poles: 3
  • Phase: 3
  • AIC Rating: 65kA@480V
  • Frame Size: M Frame
  • Functions: LI - Long-Time and Instantaneous
  • Connection: I-Line Style Plug-In
  • Dimensions: Depth 8.05 in (204.47 mm) Width 8.27 in (210.06 mm) Height 12.86 in (326.64 mm)
  • Weight: 40 lb
  • Installation Type: Plug-In
  • Circuit Breaker Mounting Style: I-Line
  • Terminal Connection: I-Line
  • Frequency Rating: 50/60 Hz
  • Standards: UL, NEMA
  • Applications: Switchboards, panelboards, motor control centers


Product Identification
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