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Square D MHB36450 - Molded Case Circuit Breaker 450A 600V

Square D
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Square D MHB36450 is a 3-pole molded case circuit breaker from the I-Line family, designed for overcurrent protection in industrial and commercial power distribution systems. It delivers 450A of current at 600V with a thermal magnetic trip unit providing long-time and instantaneous (LI) protection functions, and offers a high interrupting capacity of 65kA at 480V. The breaker features an M Frame size, measures 12.86 inches in height, 8.27 inches in width, and 8.05 inches in depth, weighs 40 lb, and uses an I-Line style plug-in connection for secure mounting in panelboards and switchboards. It complies with industry standards for reliable performance in demanding electrical environments. Typical applications include main or feeder protection in commercial buildings, industrial plants, and heavy machinery power distribution.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker
  • Manufacturer: Square D
  • Family: I-Line
  • Model: MHB
  • Poles: 3
  • Current Rating: 450A
  • Voltage Rating: 600V
  • Frame Size: M Frame
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Connection: I-Line Style Plug-In
  • AIC Rating: 65kA@480V
  • Phase: 3
  • 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
  • Mounting Type: Panel Mount
  • Terminal Connection: Load side lug
  • Wire Gauge: #3/0 AWG-500KCmil
  • Temperature Rating: 40°C


Part Number: MHB36450