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Square D MHL364501287 - 3-Pole 450A Circuit Breaker (600V Thermal Magnetic)

Square D
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Square D MHL364501287 is a 3-pole molded case circuit breaker designed for overcurrent protection in industrial electrical distribution systems. It is rated for 450A at 600VAC and features a thermal magnetic trip unit with LI (Long-Time and Instantaneous) functions, providing reliable protection against sustained overloads and short circuits. The breaker has 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 a feed-thru connection with unit mount lug installation. It is UL listed and current limiting, with an interrupting rating of 65kA at 480V, 25kA at 600V, and 100kA at 240V. This breaker is suitable for use in switchboards, panelboards, and other industrial power distribution equipment requiring a 3-phase, 600V rated device.

Key Features & Specifications
  • Manufacturer: Square D
  • Item Subcategory: Molded Case
  • Family: MHL Series
  • Type: MHL
  • Poles: 3
  • Current Rating: 450A
  • Voltage Rating: 600V
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: M Frame
  • Connection: Feed-Thru
  • Mounting Type: Unit Mount Lug
  • Phase: 3
  • AIC rating: 65kA@480V
  • Interrupt Rating: 65kA @ 480V, 25kA @ 600V, 100kA @ 240V
  • 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
  • UL Listed
  • Current Limiting


Part Number: MHL364501287