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Square D MHL3645025DC1679 - 3-Pole 450A Thermal Magnetic Breaker

Square D
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Square D MHL3645025DC1679 is a 3-pole molded case circuit breaker from the MHL Series, designed to provide thermal magnetic overcurrent protection for commercial and industrial power distribution systems. It is rated for 600V AC and 450A, with a 20kA interrupting capacity at 500V, and utilizes a feed-thru connection with LI (Long-Time and Instantaneous) trip functions. The unit has an M Frame size, measures 12.86 inches in height, 8.27 inches in width, and 8.05 inches in depth, and weighs 54 lb. This breaker complies with UL standards and is suitable for use in switchgear and panelboard applications requiring reliable circuit protection.

Key Features & Specifications
  • Type: MHL
  • Poles: 3
  • Voltage Rating: 600V
  • Current Rating: 450A
  • AIC Rating: 20kA@500V
  • Protection: Thermal Magnetic
  • Connection: Feed-Thru
  • Frame Size: M Frame
  • Functions: LI - Long-Time and Instantaneous
  • 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: 54 lb
  • Certifications: UL Listed
  • Accessories: Auxiliary and Undervoltage


Part Number: MHL3645025DC1679