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Square D MHL3645031DC2351 - Molded Case Breaker 450A 600V

Square D
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Square D MHL3645031DC2351 is a three-pole molded case circuit breaker from the MHL Series, designed to provide overcurrent protection via a thermal magnetic trip unit with long-time and instantaneous (LI) functions. Rated for 450A at a maximum voltage of 600V, it delivers a 20kA interrupting capacity at 500VDC for DC load and floating voltage environments. Housed in an M Frame, this unit measures 12.86 inches in height, 8.27 inches in width, and 8.05 inches in depth, weighing 40 lb, and features a feed-thru connection with line and load lug terminals accommodating wire sizes from 3/0 AWG to 500 kcmil aluminum or copper. It is UL Listed and CSA Approved for safety compliance. This breaker is suited for industrial power distribution applications requiring reliable DC circuit protection and is complete with a MA11037 277/480V shunt trip and MA11212 1A/1B auxiliary switch.

Key Features & Specifications
  • Type: MHL
  • Item Subcategory: Molded Case
  • Family: MHL Series
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: M Frame
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: Feed-Thru
  • Protection: Thermal Magnetic
  • AIC rating: 20kA@500VDC
  • Phase: 3
  • Current Rating: 450A
  • Additional Info: complete with MA11037- 277/480V shunt trip and MA11212 1A/1B auxiliary switch
  • Depth: 8.05 in (204.47 mm)
  • Width: 8.27 in (210.06 mm)
  • Height: 12.86 in (326.64 mm)
  • Weight: 40 lb
  • Terminal Type: Line and Load Lugs
  • Wire Size Range: 3/0 AWG to 500 kcmil (Aluminum/Copper)
  • Certifications: UL Listed, CSA Approved


Part Number: MHL3645031DC2351