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Square D MHL366001291 - Molded Case Circuit Breaker 600A 3P (65kA AIC)

Square D
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Square D MHL366001291 is a molded case circuit breaker designed for providing reliable overcurrent and short-circuit protection in demanding three-phase industrial power distribution systems. It features a 600A current rating and a 600V AC voltage rating, housed within a robust M-frame construction measuring 204.47 mm in depth, 210.06 mm in width, and 326.64 mm in height with a weight of 40 lb. The breaker complies with industry standards for safety and performance, utilizing a thermal-magnetic trip unit with long-time and instantaneous (LI) protection functions. It is typically applied in panelboards and switchboards for main feeder protection, featuring a 65kA interrupting capacity at 480V AC and a factory-installed 120V shunt trip (MA11021) for remote disconnection.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, MHL Series, Thermal-Magnetic Protection
  • Voltage Rating: 600V AC
  • Current Rating: 600A
  • Dimensions: 204.47 mm D x 210.06 mm W x 326.64 mm H (8.05 in x 8.27 in x 12.86 in)
  • Standards: Industry standards for circuit protection
  • Applications: Main feeder protection in industrial panelboards and switchboards
  • Switch Type: Circuit Breaker
  • Configuration: Fixed
  • Phase: 3
  • Amperage: 600A
  • AIC Rating: 65kA @ 480V AC
  • Connection: Feed-Thru
  • Poles: 3
  • Protection: Thermal Magnetic
  • Functions: Long-Time and Instantaneous (LI)
  • Frame Size: M Frame
  • Trip Type: Thermal-Magnetic
  • Breaker Type: Molded Case
  • Additional Info: Complete with MA11021 120V Shunt Trip
  • Weight: 40 lb


Product Identification
  • GTIN: 00785901530121