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Square D MHL3612001288 - 1200A 3-Pole M Frame Breaker

Square D
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Square D MHL3612001288 is a 3-pole molded case circuit breaker designed for overcurrent protection in industrial power distribution systems. It is rated for 1200A at 600VAC, with a 65kA interrupting capacity at 480VAC, and features a thermal-magnetic trip mechanism providing LI (Long-Time and Instantaneous) protection. The breaker has an M Frame size, measures 8.05 inches deep, 8.27 inches wide, and 12.86 inches high, weighs 40 lb, and includes a 48VDC shunt trip for remote tripping capability. It is built for feed-thru connection and 3-phase operation, complying with industry standards for robust industrial applications. Typical uses include main or feeder protection in switchboards, panelboards, and motor control centers.

Key Features & Specifications
  • Type: MHL Series molded case circuit breaker with thermal-magnetic protection
  • Voltage Rating: 600VAC
  • Current Rating: 1200A
  • 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
  • Poles: 3
  • Phase: 3
  • Connection: Feed-Thru
  • Protection: Thermal Magnetic with LI (Long-Time and Instantaneous) functions
  • AIC Rating: 65kA@480V
  • Frame Size: M Frame
  • Additional Info: Complete with 48VDC shunt trip
  • Circuit Breaker Mounting Style: Fixed
  • Terminal Connection: Feed-Thru
  • Frequency Rating: 50/60 Hz
  • Phase Connection: 3-Phase
  • Standards: UL 489, CSA C22.2 No. 5
  • Installation Type: Panelboard or Switchboard
  • Breaker Frame: M Frame
  • Trip Type: Thermal Magnetic
  • Operating Temperature Maximum Celsius: 40°C


Product Identification
  • UPC: Not available
  • GTIN: Not available