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440R-EM4R2

United Fuses
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Square D 440R-EM4R2 is a 4-pole molded case circuit breaker designed for reliable electrical protection in commercial and industrial power distribution systems. It is rated for 400A continuous current at 480V AC, utilizing a thermal-magnetic trip unit for overcurrent protection. The unit weighs 5.19 lb and is constructed for panelboard mounting as part of the Square D 440R series. It is UL 489 listed and CSA certified for safety and performance standards. Typical applications include protecting branch circuits and main feeders in three-phase systems with neutral.

Key Features & Specifications
  • Type: Molded case circuit breaker
  • 400A continuous current rating
  • 480V AC voltage rating
  • 4-pole configuration
  • Thermal-magnetic trip unit
  • Panelboard mounting
  • Square D 440R series
  • UL 489 listed
  • CSA certified
  • Weight: 5.19 lb


Square D 440R-EM4R2 - 400A 4-Pole MCCB (480V AC)