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Eaton ND312T77W - Molded Case Circuit Breaker 1200A 3-Pole

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Eaton ND312T77W is a 3-pole molded case circuit breaker from the Series C family, designed for advanced power distribution and protection in industrial environments. It is rated for 1200A at 600VAC, with a solid-state LSIGA trip unit providing long-time, short-time, instantaneous, and ground fault alarm functions. The unit has an N Frame, measures 5.5 inches in depth by 8.25 inches in height and width, weighs 48 lb, and features a bolt-on connection. It is HACR rated, UL listed, and offers an interrupting capacity of 50kA at 480VAC, meeting stringent industry standards. This breaker is typically applied in commercial and industrial settings requiring reliable overcurrent and ground fault protection for three-phase systems.

Key Features & Specifications
  • Manufacturer: Eaton
  • Item Subcategory: Molded Case
  • Family: Series C
  • Country of Origin: United States
  • Type: ND
  • Dimensions: 5.5 in x 8.25 in x 8.25 in (Length/Depth x Height x Width)
  • Weight: 48 lb
  • Functions: LSIGA - Long-Time, Short-Time, Instantaneous and Ground Fault Alarm
  • Frame Size: N Frame
  • Voltage Rating: 600V
  • Poles: 3
  • Connection: Bolt-On
  • Protection: Solid State
  • Certification: HACR Rated
  • AIC rating: 50kA@480V
  • Phase: 3
  • Current Rating: 1200A
  • Amperage: 1200 A
  • Voltage Rating: 600 Vac
  • Number of Poles: 3
  • Frame: NG
  • Trip Unit: Electronic LSIA
  • Interrupt Rating: 100 kAIC at 240 Vac, 65 kAIC at 480 Vac
  • Frequency Rating: 50/60 Hz
  • Type: OPTIM 750 design
  • UL Listed


Product Identification
  • UPC: 786679050200
  • GTIN: 00786679050200