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Eaton ND312T77W - Molded Case Circuit Breaker 1200A 600V

Cutler Hammer
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The Cutler Hammer ND312T77W is a 3-pole, 1200A molded case circuit breaker from Eaton's Series C family, designed to provide solid-state protection with LSIGA functions—Long-Time, Short-Time, Instantaneous, and Ground Fault Alarm—for industrial power distribution systems. It operates at a voltage rating of 600V and a current rating of 1200A, with an AIC rating of 50kA at 480V, supporting 3-phase applications. The unit features a bolt-on connection, an N Frame size, and measures 5.5 inches in length/depth, 8.25 inches in height, and 8.25 inches in width, weighing 48 lb. It is HACR rated and manufactured in the United States, ensuring compliance with industry standards for reliable overcurrent and ground fault protection in heavy-duty environments. This breaker is typically applied in commercial and industrial settings requiring precise, adjustable trip settings and high interrupting capacity.

Key Features & Specifications
  • Type: Molded Case, Solid State Protection
  • Voltage Rating: 600V
  • Current Rating: 1200A
  • Dimensions: 5.5 in x 8.25 in x 8.25 in (Length/Depth x Height x Width)
  • Standards: HACR Rated
  • Applications: Industrial power distribution, ground fault protection
  • Switch Type: Circuit Breaker
  • Configuration: 3-Phase
  • Coil Voltage Maximum: Not specified
  • Temp Rating: Not specified
  • Shipping Dimensions: Not specified
  • Phase: 3
  • Voltage: 600V
  • Amperage: 1200A
  • AIC rating: 50kA@480V
  • Connection: Bolt-On
  • Poles: 3
  • Protection: Solid State
  • Functions: LSIGA - Long-Time, Short-Time, Instantaneous and Ground Fault Alarm
  • Frame Size: N Frame
  • Trip Type: Solid State
  • Panel Type: Not specified
  • Breaker Type: Molded Case
  • Control Voltage Minimum: Not specified
  • Control Voltage Maximum: Not specified
  • MCM Size: Not specified
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not specified
  • Insulation Temperature: Not specified
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not specified
  • Class Rating: Not specified
  • Diameter: Not specified
  • Velocity: Not specified
  • Clip Center: Not specified
  • Clas: Not specified
  • Mounting: Not specified
  • Hz: Not specified
  • Coil Material: Not specified
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: Not specified
  • Dist Voltage: Not specified
  • Bucket Size: Not specified
  • Bucket Style: Not specified
  • Bucket Type: Not specified
  • Full Load Amp Maximum: Not specified
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not specified
  • Coil Voltage Minimum: Not specified
  • Wire: Not specified
  • Amperage Maximum: Not specified
  • Amperage Minimum: Not specified
  • Nema Rating: Not specified
  • Switch Style: Not specified
  • Wire Size: Not specified
  • Certification: HACR Rated
  • Circuit Breaker Mounting Style: Not specified
  • Terminal Connection: Not specified
  • Frequency Rating: Not specified
  • Phase Connection: 3-Phase
  • Standards: HACR Rated
  • Compatible Frames: N Frame
  • Installation Type: Not specified
  • Item QTY: Not specified
  • Nema Starter Size: Not specified
  • Breaker Frame: N Frame
  • Current Rating: 1200A
  • Reverse Standoff Voltage: Not specified
  • Watts: Not specified
  • Peak Pulse Current: Not specified
  • Breakdown Voltage (MIN VBR@IT ) (V): Not specified
  • Breakdown Voltage (VBR@IT) (V): Not specified
  • Polarity: Not specified
  • Operating Temperature Maximum Celsius: Not specified
  • Max Clamp Voltage: Not specified
  • On-State Current: Not specified


Product Identification
  • UPC: 786679050200
  • GTIN: 00786679050200