Eaton Cutler Hammer CNDC312T35W 1200A 3 Poles Molded Case Circuit Breaker – Bolt-On Mount – 600VAC

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SKU: CNDC312T35W-CR GTIN/UPC: 786679166123
Regular price $11,599.00

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The Eaton / Cutler Hammer CNDC312T35W Molded Case Circuit Breaker is a high-capacity protection device engineered for demanding industrial and commercial power distribution systems. Built with the CNDC frame design and equipped with the advanced Digitrip RMS 310 electronic trip unit, this breaker provides precise circuit protection through Long Delay, Short Delay, and Ground Fault (LSG) functions. Rated at 1200 Amperes at 40°C and featuring ultra-high interrupting capacity, the breaker ensures reliable protection against overloads, short circuits, and ground faults, making it suitable for heavy-duty electrical installations requiring accurate and dependable protection.

Product Specifications

  • Brand: Eaton / Cutler Hammer
  • Model: CNDC312T35W
  • Breaker Type: Molded Case Circuit Breaker (MCCB)
  • Frame Style: CNDC Frame
  • Trip Unit: Digitrip RMS 310 Electronic Non-Interchangeable
  • Trip Functions: LSG (Long Delay, Short Delay, Ground Fault)
  • Mount Type: Bolt-On
  • Rated Current: 1200 Amperes
  • Poles: 3 Pole
  • Rating Plug: Not Included
  • Standard Lug Type: Not Included
  • Warranty: 1 Year

Technical Specifications

  • Trip Technology: Electronic Trip Unit (Digitrip RMS 310)
  • Long Delay Pickup: Adjustable via rating plug
  • Short Delay Pickup: Adjustable with selectable delay response
  • Short Delay Response: I²T (inverse time) or flat response
  • Ground Fault Pickup: Adjustable
  • Ground Fault Delay: Adjustable with flat response
  • Frame Temperature Rating: 40°C
  • Frame Type: N Frame
  • Frequency: 50/60 Hz

Voltage and Ratings

  • Maximum Voltage: 600 VAC
  • Frequency Rating: 50/60 Hz
  • Interrupting Capacity:
    • 200 kA @ 240 VAC
    • 100 kA @ 480 VAC
    • 50 kA @ 600 VAC

Product Data

  • Manufacturer: Eaton / Cutler Hammer
  • Product Series: CNDC
  • Amperage Rating: 1200 A
  • Number of Poles: 3
  • Mounting Style: Bolt-On
  • Frame Type: N Frame
  • Application: Industrial and commercial electrical distribution systems requiring advanced ground fault protection

Important Note

This circuit breaker requires a rating plug to operate, which is not included with the base unit. Ensure that the correct rating plug is installed prior to operation. Product images may represent a base configuration and are provided for identification purposes only. If accessories are ordered with the breaker, they can typically be installed before shipment to match your required configuration.



  • Type Circuit Breakers
  • Vendor Eaton Cutler-Hammer
  • Brand Eaton Cutler Hammer

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You may return items within 10 days of delivery for a refund.

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My Circuit Breakers offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

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My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.

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