Eaton Cutler Hammer CNDC312T32W 1200A 3 Poles Molded Case Circuit Breaker – Bolt-On Mount – 600VAC

The Eaton / Cutler Hammer CNDC312T32W Molded Case Circuit Breaker is a high-performance power protection device designed for demanding industrial and commercial electrical systems. Built with the CNDC frame style and equipped with the advanced Digitrip RMS 310 electronic trip unit, this breaker provides accurate protection through Long Delay, Short Delay, and Instantaneous (LSI) trip functions. With a 1200 Amp rating at 40°C and ultra-high interrupting capacity, it is engineered to protect electrical circuits from overloads, short circuits, and faults while ensuring reliable operation in heavy-duty power distribution environments.

Product Specifications

• Brand: Eaton / Cutler Hammer
• Model: CNDC312T32W
• Breaker Type: Molded Case Circuit Breaker (MCCB)
• Frame Style: CNDC Frame
• Trip Unit: Digitrip RMS 310 Electronic Non-Interchangeable
• Trip Functions: LSI (Long Delay, Short Delay, Instantaneous)
• 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 fixed or adjustable delay time
• Short Delay Response: I²T (inverse time) or flat response
• Instantaneous Pickup: Adjustable by setting short delay to instantaneous
• Frame Temperature Rating: 40°C
• Frequency: 50/60 Hz
• Frame Type: N Frame

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
• Interrupting Capacity: Ultra High
• Application: Industrial and commercial power distribution systems

Important Note

This circuit breaker requires a rating plug to operate, which is not included with the base unit. Please ensure that the appropriate rating plug is selected and installed before use. 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 to match your required configuration prior to shipment.

Returns are easy

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

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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.