Eaton Cutler Hammer NDC312T33W 1200A 3-Pole Molded Case Circuit Breaker – LS Trip Unit – Bolt-On – 600VAC

The Eaton / Cutler Hammer NDC312T33W is a 1200 Amp, 3-pole molded case circuit breaker engineered for high-performance protection in demanding industrial and commercial electrical distribution systems. Built on the NDC frame platform, this breaker features a Digitrip RMS 310 electronic non-interchangeable trip unit with LS (Long Delay, Short Delay) protection functions. It also offers ultra-high interrupting capacity and current-limiting technology, ensuring superior protection against overloads and short circuits while minimizing fault current impact on connected equipment.

Product Specifications

• Brand: Eaton / Cutler Hammer
• Model: NDC312T33W
• Product Type: Molded Case Circuit Breaker
• Frame Style: NDC
• Frame Type: N
• Rated Current: 1200 Amperes
• Number of Poles: 3
• Mounting Type: Bolt-On
• Trip Unit Type: Digitrip RMS 310 (Electronic Non-Interchangeable)
• Trip Functions: LS (Long Delay, Short Delay)
• Current Limiting: Yes
• Interrupting Capacity: Ultra High
• Operating Temperature Rating: 40°C
• Frequency: 50/60 Hz
• Standard Lug Type: Without Terminals Standard
• Warranty: One Year

Technical Specifications

• L – Long Delay Pickup: Adjustable overload protection controlled by the rating plug
• S – Short Delay Pickup: Adjustable with fixed short delay time (I²t response) or adjustable flat response delay
• Current Limiting Design: Reduces peak fault current and protects downstream electrical components
• Trip Setting Range: 2–8 times the continuous ampere rating
• Designed for heavy-duty industrial power distribution applications

Voltage and Ratings

• Maximum Voltage: 600 VAC
• Frequency: 50/60 Hz
• Current Rating: 1200 Amperes
• Interrupting Capacity:
• • 200 kA @ 240 VAC
  • 100 kA @ 480 VAC
  • 50 kA @ 600 VAC

Product Data

• Manufacturer: Eaton / Cutler Hammer
• Model Number: NDC312T33W
• Frame Series: NDC Frame
• Connection Type: Bolt-On
• Pole Configuration: 3 Pole
• Rated Current: 1200A
• Voltage Rating: 600 VAC
• Standard Lug Type: Without Terminals

Important Note

This circuit breaker requires a rating plug to operate, which is not included with the unit. Please confirm the availability and pricing of the appropriate rating plug before ordering if installation is required. The product image represents a base model for identification purposes only. If accessories are purchased together with the breaker, they can be installed according to your required configuration at no additional cost during order processing.

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

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