NDC312T36W - 1200 Amp Circuit Breaker

NDC312T36W - 1200 Amp Circuit Breaker

The NDC312T36W is a 1200-amp, 3-pole N-Frame molded-case circuit breaker for use in compatible electrical distribution equipment. It’s a Type NDC breaker with a non-interchangeable trip unit and includes independently adjustable short-time pickup and delay, plus ground-fault protection.

Interrupting capacity varies by system voltage: 65kA at 600VAC, 100kA at 480VAC, and 200kA at 240VAC. The breaker is also HACR rated.

If you’re replacing an existing NDC breaker, the physical size is another important part of the match. The NDC312T36W measures 16 inches high, 8.25 inches wide, and 5.5 inches deep. Before installation, compare the frame size, amperage, pole configuration, voltage, interrupting rating, trip requirements, and dimensions with the breaker already in the equipment.

The catalog number does not include the rating plug or lug terminals, so you must check those items separately. With its molded case construction and established N-Frame design, this breaker is built to last in the applications it was designed for.

Key Features and Benefits

• 1200-amp, 3-pole configuration for compatible three-phase electrical systems
• Type NDC, N-Frame design for equipment requiring this specific breaker configuration
• Interrupting ratings of 65kA at 600VAC, 100kA at 480VAC, and 200kA at 240VAC
• Independently adjustable short-time pickup and delay
• Ground fault protection
• Non-interchangeable trip unit
• HACR-rated
• Molded case construction
• Rating plug and lug terminals are not included in the catalog number
  

Technical Specifications

• Part Number: NDC312T36W
  
• Type: NDC
  
• Frame: N-Frame
  
• Breaker Type: Molded Case
  
• Amperage: 1200A
  
• Poles: 3
  
• A.I.C. @ 600VAC: 65kA
  
• A.I.C. @ 480VAC: 100kA
  
• A.I.C. @ 240VAC: 200kA
  
• Height: 16.0 in.
  
• Width: 8.25 in.
  
• Depth: 5.5 in.
  
• Trip Unit: Non-interchangeable
  
• Short-Time Pickup: Independently adjustable
  
• Short-Time Delay: Independently adjustable
  
• Ground Fault Protection: Yes
  
• HACR Rated: Yes
  

Material Compliance and Certifications

• The supplied specifications identify the NDC312T36W as HACR rated. No additional material-compliance declarations or certifications were provided, so do not assume them. Check the breaker markings or applicable documentation when you need to confirm a particular listing or compliance requirement.

Where It Works Best

• The NDC312T36W is intended for compatible electrical equipment that requires a 1200A, 3-pole Type NDC N-Frame breaker. It can be particularly useful for maintenance and replacement work where keeping the existing breaker configuration is important.
• Before using it as a replacement, compare more than the catalog number. Check the frame, amperage, number of poles, system voltage, A.I.C. rating, dimensions, trip functions, rating plug requirements, and terminal arrangement against the existing equipment. That helps determine whether the breaker is the correct form, fit, and functional match.