NDC312T33W - 1200 Amp Circuit Breaker

NDC312T33W - 1200 Amp Circuit Breaker

Need an NDC312T33W for an existing electrical system? This 1200-amp, 3-pole N-frame molded case circuit breaker is intended for equipment that requires the original Type NDC configuration and corresponding electrical ratings. It's a thermal-magnetic electronic breaker with non-interchangeable trip units, plus adjustable short-time pickup with an I²t short-delay ramp. Interrupting capacity varies by system voltage: 65kA at 600VAC, 100kA at 480VAC, and 200kA at 240VAC. The breaker is also HACR rated. At 16 inches high, 8.25 inches wide, and 5.5 inches deep, its dimensions are another key factor when matching a breaker to existing equipment. This is especially useful for maintenance and replacement work where the goal isn't to change the original equipment configuration—you need the correct breaker for the application. The catalog number does not include a rating plug or lug terminals, so consider those items separately when checking the complete installation. Straightforward and built to last, the NDC312T33W provides the form, fit, and function compatible N-frame systems require.

Key Features and Benefits

• 1200-amp, 3-pole design for compatible three-phase applications.
• Type NDC, N-frame configuration for equipment designed around this breaker style.
• Interrupting ratings of 65kA at 600VAC, 100kA at 480VAC, and 200kA at 240VAC.
• Thermal-magnetic electronic circuit breaker with non-interchangeable trip units.
• Adjustable short-time pickup with I²t short-delay ramp.
• HACR-rated for applications where this rating is required.
• A practical option for maintaining the original form, fit, and function of compatible legacy electrical equipment.
• Built to last when installed and used within its specified application.
  

Technical Specifications

• Part Number: NDC312T33W
  
• Type: NDC
  
• Frame: N-Frame
  
• Poles: 3
  
• Amperage: 1200 A
  
• 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.
  
• Breaker Construction: Molded Case
  
• Protection Type: Thermal Magnetic / Electronic
  
• Trip Units: Non-Interchangeable
  
• Short-Time Function: Adjustable Short-Time Pickup with I²t Short-Delay Ramp
  
• HACR Rated: Yes
  
• Rating Plug: Not included in catalog number
  
• Lug Terminals: Not included in catalog number
  

Material Compliance and Certifications

• The information available for the NDC312T33W identifies it as HACR rated. No other material-compliance certifications were included in the supplied specifications. Therefore, do not assume additional certifications or compliance standards without supporting product documentation.
• When matching this breaker to existing equipment, check the breaker nameplate, system documentation, and part number. Also confirm plug and terminal requirements for the specific installation.
  

Where It Works Best

• The NDC312T33W is best suited for existing commercial and industrial electrical equipment designed for this N-frame breaker configuration. It can also fit HVAC-related applications that require an HACR-rated breaker and match the remaining specifications.
• For replacement work, amperage is only part of the picture. Check the NDC312T33W part number, three-pole configuration, physical dimensions, voltage, A.I.C. rating, trip characteristics, rating plug requirements, and terminal arrangement against the equipment you're servicing. That extra check helps ensure you're getting the form, fit, and electrical function the original system calls for.