KDC3350 - 350Amp Circuit Breaker

KDC3350 - 350Amp Circuit Breaker

When your maintenance sheet calls for a KDC3350, there are several details to check before installing the breaker in the equipment. This is a 350-amp, three-pole Series C Type KDC molded case circuit breaker, supplied as a complete K-frame breaker with a T186 trip type. For electricians and maintenance teams working on existing or legacy equipment, that complete set of specifications is what matters. Properly selected, installed, and operated within its stated ratings, it's built to last in the equipment it was designed to serve.

Key Features and Benefits

• 350A, three-pole configuration: Clearly identifies the amperage and pole arrangement for applications requiring this setup.
• Series C Type KDC: Helps technicians confirm they're working with the correct breaker family rather than relying on amperage alone.
• Complete K-frame breaker: The KDC3350 is specified as a complete breaker, an important distinction when checking an existing installation.
• T186 trip type: Gives you another specific identifier to compare with the breaker being replaced and the equipment requirements.
• 600VAC and 250VDC ratings: Both AC and DC voltage ratings are clearly defined to match applications.
• Aluminum line and load terminals: Terminal position and material are specified, reducing some of the guesswork in the compatibility check.
• 50–60Hz operation: Provides another electrical characteristic to verify before installation.
  

Technical Specifications

• Catalog Number: KDC3350
  
• Product Type: Molded Case Circuit Breaker
  
• Series: Series C
  
• Circuit Breaker Type: KDC
  
• Frame: K
  
• Frame Type: Complete Breaker
  
• Amperage Rating: 350A
  
• Number of Poles: 3
  
• Voltage Rating: 600VAC, 250VDC
  
• Trip Type: T186
  
• Interrupt Rating at 480VAC: 100 kAIC
  
• Interrupt Rating at 240VAC: 200 kAIC
  
• Frequency: 50–60Hz
  
• Terminals: Line and Load
  
• Terminal Material: Aluminum
  
• Width: 5.5 in.
  
• Height: 5.5 in.
  
• Length/Depth: 4.1 in.
  
• Weight: 11.5 lbs.
  
• UPC: 786679026366
  
• Certification: UL Listed
  

Material Compliance and Certifications

The KDC3350 is UL Listed in accordance with the supplied manufacturer specifications. Its line and load terminals are specified as aluminum.

Where It Works Best

The KDC3350 makes sense for maintenance and replacement work on compatible existing or legacy electrical equipment that calls for a 350A, three-pole Series C Type KDC breaker with a K frame and T186 trip type.

There are a few things you'll want to compare before installation. Start with the catalog number and breaker type, then confirm the 350A rating, three poles, K frame, T186 trip type, and 5.5"W x 5.5"H x 4.1"D dimensions. Those details help determine whether the physical configuration matches the equipment.