KDC3300 - 300Amp Circuit Breaker

KDC3300 - 300Amp Circuit Breaker

If your equipment documentation calls for a KDC3300, there are several specifications worth putting side by side with the breaker already in service. The KDC3300 is a 300-amp, three-pole Series C Type KDC molded case circuit breaker built on a K frame and supplied as a complete breaker. It uses the specified T186 trip type, carries voltage ratings of 600 VAC and 250 VDC, and operates at 50–60Hz. When the KDC3300 catalog number, 300A rating, three-pole configuration, K frame, T186 trip type, dimensions, terminals, voltage ratings, frequency, and interrupting capacity correspond with the application, it can provide the required form, fit, and function.

Key Features and Benefits

• 300A, three-pole configuration: Provides clear amperage and pole specifications to match the breaker with compatible electrical equipment.
• Series C Type KDC: Helps technicians identify the required breaker family and configuration during replacement and maintenance work.
• Complete breaker: The KDC3300 is specified as a complete molded-case circuit breaker, not a frame-only component.
• T186 trip type: An important part of the breaker specification that should be confirmed when determining compatibility.
• 600VAC and 250VDC ratings: Establishes the stated AC and DC voltage ratings for the breaker.
• Aluminum line and load terminals: Both terminal location and material are identified for a more complete application check.
• 50–60Hz operation: Clearly states the breaker's specified frequency range.
  

Technical Specifications

• Catalog Number: KDC3300
  
• Product Type: Molded Case Circuit Breaker
  
• Series: Series C
  
• Circuit Breaker Type: KDC
  
• Frame: K
  
• Frame Type: Complete Breaker
  
• Amperage Rating: 300A
  
• Number of Poles: 3
  
• Voltage Rating: 600VAC, 250VDC
  
• Trip Type: T186
  
• Interrupt Rating at 480VAC: 100 kAIC
  
• Interrupt Rating at 240VAC: 200 kAIC
  
• Frequency Rating: 50–60Hz
  
• Terminals: Line and Load
  
• Terminal Material: Aluminum
  
• Product Width: 5.5 in.
  
• Product Height: 5.5 in.
  
• Product Length/Depth: 4.1 in.
  
• Product Weight: 11.5 lbs.
  
• UPC: 786679341681
  
• Certification: UL Listed
  

Material Compliance and Certifications

The KDC3300 is UL Listed, according to the supplied manufacturer specifications. Its line and load terminals are identified as aluminum, another documented material characteristic that can be verified during application requirements confirmation.

Where It Works Best

The KDC3300 300 amp circuit breaker is intended for compatible existing and legacy electrical equipment that requires its particular Series C, Type KDC, K-frame configuration. It's especially important in replacement applications to identify the breaker by its complete specification rather than by amperage or appearance alone.

Start by confirming the KDC3300 catalog number, 300A rating, and three-pole configuration. From there, check the K frame and T186 trip type against the existing breaker and equipment documentation. These identification details can help distinguish the required configuration from breakers that may look similar.