KT3300T - 300Amp Trip Unit

KT3300T - 300Amp Trip Unit

When you're replacing a trip unit in equipment already in service, small identifiers usually settle the fit question. The KT3300T is a 300-amp, three-pole T266 trip unit for compatible Series C J-K frame molded case circuit breaker applications. It is an accessory component—not a complete circuit breaker—so check the KT3300T catalog number, T266 trip type, 300A rating, J-K frame designation, and Series C identification against the existing unit and equipment documentation. Size is worth checking too. Properly selected, installed, and used within its specified application, it's built to last in the service it was designed for.

Key Features and Benefits

• 300A rating: Intended for applications that specify a 300-amp trip unit.
• Three-pole design: Suitable where the existing equipment calls for a three-pole configuration.
• T266 trip type: A key identifier to compare with the trip unit being replaced.
• J-K frame size: Specified for compatible J-K frame applications.
• Series C: Helps identify the equipment family this component is intended to work with.
• Trip unit accessory: The trip unit itself, not a complete molded case circuit breaker.
  

Technical Specifications

• Catalog Number: KT3300T
  
• Product Type: Molded Case Circuit Breaker Accessory
  
• Component: Trip Unit
  
• Trip Type: T266
  
• Amperage Rating: 300A
  
• Poles: 3
  
• Frame Size: J-K
  
• Series: Series C
  
• Length/Depth: 5.25 in.
  
• Width: 4.5 in.
  
• Height: 7 in.
  
• Weight: 1.82 lb
  
• UPC: 786679266076
  
• Certification: UL Listed
  

Material Compliance and Certifications

The supplied specifications identify the KT3300T as UL Listed. For compliance information, the product documentation states "Contact Manufacturer."

Where It Works Best

The KT3300T belongs in the conversation when you're servicing compatible Series C molded case circuit breaker equipment that calls for a 300A, three-pole T266 trip unit with a J-K frame designation.

A good replacement check is straightforward: put the old component specifications next to the KT3300T information and work through them. Confirm KT3300T, 300A, T266, three poles, J-K frame, Series C, and the physical dimensions. Don't determine compatibility from amperage alone.