KT3400T - 400Amp Trip Unit

KT3400T - 400Amp Trip Unit

The KT3400T is a 400-amp, three-pole T266 trip unit made for compatible Series C K-frame molded case circuit breaker applications. If you're replacing a trip unit in equipment already in service, match the full set of specifications—not just the 400A rating. Check the T266 trip designation, K-frame size, three-pole configuration, Series C identification, and the KT3400T catalog number against the existing component. Size is worth checking, too.

Key Features and Benefits

• 400A rating for applications requiring a 400-amp trip unit.
• Three-pole design for compatible three-pole breaker assemblies.
• T266 trip type provides an important reference when matching an existing component.
• Designed around the specified K-frame application.
• Series C identification helps narrow down compatibility with existing equipment.
• Supplied as a trip unit accessory, rather than a complete molded case circuit breaker.
  

Technical Specifications

• Catalog Number: KT3400T
  
• Product Type: Molded Case Circuit Breaker Accessory
  
• Component: Trip Unit
  
• Trip Type: T266
  
• Amperage Rating: 400A
  
• Poles: 3
  
• Frame Size: K Frame
  
• Series: Series C
  
• Length/Depth: 6.9 in.
  
• Width: 4.2 in.
  
• Height: 5.4 in.
  
• Weight: 1.95 lb
  
• UPC: 786679266090
  
• Certification: UL Listed
  

Material Compliance and Certifications

The supplied product information identifies the KT3400T as UL Listed. For material compliance, the manufacturer information states "Contact Manufacturer."

Where It Works Best

The KT3400T makes the most sense when servicing existing or legacy Series C equipment that specifically requires a 400A, three-pole T266 trip unit for a K-frame application.

When checking a replacement, put the old component information next to the KT3400T specifications. Look for the KT3400T catalog number, T266 trip type, 400A rating, K frame, Series C designation, three-pole configuration, and physical dimensions. Those details give you a much better basis for determining compatibility than amperage alone.