KT3100T - 100Amp Trip Unit

KT3100T - 100Amp Trip Unit

If KT3100T is the part number you're trying to match, a few details will quickly tell you whether you're looking at the right trip unit. It's rated at 100 amps, uses a three-pole configuration, and is identified as a T266 trip unit for Series C J-K frame applications. The KT3100T is an accessory trip unit—not a complete molded case circuit breaker—so that distinction matters when you're sourcing parts for equipment already in service. When those details match the application requirements, the KT3100T may be a suitable form, fit, and functional replacement for compatible equipment.

Key Features and Benefits

• 100-amp rating: Rated for applications calling for a 100A trip unit.
• Three-pole design: Intended for compatible three-pole circuit breaker configurations.
• T266 trip type: A key identifier to check against the trip unit being replaced.
• J-K frame size: Specified for the J-K frame application.
• Series C: Designed for the specified Series C molded case circuit breaker application.
• Trip unit accessory: KT3100T is a circuit breaker trip unit, not a complete circuit breaker assembly.
  

Technical Specifications

• Catalog Number: KT3100T
  
• Product Type: Molded Case Circuit Breaker Accessory
  
• Component: Trip Unit
  
• Trip Type: T266
  
• Amperage Rating: 100A
  
• Poles: 3
  
• Frame Size: J-K
  
• Series: Series C
  
• Length/Depth: 6.9 in.
  
• Width: 5.3 in.
  
• Height: 4.2 in.
  
• Weight: 1.8 lb
  
• UPC: 786679266007
  
• Certification: UL Listed
  

Material Compliance and Certifications

The KT3100T is UL Listed, according to the supplied product specifications. For compliance information, the manufacturer's documentation states "Contact Manufacturer."

Where It Works Best

The KT3100T suits existing and legacy Series C molded case circuit breakers and applications that call for a 100A, three-pole T266 trip unit with a J-K frame size. Because this is a trip unit rather than a complete circuit breaker, consider the surrounding breaker assembly and application requirements in your selection process.

When replacing an existing unit, put the specifications side by side: KT3100T catalog number, T266 trip type, 100A rating, three poles, J-K frame size, Series C designation, and physical dimensions. Don't assume compatibility based on amperage alone.