TEF134040 - 40Amp Circuit Breaker

TEF134040 - 40Amp Circuit Breaker

Finding the right replacement breaker is about more than matching the amperage. The TEF134040 is a 3-pole, 40-amp molded case circuit breaker built for compatible Type TEF applications in commercial and industrial electrical systems. It uses a non-interchangeable thermal magnetic trip unit that helps protect circuits from overloads and short circuits, making it a dependable choice for keeping existing equipment operating as intended. With an 18kA interrupting rating at 480VAC, this breaker is designed for installations that require those exact electrical ratings. It also comes with load-side lugs, so it's ready for use in compatible equipment. Whether you're replacing a worn breaker during maintenance or servicing an older distribution system, this model offers the form, fit, and function needed to match the original installation. Like many industrial breakers built for demanding environments, it's designed to provide years of dependable service.

Key Features and Benefits

• 40 Amp Current Rating: 40 Amp current rating.
• Three-Pole Design: Three-pole design for three-phase electrical systems.
• Type TEF Molded Case Circuit Breaker: Type TEF molded case circuit breaker.
• Non-Interchangeable Thermal Magnetic Trip Unit: Non-interchangeable thermal magnetic trip unit.
• 18kA Interrupting Rating: 18kA interrupting rating at 480VAC.
• Includes Load-Side Lugs: Includes load-side lugs.
• Form, Fit, and Functional Replacement: Designed as a form, fit, and functional replacement for compatible equipment.
• Built to Last: Built to last in commercial and industrial applications.
  

Technical Specifications

• Part Number: TEF134040
  
• Type: TEF
  
• Product Type: Molded Case Industrial Circuit Breaker
  
• Poles: 3
  
• Amperage: 40A
  
• Trip Unit: Non-Interchangeable Thermal Magnetic
  
• Interrupting Rating: 18kA @ 480VAC
  
• Dimensions:
  • Height: 6.31 in.
  • Width: 4.13 in.
  • Depth: 3.38 in.
• Included: Load-Side Lugs
  

Material Compliance and Certifications

• Application: This circuit breaker is intended for use in compatible commercial and industrial electrical distribution systems. Always confirm that the electrical ratings, physical dimensions, and application requirements match your equipment before installation.
• Installation: Installation should be performed in accordance with applicable electrical codes and manufacturer requirements.
  

Where It Works Best

• The TEF134040 is commonly used in commercial facilities, manufacturing plants, warehouses, schools, and other industrial buildings with three-phase electrical distribution. It's well suited for protecting feeders, branch circuits, and equipment where a 40-amp, 3-pole Type TEF breaker with an 18kA interrupting rating at 480VAC is required. For facilities maintaining existing equipment, it provides the correct form, fit, and function without changing the original system design.