TEYF3045B - 45Amp Circuit Breaker

TEYF3045B - 45 Amp Circuit Breaker

The TEYF3045B is a 45-amp, 3-pole bolt-on thermal-magnetic circuit breaker designed to provide dependable overcurrent and short-circuit protection for your commercial and industrial electrical distribution systems. Built for use in 480Y/277V class applications, this breaker features a non-interchangeable trip unit, helping you maintain a fixed protection setting throughout its service life. Its bolt-on mounting design provides a secure electrical connection that helps you reduce vibration-induced movement, making it well-suited for panelboards and distribution equipment where consistent performance and long-term reliability are essential. With interrupting ratings of 18kA at 480VAC and 65kA at 240VAC, the TEYF3045B is engineered to help safeguard connected equipment while minimizing the risk of damage during fault conditions. Whether you're replacing an existing breaker or maintaining a commercial electrical system, this breaker offers the dependable circuit protection professionals expect for demanding power distribution environments.

Key Features and Benefits

• 45 Amp Continuous Current Rating: 45 Amp continuous current rating for reliable branch circuit protection.
• 3-Pole Configuration: 3-pole configuration designed for three-phase electrical systems.
• Bolt-On Mounting: Bolt-on mounting provides a secure installation and dependable electrical connection.
• Thermal-Magnetic Trip Mechanism: The thermal-magnetic trip mechanism provides protection against both overloads and short circuits.
• Non-Interchangeable Trip Unit: Non-interchangeable trip unit maintains a fixed trip setting for consistent circuit protection.
• 480Y/277V Class Design: 480Y/277V class design supports a wide range of commercial and industrial applications.
• High Interrupting Capacity: High interrupting capacity rated at 18kA @ 480VAC and 65kA @ 240VAC for enhanced fault protection.
  

Technical Specifications

• Part Number: TEYF3045B
  
• Type: TEYF
  
• Circuit Breaker Style: Bolt-On Thermal Magnetic
  
• Trip Unit: Non-Interchangeable
  
• Poles: 3
  
• Current Rating: 45 Amps
  
• Voltage Class: 480Y/277V
  
• Interrupting Rating:
  • 18kA @ 480VAC
  • 65kA @ 240VAC
• Dimensions:
  • Height: 5.25 in.
  • Width: 3.00 in.
  • Depth: 3.06 in.

Material Compliance and Certifications

• Industry Requirements: The TEYF3045B is manufactured for use in electrical power distribution systems and is designed to meet applicable industry performance requirements for its product class.
• Installation Guidance: It should be installed and serviced by qualified personnel in accordance with the National Electrical Code (NEC), local electrical codes, and the equipment manufacturer's installation guidelines. Always verify compatibility with your specific panelboard and electrical system before installation.
  

Where It Works Best

• The TEYF3045B is an excellent choice for commercial buildings, industrial facilities, office complexes, schools, healthcare facilities, retail spaces, and institutional applications that utilize 480Y/277V three-phase electrical distribution systems. Its combination of a bolt-on design, thermal magnetic protection, and strong interrupting capacity makes it well-suited for protecting lighting circuits, HVAC equipment, motor loads, distribution panels, and other critical branch circuits where dependable overcurrent protection is essential.