TEYD3125B - 125Amp Circuit Breaker

TEYD3125B - 125 Amp Circuit Breaker

The TEYD3125B is a 3-pole, 125-amp 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 480Y/277V Class applications, this breaker features a non-interchangeable trip unit, helping you maintain a consistent protection setting throughout its service life. Its bolt-on mounting design delivers a secure connection that helps you minimize movement and supports reliable electrical performance in panelboards where dependable circuit protection is essential. Whether you used for protecting feeders, branch circuits, or connected equipment, the TEYD3125B offers the performance and durability professionals expect in demanding environments. With interrupting ratings of 25kA at 480VAC and 65kA at 240VAC, it is well-suited for installations requiring strong fault-current protection while helping you keep electrical systems operating safely and efficiently. The combination of thermal and magnetic trip protection allows the breaker to respond to both sustained overloads and instantaneous short circuits, making it a dependable choice for a wide range of power distribution applications.

Key Features and Benefits

• 125 Amp Continuous Current Rating: 125 Amp continuous current rating for medium- to high-capacity electrical loads.
• Three-Pole Configuration: Three-pole configuration provides protection for three-phase electrical systems.
• Thermal Magnetic Trip Mechanism: Thermal magnetic trip mechanism responds to both overload conditions and short circuits.
• Bolt-On Mounting: Bolt-on mounting helps provide a secure installation with reliable electrical connections.
• Non-Interchangeable Trip Unit: Non-interchangeable trip unit maintains a fixed protection setting for consistent operation.
• 480Y/277V Class Design: 480Y/277V Class design supports a variety of commercial and industrial power distribution systems.
• Interrupting Capacity: Interrupting capacity of 25kA at 480VAC and 65kA at 240VAC helps protect equipment during high fault-current events.
• Compact Footprint: Compact footprint makes it suitable for compatible panelboard installations where space is limited.
  

Technical Specifications

• Part Number: TEYD3125B
  
• Type: TEYD
  
• Circuit Breaker Type: Bolt-On Thermal Magnetic Circuit Breaker
  
• Trip Unit: Non-Interchangeable
  
• Poles: 3
  
• Amperage: 125A
  
• Voltage Class: 480Y/277V Class
  
• Interrupting Rating: 25kA @ 480VAC; 65kA @ 240VAC
  
• Dimensions:
  • Height: 5.25 in.
  • Width: 3.00 in.
  • Depth: 3.06 in.

Material Compliance and Certifications

• Industry Performance Requirements: The TEYD3125B is manufactured for use in commercial and industrial electrical distribution systems and is designed to meet applicable industry performance requirements for molded case circuit breakers.
• Installation Guidance: Always verify compatibility with your specific electrical equipment, local electrical codes, and project specifications before installation. Installation and maintenance should be performed by qualified electrical professionals following applicable safety standards.
  

Where It Works Best

• The TEYD3125B is an excellent choice for a variety of power distribution applications, including commercial buildings and office facilities, industrial manufacturing plants, distribution and branch circuit protection, panelboards serving three-phase electrical systems, equipment protection for motors, machinery, and HVAC systems, and institutional, retail, and light industrial electrical installations. Its combination of a 125A rating, thermal magnetic protection, bolt-on installation, and high interrupting capacity makes the TEYD3125B a dependable solution for protecting electrical systems where consistent performance and reliable circuit protection are priorities.