TEYL3125B - 125Amp Circuit Breaker

TEYL3125B - 125 Amp Circuit Breaker

The TEYL3125B is a 125 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 480Y/277V Class applications, this breaker features a non-interchangeable trip unit, helping you maintain a fixed protection setting for consistent system performance. Its bolt-on mounting design creates a secure connection within compatible panelboards, making it a practical choice for facilities where reliable circuit protection and long-term electrical safety are essential. With interrupting ratings of 65kA at 480VAC and 100kA at 240VAC, the TEYL3125B is well suited for demanding electrical environments where higher available fault currents must be safely managed. Whether you use it in new installations, equipment upgrades, or maintenance projects, this thermal magnetic circuit breaker delivers the dependable protection needed to help you minimize downtime and safeguard valuable electrical equipment.

Key Features and Benefits

• 125 Amp Current Rating: Provides medium- to high-capacity branch circuit protection.
• 3-Pole Configuration: Designed for three-phase electrical systems.
• Bolt-On Mounting: Provides a secure and stable installation.
• Thermal Magnetic Protection: The thermal magnetic trip mechanism protects against overloads and short circuits.
• Non-Interchangeable Trip Unit: Helps maintain a fixed protection rating.
• 480Y/277V Class Design: Rated for 480Y/277V Class electrical distribution systems.
• High Interrupting Capacity: Rated at 65kA at 480VAC and 100kA at 240VAC.
• Commercial and Industrial Applications: Suitable for commercial, industrial, and institutional electrical applications.
• Compact Footprint: Allows installation where panel space is limited.

Technical Specifications

• Part Number: TEYL3125B
• Type: TEYL
• Circuit Breaker Style: Bolt-On Thermal Magnetic Circuit Breaker
• Trip Unit: Non-Interchangeable
• Poles: 3
• Current Rating: 125 Amps
• Voltage Class: 480Y/277V
• Interrupting Rating: 65kA @ 480VAC; 100kA @ 240VAC
• Dimensions:
  • Height: 5.25 in.
  • Width: 3.00 in.
  • Depth: 3.06 in.

Material Compliance and Certifications

• Installation Requirements: The TEYL3125B is manufactured for use in electrical distribution systems that require dependable overcurrent protection. It should be installed and maintained in accordance with applicable National Electrical Code (NEC) requirements, local electrical codes, and manufacturer recommendations.
• Compatibility: Always verify compatibility with your existing electrical equipment and application requirements before installation.

Where It Works Best

• The TEYL3125B is an excellent choice for protecting three-phase electrical circuits in a wide range of commercial and industrial settings. It is commonly used in office buildings, manufacturing facilities, healthcare campuses, educational institutions, retail properties, warehouses, and other facilities that require dependable branch circuit protection. Its high interrupting capacity also makes it suitable for installations where available fault current levels demand enhanced circuit protection.