FB3125L - 125Amp Circuit Breaker

FB3125L - 125Amp Circuit Breaker

When a circuit breaker reaches the end of its service life, finding the right replacement is about more than matching the amperage. The replacement needs to fit the existing equipment, meet the original electrical ratings, and perform the same protective function. The FB3125L is a 125 Amp, 3-pole FB thermal-magnetic circuit breaker designed as a form, fit, and functional replacement for compatible legacy electrical systems. It provides the electrical characteristics needed to help keep existing distribution equipment operating as intended without changing the original design.

Key Features and Benefits

• Form, fit, and functional replacement for compatible FB electrical systems
• 125 Amp, 3-pole thermal-magnetic circuit breaker
• Thermal trip helps protect circuits during sustained overload conditions
• Magnetic trip responds quickly during short-circuit events
• Non-interchangeable trip unit with factory-set protection characteristics
• Rated for operation in ambient temperatures up to 40°C
• Includes line and load-side terminals
• Built to last for continued service in compatible legacy electrical equipment

Technical Specifications

• Part Number: FB3125L
  
• Type: FB
  
• Circuit Breaker Type: Thermal-Magnetic
  
• Amperage: 125 Amps
  
• Poles: 3
  
• Interrupting Rating: 14kA @ 480VAC; 25kA @ 240VAC
  
• Trip Unit: Non-Interchangeable
  
• Ambient Rating: 40°C
  
• Terminals: Line and Load-Side Terminals Included
  
• Dimensions:
  • Height: 6.00"
  • Width: 4.13"
  • Depth: 3.38"
• Dimensions: 4.13"W × 6.00"H × 3.38"D
  
• Approximate Shipping Weight: 5.50 lbs.
  

Material Compliance and Certifications

No material compliance or certification information has been provided for the FB3125L. Before installation, verify that the circuit breaker is compatible with the equipment being serviced and that all electrical ratings meet the application requirements. Installation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC), applicable local electrical codes, and the original equipment manufacturer's recommendations.

Where It Works Best

The FB3125L is commonly used in commercial, industrial, and institutional facilities that continue to operate compatible FB electrical distribution equipment. It is a practical choice for protecting three-phase feeders, motor circuits, HVAC equipment, pumps, compressors, manufacturing equipment, and general power distribution systems where maintaining compatibility with existing electrical infrastructure is the primary objective.