FB3100 - 100Amp Circuit Breaker

FB3100 - 100Amp Circuit Breaker

When electrical systems need a replacement breaker, compatibility is just as important as electrical ratings. The FB3100 is a 100 Amp, 3-pole FB thermal-magnetic circuit breaker built as a form, fit, and functional replacement for compatible legacy electrical distribution equipment. Matching the original breaker's configuration helps simplify maintenance while keeping existing systems operating as intended. Whether you're replacing a breaker during scheduled service or responding to an unexpected outage, the FB3100 delivers the protection required without altering the original installation.

Protection comes from a combination of thermal and magnetic trip functions that respond to different fault conditions. The thermal element reacts to sustained overloads by opening the circuit before excessive heat can build up, while the magnetic element responds almost instantly to the high current associated with short circuits.

Key Features and Benefits

• Form, fit, and functional replacement for compatible FB electrical systems
• 100 Amp, 3-pole thermal-magnetic circuit breaker
• Thermal trip helps protect circuits from prolonged overload conditions
• Magnetic trip provides rapid response during short-circuit events
• Non-interchangeable trip unit with factory-established trip characteristics
• Interrupting ratings of 14kA at 480VAC and 25kA at 240VAC
• Rated for operation in ambient temperatures up to 40°C
• Includes load-side terminals

Technical Specifications

• Part Number: FB3100
  
• Type: FB
  
• Circuit Breaker Type: Thermal-Magnetic
  
• Amperage: 100 Amps
  
• Poles: 3
  
• Interrupting Rating: 14kA @ 480VAC; 25kA @ 240VAC
  
• Trip Unit: Non-Interchangeable
  
• Ambient Rating: 40°C
  
• 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 FB3100. Before installation, verify that the circuit breaker's electrical ratings, physical dimensions, mounting configuration, terminal arrangement, and application requirements match the equipment being serviced. Installation should be completed 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 FB3100 is intended for use in compatible FB panelboards and electrical distribution equipment installed in commercial buildings, manufacturing facilities, warehouses, institutional properties, and other industrial environments. It is commonly applied to protect three-phase branch circuits serving motors, HVAC equipment, pumps, compressors, lighting systems, and general power distribution where maintaining compatibility with existing legacy equipment is the primary objective.