FA24100AB **Old Style** - 100 Amp Circuit Breaker

FA24100AB **Old Style** - 100 Amp Circuit Breaker

Keeping your existing electrical distribution system in service often comes down to finding the right replacement breaker. The FA24100AB Old Style is a 100 Amp, 2-pole thermal magnetic molded case circuit breaker built for use in compatible I-Line plug-in panelboards. It matches the original FA frame configuration, making it a practical choice when maintaining or repairing older commercial and industrial electrical systems without changing the existing equipment layout.

Key Features and Benefits

• 100 Amp current rating
• Two-pole molded case circuit breaker
• FA frame, Old Style configuration
• I-Line plug-in mounting
• Thermal magnetic trip protection for overloads and short circuits
• Interrupting capacity of 18kA at 240VAC and 14kA at 480VAC
• A-B phase configuration
• HACR Type rated
• Designed for 60Hz systems operating at 40°C ambient temperature
• Helps maintain the original form, fit, and function of compatible legacy equipment
  

Technical Specifications

• Part Number: FA24100AB Old Style
  
• Product Type: Thermal Magnetic Molded Case Circuit Breaker
  
• Frame: FA
  
• Amperage Rating: 100 Amps
  
• Voltage Rating: 240VAC / 480VAC
  
• Frequency: 60Hz
  
• Poles: 2
  
• Interrupt Rating: 18kA @ 240VAC; 14kA @ 480VAC
  
• Mounting Style: I-Line Plug-In
  
• Phase Configuration: A-B
  
• Trip Type: Thermal Magnetic
  
• HACR Rated: Yes
  
• Operating Ambient: 40°C
  
• Dimensions:
  • Width: 3.00 in.
  • Height: 8.75 in.
  • Depth: 4.38 in.
• Approximate Shipping Weight: 6.25 lbs.
  

Material Compliance and Certifications

The FA24100AB Old Style is a molded case circuit breaker intended for use in compatible I-Line electrical distribution equipment. It is designed for replacement applications where matching the original frame size, mounting method, electrical ratings, and phase configuration is important. Installation should always be completed by qualified personnel and in accordance with the National Electrical Code (NEC), the equipment manufacturer's instructions, and applicable local regulations.

Where It Works Best

• Existing I-Line panelboards
• Commercial buildings
• Industrial facilities
• HVAC and refrigeration equipment requiring an HACR-rated breaker
• Maintenance and repair of legacy electrical distribution systems
• Applications where preserving the original form, fit, and function is required