FA24100AC **Old Style** - 100 Amp Circuit Breaker

FA24100AC **Old Style** - 100 Amp Circuit Breaker

When an existing electrical system needs a replacement breaker, finding the correct match matters. The FA24100AC Old Style is a 100 Amp, 2-pole thermal magnetic molded case circuit breaker designed for use in compatible I-Line plug-in panelboards. Built on the FA frame, it provides the same form, fit, and function as many existing installations, making it well-suited for maintenance, repair, and replacement projects where equipment compatibility is the priority.

The thermal-magnetic trip mechanism responds to both sustained overloads and short circuits, helping to protect connected equipment and branch circuits during normal operation. With an interrupting capacity of 18 kA at 240 VAC and 14 kA at 480 VAC, the breaker is intended for applications within those ratings. It is configured for 60Hz systems, features an A-C phase arrangement, carries an HACR Type rating, and is designed for operation in ambient temperatures up to 40°C. Like many molded-case circuit breakers designed for commercial and industrial service, the FA24100AC Old Style is built to last when properly installed and maintained.

Key Features and Benefits

• 100 Amp current rating
• Two-pole configuration
• FA frame design
• Old Style construction
• I-Line plug-in mounting
• Thermal magnetic trip unit protects against overloads and short circuits
• HACR Type rated
• Designed for 60Hz electrical systems
• A-C phase configuration
• Form, fit, and functional replacement for compatible legacy equipment
• Built to last when properly installed and maintained
  

Technical Specifications

• Part Number: FA24100AC Old Style
  
• Product Type: Thermal Magnetic Molded Case Circuit Breaker
  
• Frame Type: FA
  
• Amperage: 100 Amps
  
• Voltage Rating: 240VAC / 480VAC
  
• Poles: 2
  
• Interrupting Rating: 18kA @ 240VAC; 14kA @ 480VAC
  
• Frequency: 60Hz
  
• Mounting Style: I-Line Plug-In
  
• Phase Configuration: A-C
  
• 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 FA24100AC Old Style is a molded case circuit breaker intended for use in compatible I-Line electrical distribution equipment. Always verify the breaker's voltage, interrupting rating, frame type, and mounting style before installation. Installation should be completed by qualified personnel in accordance with the National Electrical Code (NEC), applicable local regulations, and the equipment manufacturer's instructions.

Where It Works Best

• Compatible I-Line panelboards
• Commercial buildings
• Industrial facilities
• HVAC equipment requiring an HACR-rated circuit breaker
• Electrical maintenance and repair projects
• Existing installations requiring a form, fit, and functional replacement for compatible FA frame breakers