Skip to content
  • Product Image of FA24100AC **Old Style** - 100 Amp Circuit Breaker #1
** Picture is for identification purposes only and may not represent the actual amperage of the product listed **
scroll for more

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

  • 100 Amp
  • 14k @ 480VAC; 18k @ 240VAC
  • 2 Pole
Circuit BreakersSKU: FA24100AC **Old Style** [R]

Purchase Options: Refurbished

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

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

Use of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer. CIRCUIT BREAKER SUPERSTORE® is an independent reseller and is not an authorized distributor, affiliate, or representative of any manufacturer. Manufacturer warranties do not apply unless expressly stated. All trademarks and registered trademarks are the property of their respective owners.

Square D® is a registered trademark of Schneider Electric. Products sold are surplus, used, or refurbished and are NOT supplied by Schneider Electric or its affiliates.

Specifications

  • Width:3.0
  • Height:8.75
  • Depth:4.38
  • Poles:2
  • Amperes:100
  • A.I.C. Rating & Volts:14k @ 480VAC; 18k @ 240VAC
  • Type:FA
  • Approx Dimensions:3.00"W x 8.75"L x 4.38"D
  • Additional Notes:60Hz, 40°C, HACR Type, I-Line Style, Plug-In, "A-C" Phase, Thermal Magnetic, Molded Case Circuit Breaker

Returns are easy

You may return unused items within 30 days of delivery for a full refund.

FREE ground shipping on breaker orders over $100 and all other items with orders over $500.

Shipping charges are Prepaid and Allowed on UPS Ground orders for all other products on orders over $500.00, again only when shipping within the lower 48 continental United States, provided the product(s) can safely ship UPS Ground.

If the product cannot safely ship via UPS Ground, or is too heavy to ship UPS Ground, then the product will be shipped via freightliner at buyer's expense.

CIRCUIT BREAKER SUPERSTORE® offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

Same Day Shipping

We strive to ship out your items within one business day.

In rare circumstances, CIRCUIT BREAKER SUPERSTORE® may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

CIRCUIT BREAKER SUPERSTORE® provides a limited 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer).

Similar Products

Why Us?

Free Shipping

Free shipping on breaker orders over $100*

100k+ Happy Customers

4.9 Google rating

Secure Shopping

Feel protected with every transaction