Square D FCJ24100G Molded Case Circuit Breaker
- 100A
- 2 Pole
- Bolt-On
Quantity
Square D FCJ24100G - 100A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for harsh environments, the FCJ24100G delivers marine-rated thermal-magnetic protection. This 2-pole, 100A unit provides specialized defense for commercial, industrial, and maritime applications. It mounts into Square D switchboards and motor control centers. For modern replacements, it crosses to the HJL26100 base frame, which requires a separate shunt trip for ground fault functionality. Rated 65kAIC at 480VAC, it features extra-high interrupting capacity and non-interchangeable trip.Specifications
| Brand | Square D |
|---|---|
| Part Number | FCJ24100G |
| Series | FCJ |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Switchboards, Motor Control Centers, Marine Equipment |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Line and Load Lugs Included, Ground Fault Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CSA, UL, UL Marine |
| Temp Rating | 40C |
| Construction Features | Extra High Interrupting Capacity, Marine Rated, Non-Interchangeable Trip, HACR Rated |
Product FAQs
6 answersWhat types of enclosures and systems is the FCJ24100G designed for?
This legacy F-Frame breaker is engineered for installation in Square D switchboards, motor control centers, and marine equipment requiring a feed-thru, bolt-on configuration.
Can the FCJ24100G be installed in a standard I-Line panelboard?
No, this breaker features a feed-thru, bolt-on mounting style. It lacks the plug-on jaw connections required for I-Line busbars and is intended for switchboards or motor control centers that support feed-thru configurations.
What are the wire gauge limits for the FCJ24100G lugs?
The standard lugs accommodate conductors ranging from 14 AWG to 1/0 AWG. They are dual-rated for use with either copper or aluminum wiring.
How does the interrupting rating of the FCJ24100G scale with system voltage?
The breaker provides a maximum interrupting capacity of 100kAIC on 240VAC systems. When applied to 480VAC systems, the interrupting capacity is rated at 65kAIC.
What specific overcurrent protection functions does the FCJ24100G provide?
It features a fixed thermal-magnetic trip unit equipped with Long-Time and Instantaneous (LI) functions. The thermal element responds to sustained overloads, while the magnetic element trips immediately during short-circuit faults.
Is the Square D F-Frame series still the current standard for new installations?
No, the F-Frame is a legacy molded case circuit breaker family. While the FCJ24100G is still sourced for maintaining existing switchboards and motor control centers, new Square D installations typically utilize the PowerPact series.
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