Square D FI26100AC Molded Case Circuit Breaker
- 100A
- 2 Pole
- I-Line
Quantity
Square D FI26100AC - 100A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of the legacy F-Frame series, the Square D FI26100AC is a 100A, 2-pole current-limiting molded case circuit breaker. Built for commercial and industrial power distribution, it installs into Square D I-Line panelboards and switchboards using a factory-configured AC phase connection. This thermal-magnetic breaker delivers an exceptional 200kAIC interrupting rating at 480VAC, protecting downstream equipment from high fault currents. It is replaced by the PowerPact HRA261002.Specifications
| Brand | Square D |
|---|---|
| Part Number | FI26100AC |
| Series | FI |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480Y/277VAC, 200kA @ 480VAC, 100kA @ 600Y/347VAC, 100kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| 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 | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | AC Phase Connection (Factory Configured) |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489, W-C-375B/GEN |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
| Special Features | Current Limiting |
Product FAQs
8 answersWhat panels are compatible with the FI26100AC circuit breaker?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It features an I-Line style plug-in connection that mounts directly to the panel bus stack.
What does the current-limiting designation mean for the FI26100AC?
As an I-Limiter current-limiting breaker, it is engineered to clear short-circuit faults extremely fast. This reduces the peak let-through current and energy, providing enhanced protection for downstream electrical equipment.
What wire sizes are accepted by the lugs on the FI26100AC?
The factory lugs accept 14 AWG to 1/0 AWG copper or aluminum conductors. Ensure connections are torqued to the specifications listed on the breaker faceplate.
Is the Square D FI26100AC still in active production?
The FI26100AC is part of the legacy F-Frame series, which has been phased out by Schneider Electric. The modern replacement for this footprint is the PowerPact H-Frame I-Line circuit breaker series.
How does the I-Line mounting system work for this breaker?
The breaker uses a plug-on jaw connection that engages directly with the I-Line bus stack on the line side. The breaker body is then secured to the panel interior using a mounting bracket and retaining screws.
Can the FI26100AC be used in DC applications?
Yes, this breaker is rated for up to 250VDC with an interrupting capacity of 10kA, in addition to its standard AC voltage ratings.
What are the trip functions of the FI26100AC?
It features a thermal magnetic trip unit with fixed thermal and fixed magnetic settings. This provides standard Long-Time and Instantaneous (LI) overcurrent and short-circuit protection.
Does the FI26100AC require a specific torque setting during installation?
Yes, the load side lugs must be tightened to the exact torque specifications printed on the breaker faceplate to prevent arcing, overheating, and potential electrical fires.
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