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Square D FCB34100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Square D
FCB34100
Molded Case Circuit Breaker
Brand
Square D
SKU
FCB34100
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Square D FCB34100 - 100A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for heavy-duty applications, the FCB34100 delivers reliable thermal-magnetic protection for commercial and industrial environments. This 3-pole, 100A breaker ensures optimal safety for demanding electrical systems. The unit installs into Square D I-Line panelboards and switchboards using a standard bolt-on configuration. Note that this specific model has been replaced by the HJA36100 for newer installations. It features a 65kAIC rating at 480VAC and includes fixed thermal trip.Specifications
| Brand | Square D |
|---|---|
| Part Number | FCB34100-R |
| Series | FCB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards and 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
7 answersCan I install the FCB34100 in a standard QO or Homeline load center?
No. This is an I-Line style bolt-on breaker designed specifically for Square D I-Line panelboards and switchboards. It will not fit in standard residential load centers.
What is the direct replacement for the FCB34100?
For newer installations, Square D has replaced this legacy F-frame breaker with the PowerPact H-frame HJA36100.
Does this breaker include adjustable trip settings?
Yes, the thermal-magnetic trip unit features an adjustable magnetic trip for instantaneous protection, while the thermal long-time protection remains fixed.
What does the LI trip function code mean on this breaker?
The LI designation indicates that the breaker provides Long-Time (L) overload protection and Instantaneous (I) short-circuit protection.
What wire material is compatible with the FCB34100 lugs?
The factory lugs are rated for both copper (Cu) and aluminum (Al) conductors sized between 14 AWG and 1/0 AWG.
Can the FCB34100 be used on a 240VAC system?
Yes. Although it has a maximum voltage rating of 480VAC, it is fully compatible with 240VAC systems.
Does the FCB34100 require a separate mounting bracket for installation?
No. As an I-Line breaker, it features a self-contained bolt-on connection that secures directly to the panelboard bus assembly, eliminating the need for separate mounting hardware.
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