Square D FCP34090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Quantity
Square D FCP34090 - 90A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for demanding environments, the FCP34090 is a 90A, 3-pole molded case circuit breaker from Square D. It provides essential long-time and instantaneous trip functions for commercial and industrial facilities. This unit mounts into Square D panelboards and motor control centers using a secure bolt-on connection. As a legacy component, it is replaced by the modern HJL36090 breaker. Featuring an extra-high interrupting capacity of 65kA at 480VAC, it ensures superior fault protection.Specifications
| Brand | Square D |
|---|---|
| Part Number | FCP34090 |
| Series | FCP |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC |
| Frame Type | FCL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Panelboards, Switchboards, Motor Control Centers |
| 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, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Line and Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB-1, W-C-375B/GEN |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Extra High Interrupting Capacity, Non-Interchangeable Trip |
Product FAQs
5 answersWhat is the modern replacement for the legacy FCP34090 circuit breaker?
The FCP34090 is part of Square D's legacy F-Frame series. For modern system upgrades, it crosses over to the PowerPact H-Frame series, specifically the HJL36090. When upgrading, verify that your panel or switchboard is approved to accept H-Frame breakers.
Can I install this F-Frame breaker in any Square D panel?
No. The FCP34090 is a bolt-on, feed-thru breaker designed specifically for legacy Square D panelboards, switchboards, and motor control centers labeled to accept F-Frame or FCP types. It is not compatible with standard QO, Homeline, or I-Line panels. Always check the equipment nameplate for approved breaker types.
What wire sizes and materials are supported by the FCP34090 terminals?
The factory-installed lugs on this breaker accommodate both copper and aluminum conductors. The accepted wire gauge range is 14 AWG to 1/0 AWG. Ensure proper torque specifications are followed during installation to maintain a secure electrical connection.
How does the fixed thermal-magnetic trip unit operate on the FCP34090?
This breaker features an LI trip function, meaning it provides fixed Long-Time protection for sustained overloads and fixed Instantaneous protection for sudden short circuits. Because the thermal and magnetic settings are fixed, they cannot be field-adjusted by the installer.
Is it safe to replace a standard breaker with the high-interrupting FCP34090?
Yes, installing a breaker with a higher interrupting rating, such as the 65kA at 480V rating of the FCP34090, is safe and often required in commercial environments with high available fault current. However, you must ensure the breaker frame and physical mounting style match your panel requirements.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.