Square D FC24050AB Molded Case Circuit Breaker
- 50A
- 2 Pole
- I-Line
Quantity
Square D FC24050AB - 50A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
A drop-in replacement for older electrical systems, the Square D FC24050AB is a legacy 2-pole molded case circuit breaker. It provides 50 amps of continuous current capacity and thermal-magnetic trip protection for industrial environments. Designed for seamless integration, it fits into Square D I-Line panelboards and features a factory-configured A-B phase connection. Delivering an extra-high interrupting rating of 65kA at 480VAC, this F-Frame model is superseded by the HJA260501.Specifications
| Brand | Square D |
|---|---|
| Series | FC |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG (Cu) / 12 AWG (Al) |
| 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, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Phase Connection A-B (Factory Configured) |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Extra High Interrupting Capacity, Phase Connection AB |
Product FAQs
6 answersWhat does the AB suffix in the FC24050AB catalog number indicate?
The AB suffix designates the specific phase connection. It means the breaker's plug-on jaws are factory-configured to connect to the A and B phases on a Square D I-Line panelboard busbar.
What is the modern replacement for the legacy FC24050AB circuit breaker?
The FC-frame is a legacy product. For modern upgrades, Schneider Electric replaced the F-frame series with the PowerPact H-frame molded case circuit breakers, which offer the same I-Line compatibility and equivalent interrupting ratings.
Does the FC24050AB require bolt-on hardware for installation?
No. As an I-Line style breaker, it features a plug-on stab connection that mounts directly onto the panelboard busbar. This design eliminates the need for bolt-on hardware and speeds up installation.
Is the FC24050AB suitable for DC power systems?
Yes. While primarily used in 480V AC systems, this thermal-magnetic breaker is also rated for 250V DC applications, providing a 10kAIC interrupting capacity for direct current loads.
Can I install this breaker in a standard Square D NQ or NF panelboard?
No, the FC24050AB is specifically designed for Square D I-Line panelboards and switchboards. It uses a unique plug-on stab connection that is not compatible with NQ or NF lighting panels.
Can the trip settings on the FC24050AB be adjusted in the field?
No, this breaker features a fixed thermal-magnetic trip unit. Both the long-time overload and instantaneous short circuit trip functions are factory-set and cannot be adjusted.
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.
Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
- AMAlan M.ReviewingSquare D FC34050 - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/25/21Breaker Order
All units were as described and sent quickly.
- JLJon L.ReviewingSquare D FC34030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/10/20SQ D Breaker
Needed an older breaker for a last minute job. Super Breakers had it in stock and it was in my hands in 2 days. Saved the day.