Designed for reliable power distribution, the Square D FY14020C is a 1-pole, 20A molded case circuit breaker. It is engineered to handle commercial and industrial loads with consistent thermal-magnetic protection. This breaker installs into Square D I-Line panelboards and features a factory-configured Phase C connection. For system updates, it is replaced by the BDA140205. Rated at 14 kAIC at 277VAC, it is SWD rated for switching duty and carries a HACR certification for HVAC equipment.
Is the FY14020C still an active Square D catalog number?
No, the legacy FY F-frame series has been discontinued by Schneider Electric. For new installations or full panel retrofits, the PowerPacT B-frame series (specifically catalog number BDA140205) is the manufacturer recommended replacement for this 20A, 1-pole I-Line breaker.
Why does the catalog number end with the letter C?
For Square D 1-pole I-Line circuit breakers, the suffix letter indicates the specific phase connection. The C designates that this breaker is factory configured to connect only to the C-phase of the panelboard bus.
Can I install this I-Line circuit breaker in a standard Square D QO or NQ panel?
No. The FY14020C features an I-Line style plug-in connection designed exclusively for Square D I-Line panelboards and switchboards. It will not physically fit or connect to the bus of QO load centers or NQ panels.
Does this F-frame breaker support direct current (DC) applications?
Yes. In addition to its primary 277VAC rating, the FY14020C is rated for use in 125VDC systems, where it provides a 10kA interrupting capacity.
How does the FY14020C secure to the panelboard interior?
It utilizes the Square D I-Line plug-on connection design. The line side of the breaker plugs directly onto the bus stack, while a mounting foot on the back bolts the breaker to the panel mounting pan. The load side connects via standard mechanical lugs.
What are the acceptable wire sizes for the load-side lugs?
The mechanical lugs are rated for both copper and aluminum conductors. They accept 14 AWG to 4 AWG copper wire or 12 AWG to 4 AWG aluminum wire.
How does the thermal-magnetic trip unit on this breaker respond to electrical faults?
The FY14020C uses a fixed LI (Long-Time and Instantaneous) trip function. The thermal component slowly heats up to trip the breaker during prolonged overloads, while the magnetic component responds immediately to severe short circuits to protect your downstream equipment.
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Customers rate this product 4.8 out of 5 based on 6 reviews.