Square D FA24040AC Molded Case Circuit Breaker

Square D FA24040AC is a two‑pole molded‑case circuit breaker from the FA I‑Line family, rated for 40 A on 480 V AC (and 250 V DC) circuits. It accepts aluminum or copper conductors from 14 AWG through 1/0 AWG, with line‑side I‑Line terminations and load‑side lugs for straightforward wiring. This thermal‑magnetic MCCB provides an 80% continuous‑load rating and an interrupting capacity of 25 kA at 240 V and 18 kA at 480 V, making it suitable for protecting feeders and branch circuits in 480 V distribution panels. The FA24040AC is a factory‑assembled, 2‑pole device designed for use in Square D I‑Line installations, delivering reliable short‑circuit protection in rugged electrical environments. It is intended for 480‑V systems and complements other FA‑Series breakers and Square D distribution equipment to promote consistent protection and coordination across the power system.