Schneider Electric FA36090 I-Line Circuit Breaker

Schneider Electric FA36090 is a 90 A, 3‑pole I‑Line molded‑case circuit breaker designed for 600 V AC distribution and compatible with FA/I‑Line panelboards. It uses line‑side I‑Line connections and load‑side lugs with ABC phase configuration for three‑phase systems, and accepts 14–1/0 AWG aluminum or copper conductors on the load side. The device is rated for interrupting capacities of 25 kA at 240 V, 18 kA at 480 V, and 14 kA at 600 V, reflecting typical performance for industrial power distribution. As a thermal‑magnetic MCCB, it provides magnetic tripping for short‑circuit faults and thermal protection for overloads, making it suitable for feeders and branch circuits in commercial and industrial environments where a 90 A breaker in a 3‑phase, 600 V class is required. The FA family from Square D / Schneider Electric is designed for plug‑in mounting in I‑Line panelboards, offering compact protection with standardized terminals and documented safety ratings that align with Schneider Electric cataloging.