Square D by Schneider Electric FA34020 Circuit Breaker

Square D by Schneider Electric FA34020 is a 3‑pole I‑Line molded‑case circuit breaker rated at 20 A for use in Square D I‑Line panelboards. It is an FA‑series MCCB designed for plug‑on installation with standard load‑end terminals, suitable for 480 VAC line‑to‑line operation (and up to 250 VDC) in three‑phase distribution. The device uses a thermal‑magnetic trip mechanism with a non‑interchangeable trip unit and provides an 18 kA short‑circuit interrupting rating at 480 VAC, making it appropriate for moderate to heavy distribution tasks in commercial or light industrial facilities. With a 40°C ambient rating, this FA34020 is built to endure typical equipment room conditions while delivering reliable overcurrent protection. Its FA frame and I‑Line interface support consistent coordination with other Square D protection devices across a panel, simplifying installation and troubleshooting in multi‑breaker layouts. Common applications include feeding transformers, motors, and other three‑phase equipment within panelboards that require robust, plug‑on protection from overloads and short circuits.