Square D FGA34020 I-Line 3-Phase Circuit Breaker

Square D FGA34020 I-Line 3-Phase Circuit Breaker is a 20-amp, three-pole molded‑case breaker built for 480Y/277V I‑Line panelboard installations, delivering reliable overcurrent protection for commercial and light industrial circuits. This device employs a thermal‑magnetic trip mechanism, is designed for I‑Line style plug‑in mounting, and is listed for use with Square D I‑Line panelboards, ensuring a compatible fit within standard Square D distribution setups. As part of the FA/I‑Line family, it supports three‑phase circuits in 480V environments and is commonly employed to protect feeders, branch circuits, and motor control circuits in commercial buildings where fast, predictable tripping and easy field replacement are valued. The balance of its construction—molded‑case design and Square D branding—facilitates straightforward installation and interchangeability with other I‑Line breakers on similarly configured panels.