Square D FA36020 3 Pole Plug In Circuit Breaker

The Square D FA36020 is a 20‑amp, 3‑pole molded‑case circuit breaker designed for plug‑in installation in I‑Line panelboards. Part of Schneider Electric’s FA family, this 3‑pole unit provides three‑phase protection for circuits up to 600 V in commercial and light‑industrial electrical systems. It uses a thermal‑magnetic trip mechanism to deliver reliable overload and short‑circuit protection and is configured for plug‑on mounting in compatible FA/I‑Line assemblies, enabling fast replacement within the panel without rewiring. Common applications include feeders and branch circuits in manufacturing lines and commercial distribution where 3‑phase power is required. Key details are a 20 A continuous rating, 3 poles, and a 600 V maximum rating, aligned with FA‑Series I‑Line compatibility. The three‑pole design ensures simultaneous disconnection of all conductors in a triple‑phase circuit, enhancing safety and simplifying code‑compliant disconnection of power. When selecting a replacement, verify the panel’s compatibility with FA/I‑Line plug‑in breakers to ensure proper fit and coordinated trip with other devices in the same feeder run.