Square D FA36020 Thermal Magnetic Circuit Breaker

FA36020 is a Square D FA-series three-pole molded‑case circuit breaker for 600 V systems, providing 20 A of protection with a thermal-magnetic trip and I-Line plug-in mounting. It uses a HACR-type trip, making it suitable for HVAC equipment, and combines thermal overload protection with short-circuit protection in a single device. Rated at 20 A and 600 V, it offers interrupting ratings up to 14 kA at 600 V (18 kA at 480 V and 25 kA at 240 V) and is intended for 3‑phase applications in commercial/industrial panels. The FA36020 features I-Line line-side connections and load-side lugs that accept 14-4 AWG aluminum or copper conductors, and its continuous-load rating is 80%. Typical applications include protecting 3‑phase distribution circuits and HVAC equipment in industrial controls and service panels. The device is designed for FA family installations with I-Line mounting, providing reliable protection in compact enclosures. It is manufactured by Square D (Schneider Electric) and is commonly used in commercial and industrial electrical distributions where 600 V or lower three-phase power needs safeguarding.