Square D FA36020 3-Phase I-Line Circuit Breaker

Square D FA36020 is a 3-pole, 20 A molded‑case circuit breaker (MCCB) in the FA (F‑Frame) I‑Line family, designed for three‑phase power distribution. It accepts 600 VAC and 250 VDC, making it suitable for both AC and DC panelboard applications that use I‑Line infrastructure. The unit employs a thermal‑magnetic trip mechanism for overcurrent protection and provides line‑side I‑Line connections with load‑side terminals for standard wiring, supporting reliable protection in industrial control panels, switchboards, and equipment enclosures. Interrupting ratings include 25 kA at 240 VAC, 18 kA at 480 VAC, and 14 kA at 600 VAC, plus 10 kA at 250 VDC, ensuring fast fault clearance across the device’s voltage range. Designed for use in Square D I‑Line panelware, the FA36020 is a practical choice for protecting three‑phase motor and power circuits in commercial and industrial settings that require a compact, field‑reliable MCCB with clearly defined voltage and current ratings.