Square D NA361000 Three-Phase Circuit Breaker

Square D NA361000 is a three‑pole molded case circuit breaker rated for 1000 A at up to 600 V, built in the NA frame with I‑Line plug‑in mounting for Square D panels. Its thermal‑magnetic trip unit is non‑interchangeable, delivering coordinated overload and short‑circuit protection, with standard load‑end terminals and a 40°C ambient rating suited for typical industrial enclosure environments. The device carries interrupting ratings of 100 kA at 240 VAC, 50 kA at 480 VAC, and 25 kA at 600 VAC, enabling safe interruption across a range of fault currents and voltages. As a plug‑in NA‑series MCCB, it integrates with Square D panels designed for NA frames and I‑Line devices, providing a robust main or feeder protection solution in 3‑phase, 600 V class electrical systems.