Square D PQ-3603 I-Line Busway Switch Series 2

The Square D PQ3603G Series 2 I-Line Busway Switch is a 30‑amp, 600‑volt fusible plug‑in unit designed for three‑phase I‑Line busway distributions. This 3‑pole, 3‑fuse (plus grounding) device uses a plug‑in connection to insert into compatible I‑Line busways, enabling fast isolation of feeders within industrial power distribution systems. As part of the PQ‑series I‑Line busway family, it supports Series 2 installations and is intended for use with I‑Line busway modules that accept PQ‑type fusible plugs. The catalog number PQ3603G identifies the unit, marketed by Square D (Schneider Electric) as a Series 2 I‑Line busway plug‑in switch. Typical applications include feeders and branch circuits in factories, data centers, and other large commercial facilities where modular busway distribution is used. With a 30 A rating at 600 VAC, it aligns with standard industrial practices for mid‑range load applications and integrates with other I‑Line busway components to form a compact, scalable switch‑and‑protect solution.