Schneider Electric PQ4606G Fusible Bus Plug

Schneider Electric’s Square D PQ4606G Fusible Bus Plug is a 60 A, four‑wire, three‑pole fusible plug‑in unit built for I‑Line busway systems, with a voltage rating of 277/480 VAC in the official specification and additional catalog listings that reflect 347/600 VAC; its compact, totally enclosed housing and lightweight construction are designed for easy handling in crowded electrical rooms. The unit accepts Class H, K, or R fuses and houses three fuses plus a grounding conductor within a four‑wire plug‑in configuration, while its sandwich‑type construction is designed to provide favorable voltage drop characteristics even at low power factors, and its polyester powder‑coat finish with plated contact surfaces helps resist corrosion and reduce contact resistance. With a short‑circuit current rating up to 200 kA at 480 V, PQ4606G is compatible with both aluminum and copper I‑Line busway systems and is commonly used to protect and interrupt feeder circuits in industrial facilities and data centers, delivering modular plug‑in protection for 60 A feeders in 3‑phase, 4‑wire distribution networks.