Schneider Electric PQ4203 Fusible Bus Plug Horizontal

Schneider Electric PQ4203 Fusible Bus Plug Horizontal is a plug‑in fusible unit for I‑Line busway systems that provides three‑phase protection with a dedicated ground path. Rated at 30 A and 240 V AC maximum, this four‑pole assembly (three hot conductors plus ground) plugs into the PQ/I‑Line busway to deliver fused protection at a modular point along the distribution run. Designed for horizontal installation, the unit uses a plug‑in connection to the bus bars for quick field replacement without a separate switch, making it well suited for industrial power distribution where scalable protection points are needed along a busway run. This PQ4203 family member is documented in current Schneider Electric/Square D catalogs and listings as a fusible bus plug with similar electrical ratings (30 A, 240 VAC, 4 poles) under the PQ4203G designation in contemporary product lines. In practice, it supports straightforward integration into existing I‑Line busway layouts, enabling reliable, localized protection at desired tap points in manufacturing floors, utility rooms, or other facilities relying on modular busway architectures.