Square D PFA36030N Circuit Breaker Neutral Bus Plug

Square D PFA36030N is a 600-volt, 30-amp neutral bus plug built for Square D I-Line plug-in panelboards and busways. This four-wire bus plug provides a dedicated neutral path for three-phase, four-wire systems, enabling safe connection to the neutral bus without separate lug hardware. The PFA36030N is documented as part of Square D’s bus-plug family and is offered in variants such as PFA36030GN, reflecting the same 30 A, 600 V, four-wire capability for I-Line installations. In typical industrial and commercial power-distribution environments, it pairs with I-Line breakers to support motor control centers, control panels, and OEM equipment that require a modular, plug-in neutral connection in 600 V systems. By design, it integrates into the Square D plug-in bus architecture to streamline panel assembly, reduce field wiring, and maintain proper electrical isolation and safety ratings across the bus plug interface.