Industrial 9999 SB-7 Power Pole Starter Switch

Square D 9999SB7 Type S power-pole module adds a single normally closed power pole to a NEMA Size 0 starter, expanding a starter assembly’s pole count without replacing the main contactor. This 1‑pole add‑on is designed for use with Square D’s 9999 family of combination starters and contactors and provides one normally closed (NC) pole for interlock or signaling in control circuits. It is rated for up to 30 A for lighting‑contactor duty, making it a compact solution for start/stop interlocks in industrial equipment. Catalog number 9999SB7, manufactured by Square D (Schneider Electric), the power-pole adder is intended to be used alongside other adders to tailor a control configuration while preserving a compact form factor for applications such as machine tools, conveyors, fans, pumps, and other industrial motor-control setups.