Schneider Electric 9999 PN31 Contact Attachment

Schneider Electric's Square D 9999-PN31 is a heavy-duty auxiliary contact attachment in a white-and-black housing designed to mount on compatible Square D 9999-class contactors. Rated for up to 600 VAC and 12 A, it provides an additional control contact for signaling, interlocking, or holding-circuit applications in industrial control panels. Marketed as an auxiliary contact component (PN31), the 9999-PN31 is listed by distributors and is known to be discontinued by the manufacturer, with remaining stock available from third-party suppliers. Use this attachment when you need extra control contacts without replacing the primary contactor.