Schneider Electric 1702SB04 AC Contactor Form S

Schneider Electric's Square D 1702SB04 Form S AC contactor is a 120 VAC coil motor-contactor rated for 21 A, with a 13.5 HP rating at 660 VAC for the main circuit. The Form S designation means the coil is powered from a separate control source, allowing the control circuit to be independent of the main power circuit. This device is part of Schneider Electric's Type S line of contactors used to start and stop AC motors in industrial control panels. The model 1702SB04 identifies the specific coil-contact arrangement and ratings within the 1702SB family. Typical applications include controlling motors such as pumps, fans, and conveyors in commercial and industrial equipment where a 120 V control signal is used to switch a 660 V motor circuit up to 21 A.