Type S magnetic contactors and starters are for motor control applications and 8903S lighting contactors are for lighting control applications. This external nonconvertible contact can be used as part of an electrical interlock system. This auxiliary contact has one normally open contact. Auxiliary contact module has a NEMA B600 contact rating with a maximum voltage rating of 600VAC. Inductive break rating of 3.0 A at 120 VAC. Contact modules are UL component recognized and CSA certified.