Type S magnetic contactors and starters are for motor control applications and 8903S lighting contactors are for lighting control applications. This internal nonconvertible contact is normally used as a holding circuit contact in three wire control. 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.