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 often used as part of the electrical interlock on reversing contactors and starters. This auxiliary contact has one normally closed 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.