Safety interlock switch, also known as a micro switch is a kind of momentary contact switch. They enable circuit testing by manually pulling the rod actuator to the maintained-ON position, which is then reset when the door is closed. They are used in appliances, office equipment, test instruments, computer and business equipment, vending machines, communications equipment, HVAC equipment and medical and dental equipment.

23AC2 safety interlock switch from Honeywell offers a choice of momentary, maintained or pull-to-cheat actuation and automatically cuts power when service door or drawer is opened. The Honeywell switch is available with one or two SPDT switches and has a current rating of 5 A to 25 A.