Snap action switches, also known as micro switches, are devices used to quickly open or close an electrical circuit. These highly sensitive switches are commonly employed in various applications such as aerospace, household appliances, vending machines, timing devices, office equipment, computer and business machinery, testing instruments, HVAC systems, manual operation devices, and valves. The Honeywell 111SM602-H4 is a sub-miniature micro switch designed for precise on/off control. It offers options for actuation and operating characteristics, providing flexibility in different designs. The switch features an elongated mounting hole, facilitating accurate and convenient installation with its roller lever lever for easier mounting.