The 111SM1-T Honeywell Snap Action Switch is a sub-miniature basic micro switch. Compact and lightweight, this Honeywell Snap Action Switch delivers long mechanical life. It features an elongated mounting hole for more accurate and easier mounting. Snap Action Switches, also known as micro switches, are switch devices that are used to open or close an electrical circuit at a rapid speed.

The Honeywell 111SM1-T switch comes with a choice of actuation to provide design flexibility. With an operating temperature range between 55 °C to 125 °C [-67 °F to 257 °F], this On-Off Switch offers reliable performance even in harsh environments. These highly sensitive switches are very often used in applications including aerospace, appliances, vending machines, timing devices, office equipment, computer and business equipment, test instruments, HVAC systems, manually operated devices, and valves.