Snap Action Switches, also known as micro switches are a kind of momentary contact switch. The SM series subminiature basic micro switches are highly sensitive switches that respond to very small movements and can rapidly change from one contact position to the other and are therefore mostly used in aerospace, instrumentation, timing devices, vending machines, computer/business equipment, test instruments, HVAC equipment's, office equipment's, manually operated devices, valves.

11SM3-T Snap Action Switch from Honeywell is a sub-miniature basic switch. It comes with an operating force of 1.39 N, an operating temperature ranging between -54 to 121 °C and has a mechanical life up to 10,000,000 cycles at 95%. This switch is small size and light weight with ample electrical capacity.