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. These highly sensitive switches are quite often used in various applications, including valves, manually operated devices, HVAC systems, medical and dental equipment, test instruments, office equipment, timing devices, semi-trailer trucks, and irrigation systems.

DT-2RV22-A7 Snap Action Switch from Honeywell is a standard basic micro switch. This Honeywell Switch is designed with two independent single-pole double throw circuits in a single housing. Both these circuits are actuated by one actuator. It has temperature tolerance to 82 °C [180 °F]. The design of this Honeywell Snap Action Switch allows several wiring combinations, as well as mounting interchangeability with type Z switches.