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 very often used in semi-trailer trucks, irrigation systems, office equipment, timing devices, medical and dental equipment, test instruments, manually operated devices, HVAC systems, and valves, among others.

BZ-2RW899-A2 Snap Action Switch from Honeywell is a standard "Large Basic" micro switch. This Honeywell Snap Action Switch offers low operating force and sensitive differential travel to suit the actuator type. It is available with a choice of actuation, termination, and operating characteristics to provide design flexibility. The current rating of this Roller Lever Micro Switch ranges from 15 A to 25 A.