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 aircraft, ordinance and moist or dusty industrial environments.

5SE1 Snap Action Switch from Honeywell is an environmentally-sealed enclosed basic micro switch. Its miniature package size requires a small place on the equipment. Designed with sturdy aluminum housing, this Honeywell 5SE1 micro switch provides corrosion resistance and seals precision switch contacts from contamination. This Miniature Snap Action Switch features a high temperature construction for use to 149 °C [300 °F].