Image is Representational - See Manufacturer Specs | MICRO SWITCH Basic Switches: BZ Series - SPDT - 15A@250Vac/Vdc w/1PA2 Boot & Mtg Hdwr Kit A Snap Action Switch is a type of momentary contact micro switch which operates at rapid speed as it takes very little force or stimulus to operate. These highly sensitive switches are very often used in test instruments medical/dental equipment. This Snap Action Microswitch is also used in HVAC equipment manually operated devices and valves.BZ-2RQ77 Snap Action Switch from Honeywell comes with low operating force and differential travel elongated mounting hole for easier more accu