The 1977067-1 Tactile Switches FSMMSH=R/A TACT SWITCH, SMT W/OUT PEGS, part number from TE Connectivity, is a surface mount tactile switch, also known as a momentary pushbutton. It is a single pole normally open (SPNO) device, which can be connected in a circuit to switch a load. This switch requires manual pushbutton action and is commonly used in applications such as control panels, audio/video equipment, lighting systems, and vending machines. It features a flat and low profile, quick bounce time, and is compatible with soldering profiles of 260°C. Its contact resistance is 30mO typical and its insulation resistance is 100MO at 500V DC. The contact rating is 100mA at 24V DC, and the operating temperature range is -25°C to 85°C.