These small, two-pin, SPST momentary pushbuttons are intended for mounting to PCBs, but they can also be plugged into standard 0.1" breadboards as shown in the picture to the right. We use them as reset buttons and user pushbuttons in several of our products, including the 3pi robot and most of ourOrangutan robot controllers. Note that this button should not be used with voltages above 12 V, and it should not be used to switch currents greater than 50 mA. This product is sold as a 5-pack.
Specs
Dimensions (in mm) of mini pushbutton switch: PCB-mount, 2-pin, SPST, 50mA.