Littelfuse Rotary Rocker and Tactile Switches - Littelfuse D6R40F1LFS, The Littelfuse D6R40F1LFS is a pushbutton key switch from the D6 Series.It features a normally open (NO) single pole double throw (SPDT) configuration with a 100mA rating.This switch is ideal for applications requiring reliable momentary contact.Typical uses include electronic devices and control panels requiring precise input mechanisms. Littelfuse D6R40F1LFS D6 Series Pushbutton Key Switch NO SPDT 100mA