Siemens STB 11
STB 11 is a tactile design, with an integrated diode. The plunger interacts with the contact leaf to generate the tactile feel.
Travel is 4.0 mm and 2.5 mm depending on model. 2.5 mm travel was introduced in 1983, for “Bedienfunktionen und für die Eingabe von Befehlen” (for for operating functions and for entering commands, i.e. keys that were not touch-typed). The other characteristics of the switches remained unchanged.
- STB 11 2.5 mm press release (August 1983), provided by Siemens
- Siemens STB 11 article on the Deskthority wiki