Siemens STB 21

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STB 21
Siemens STB 21 V23758-A2133-A5 -- top.jpg
Manufacturer Siemens AG
Family Siemens STB
Product code V23758-A21n3-Annn
Introduced 1985
Discontinued late 1990s
Supersedes Siemens STB 11
Switch type Tactile
Clicky? no
Sense method Metal leaf
Rated lifetime > 10 M
Tactile force ~70 cN
Actuation force ~50 cN (start), ~100 cN (end)
Pretravel 2.0 or 1.7 ± 0.4 mm
Total travel 4.0 mm or 2.5 mm
Keycap mount RAFI mount
Switch mount PCB or plate mounted
Patents EP0158725 (1984)

Description and History

see Siemens STB

Variants

Part number
V23758-
Colour
cover/slider
Diode Travel Response force
STB21-A2113-A1.jpg A2113-A1 Yellowish/Natural No 4 mm 70 cN
STB21-A2113-A5.jpg A2113-A5 Natural/Natural Yes 4 mm 70 cN
STB21-A2133-A1.jpg A2133-A1 Yellowish/Grey No 2.5 mm 70 cN
Siemens STB 21 V23758-A2133-A5 -- top.jpg A2133-A5 Natural/Grey Yes 2.5 mm 70 cN

Keyboards

Gallery

STB 21 2.5 mm