Siemens STB 21
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| 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[edit | edit source]
see Siemens STB
Variants[edit | edit source]
| Part number V23758- |
Colour cover/slider |
Diode | Travel | Response force | |
|---|---|---|---|---|---|
 |
A2113-A1 | Yellowish/Natural | No | 4 mm | 70 cN |
 |
A2113-A5 | Natural/Natural | Yes | 4 mm | 70 cN |
 |
A2133-A1 | Yellowish/Grey | No | 2.5 mm | 70 cN |
 |
A2133-A5 | Natural/Grey | Yes | 2.5 mm | 70 cN |
Keyboards[edit | edit source]
- Siemens AG
- Terminals 97801-101, T 4200
- Programmers PG 635, PG 685, PG 710/730, PG 750/770
- BTX client T 3310-2
- Teleprinter TA-BS/1200
- Tandberg Data (Tandberg Display):
- Tiki 100 microcomputer of Tiki Data (unconfirmed, maybe some of them)
Gallery[edit | edit source]
STB 21 2.5 mm[edit | edit source]
-
Fully disassembled, bottom views of components
